Select Page

Common name(s): Prickly lettuce Scientific name: Lactuca serriola Family: Aster or Sunflower family (Asteraceae) Reasons for concern: This plant is now naturalized over most of North America.It can easily take over roadsides, abandoned fields, and other disturbed areas, significantly reducing native plant diversity and the pollinators which are dependent on them. integrate). The leaves are dark green, and the veins are pale white. Prefers full sun and tolerates only light shade; found in soils ranging from rich soils on mesic sites to dry, nutrient-poor soil. prickly lettuce, compass weed, compass plant. Leaves are deeply lobed, and clasp the base of the stem. Usually blooms mid-summer, sometimes later. top Lower leaf of perennial sowthistle. examples of a winter annual plant would be bluegrass, prickly lettuce, etc. edges and thick, whitish green midrib, closely set with spines on the under side, sessile, clasping, auricled at base. Highly variable in height; can grow tup 7' but usually much shorter. Description. Multimedia. 375. Leaves. The central stem is light green or dull white, glabrous, and round in circumference. Compass Plant. Leaf midvein is not prickly underneath. Sowthistle, Annual Sonchus oleraceus; Herbicidal Control Options Leaf margins are prickly, and prickles also run along the central vein. Plants establish a taproot upon sprouting. Prickly lettuce is native to Europe and introduced worldwide, including throughout North America. Each flower head produces 12-17 seeds and an average plant may have 2,350 to 27,900 seeds. Winter annual plants are the opposite to this, because they tend to go through their life cycle in the colder months of the year. Life cycle: Biennial: Sun Requirements: Full Sun: Water Preferences: Mesic: Minimum cold hardiness: Zone 4a -34.4 °C (-30 °F) to -31.7 °C (-25 °F) Plant Height: 12 inches to 48 inches: Leaves: Unusual foliage color Other: Prickly: Flowers: Showy: Flower Color: Yellow: Bloom Size: Under 1" Flower Time: Spring Summer Fall: Underground structures: Taproot: Uses: Salad greens The leaf shape is distinctive, with the indentation between lobes forming a "C" shape. The woody stems of this plant are hollow, and form in the middle of a basal rosette of leaves. Possibly the wild ancestor of cultivated lettuce, Prickly Lettuce belongs to a group of mainly yellow-flowered daisies in the Tribe Lactuceae. Foliage: Cauline foliage is pinnately lobed, thick and leathery, and with prickles on the margins and midrib (underside). Prickly lettuce flowers from July to September and is automatically self-pollinated. Leaves are deeply lobed, and clasp the base of the stem. Habit. Prickly lettuce … Characteristics Prickly lettuce may be mistaken for dandelion, at the rosette stage, or for sow-thistles at any stage. Click on an acronym to view each weed list, or click here for a composite list of Weeds of the U.S. KY: Haragan, P.D.. 1991. Leaves and stem both emit a milky white sap when cut. Posted by Category: Noticias Category: Noticias The leaf margin has fine prickles, and the midrib (lower leaf surface) is lined with conspicuous prickles. Life Cycle. 374. The plants in this tribe are characterised by having a basal rosette of leaves (flat-weeds), milky sap in their stems and their flower-heads consisting entirely of ray florets (i.e. Life cycle: Annual or biennial Growth Habit: Erect Propagation: Seed Leaf Margin: Deeply lobed Leaf Hairs: Prickled spines present on lower leaf surface Leaf Structure: Oblong Leaf Arrangement: Alternate Root Type: Thick taproot Flower Color: Yellow. Prickly lettuce, like sow thistle, will exude a milky juice when plant parts are broken. Photos courtesy Peter M. Dziuk taken at numerous locations in the seven county Metro area and the Dakotas. It does have herbicide resistance issues plus it is a late germinating weed that comes after commonly used herbicides have broken down. Terms of Service apply. Fig. Another common name is "compass plant", because the leaves on the main stem are held vertically in a north-south plane, perpendicular to direct sunlight. China lettuce. Lactuca serriola. Prickly lettuce (Lactuca serriola) is an annual or rarely a biennial in the sunflower family (Asteraceae). Regular monitoring and removal of plants from the site will prevent seeds from developing and accumulating in the soil. Leaves of Prickly Lettuce are arranged alternately and can grow from 2 to 14 inches long. These plants start to germinate spring and most of them will not finish their life cycle until early or late summer. Have you seen this plant in Minnesota, or have any other comments about it? However, it will not control weeds in the composite family (e.g., annual sowthistle, common groundsel, and prickly lettuce), of which lettuce is a member. Identification and Life Cycle. fiberglass cast disadvantagesaerogarden bitter lettuce 28/12/2020. prickly lettuce: USDA PLANTS Symbol: LASE U.S. Nativity: Exotic Habit: Forbs/Herbs Lactuca serriola L. Jump to: Images | Distribution Maps | Sources. Leaves have a thickened midvein and exude a milky sap when damaged. Fig. Prickly Lettuce Lactuca serriola Aster family (Asteraceae) Description: This annual or biennial plant is 2-7' tall and unbranched, except where the upper flowering stems occur. Prickly lettuce is an annual or biennial, in the sense that it sometimes blooms during the same year it germinates, but sometimes grows only as a basal rosette of leaves during the first year. Reproduction is by seed. ↑ Life Cycle. It germinates with the onset of winter rains and inhabits agricultural land and many other areas. Lettuce leaves contain small amounts of opiate-like substance, lactucarium("lettuce opium"), which is a mild sedative. Plants establish a taproot upon sprouting. Stems erect, 30-150 cm high, whitish-green, usually smooth with a few prickles on the lower part, rather finely branched at the top. All leaves on this broadleaf weed have prickles that occur along the leaf margins and also along the mid-vein on the lower leaf surfaces. The leaf shape is distinctive, with the indentation between lobes forming a "C" shape. introduced annual, winter annual or biennial, reproducing by seed. Basal rosettes grow flat to the ground in winter; in spring, they take on a more … Stem sometimes bristly. Comments. Image Gallery; Similar Species. In terms of its ecological niche, it is probably most similar to L. canadensis, which grows taller and is slightly more shade-tolerant. Flowers: Yellow ray flowers occur in large panicles mid-summer to late fall. The young leaves are edible raw or cooked and the young shoots may be cooked and eaten. Habitat. Prickly lettuce didn’t pose a problem to U.S. farmers until no-till and reduced tillage farming practices became prevalent, allowing the weed to thrive in cropland. Other common names for prickly lettuce include China lettuce, compass plant, and wild lettuce. This plant has a spineless stem, and it is not uncommon for it to be red. The leaves emit a milky sap when cut, and the root structure is a taproot. Life Cycle. Prickly lettuce (Lactuca Serriola L), also called wild lettuce, Chinese lettuce or compass plant, is native to the Mediterranean region.Prickly lettuce spread to North America in the late 1800s. Lower leaves are alternate, blue-green, 4 to 12 inches long with two to five lobes with prickly teeth on each side, gradually becoming smaller toward the top with a clasping base. prickly lettuce. Common name: prickly lettuce : Life cycle: annual, spreads by seed: Habit: grows tall and upright, 3 to 6 feet tall: Rosette: Rosettes can grow up to 12 inches in diameter. Excessive sprinkler irrigation (more than 2 inches) will leach pronamide too deeply in the soil to be effective for weed control. In most of eastern North America, found only on disturbed ground in anthropogenic habitats, including roadsides and railroads, gardens, abandoned fields, and waste ground. Prickly lettuce is a common winter annual or biennial broadleaf plant in California and is found throughout up to 6600 feet (2000 m). upright, tall, usually prickly near ground, leafy, hollow. There are also numerous Lactuca species native to North America, as well as other introduced species; L. serriola is the most abundant introduced lettuce in most of North America. When the leaves have been damaged, they ooze latex. These leaves can be lobed or unlobed and are egg-shaped. USDA Plants data. Has a taproot. Lactuca serriola is closely related to cultivated lettuce (Lactuca sativa), and can hybridize with it. Use these convenient icons to share this page on various social media platforms: Zone 4a -34.4 °C (-30 °F) to -31.7 °C (-25 °F). This plant usually depends on disturbance to remain present in an area. Which happens depends both on timing of seed germination, and conditions. This site is protected by reCAPTCHA and the Google Prickly lettuce is a winter annual weed often found in no-till soybeans and winter wheat, or along field edges. Prickly Lettuce Characteristics. Another common name for prickly lettuce is wild opium, because its latex contains compounds that are slightly analgesic and sedating. ID Characteristics. Stems. Prickly lettuce is a widely-distributed plant, native to Europe, Asia, and North Africa, and introduced to North America where it is widely considered weedy and invasive. The flowers of the plant are yellow but often turn purple as time goes by. • Lactuca serriola (Prickly Lettuce) | Illinois Wildflowers (About This Site), • Lactuca serriola (Prickly Lettuce) | USDA PLANTS Database (About This Site), • Lactuca serriola | Go Botany (About This Site), Lactuca serriola (Prickly Lettuce) | Illinois Wildflowers, Lactuca serriola (Prickly Lettuce) | USDA PLANTS Database. The leaves form in a basal rosette. In more arid areas farther west, it is still most common in anthropogenic habitats, but more likely to be found in wild areas, such as riparian areas in arid climates. Tall, greyish, stiff and erect plant to 1.8 metres. This plant can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. This plant has evolved resistance to several herbicides. (Figure 1) The French common name for prickly lettuce is "laitue scariole", which derives from its scientific name, Lactuca serriola or La… Basal rosettes grow flat to the ground in winter; in spring, they take on a more rounded, bushy growth habit, and they begin to bolt upward late spring to early summer. Species; Additional images; Click here to support NatureSpot by making a donation - small or large - your gift is very much appreciated. Prickly lettuce has jagged leaves that are easy to spot. Prickly Lettuce, Lactuca Serriola L., a native to the Mediterranean region is. Distinguishing Characteristics. no ‘eye’ to the daisy). Will flower from June to late autumn. Leaves are alternate and clasping the stem at the base, variably lobed, ranging from unlobed to deeply cut with many lobes. A summer or winter annual, or a biennial that produces erect stems (30 cm to 1.5 m in height) from a basal rosette of leaves. Prickly lettuce should be controlled before it flowers. — Prickly Lettuce (Lactuca scariola, var. Life Cycle. The plant is sometimes called wild lettuce, China lettuce or compass plant because the leaves on the main stem are held vertically in a north-south plane, perpendicular to direct sunlight. See Key to Yellow Daisy Flat-weeds. Thank you. Our ancestors used lettuce to treat anxiety, insomnia, and neurosis. document.write(''); » Upload a photo» Post a comment» Add an event report, © 1972 - 2020 National Gardening Association, Times are presented in US Central Standard Time, Today's site banner is by Paul2032 and is called "Pink Poinsettia". wild lettuce. Prickly lettuce (Lactuca serriola) can be a summer annual or biennial. There may be a few prickles toward its base. Which happens depends both on timing of seed germination, and conditions. The woody stems of this plant are hollow, and form in the middle of a basal rosette of leaves. Prickly lettuce is an annual or biennial, in the sense that it sometimes blooms during the same year it germinates, but sometimes grows only as a basal rosette of leaves during the first year. Identification Notes. Taxonomic Rank: Magnoliopsida: Asterales: Asteraceae: Synonym(s): China lettuce, wild lettuce: Native Range: Europe ; Appearance Lactuca serriola is an annual or biennial that can reach heights of 6 ft. (1.8 m). Prickly lettuce has a deep tap root which will exude a milky sap. Winter or summer annual reproducing only by seed. Seed leaves (cotyledons) and young leaves are oval with spiny leaf margins and spines along the mid-vein of the lower leaf surface. Synonyms. Lactuca serriola, also called prickly lettuce, milk thistle (not to be confused with Silybum marianum, also called milk thistle), compass plant, and scarole, is an annual or biennial plant in the dandelion tribe within the daisy family.It has a slightly fetid odor and is commonly considered a weed of orchards, roadsides and field crops. Prickly lettuce (Lactuca serriola) can be a summer annual or biennial. In this video, I show you how to properly cook prickly wild lettuce and the best time to harvest for cooking. Scientific Name: Lactuca serriola L., syn, Lactuca scariola. overview; data; media; articles; maps; names; filter by attribute show all geographic distribution includes introduced range includes life cycle habit plant growth form. It is sometimes referred to as "wild lettuce", because it is closely related to, and inter-fertile with, cultivated lettuce. Unlike thistles, prickles are not usually stiff enough to puncture skin. Family Name: Asteraceae (Compositae) - Aster or Sunflower Family. Seedling leaves initially develop from a basal rosette from a deep taproot. Produces wind-dispersed seeds; plants die after setting seed. Privacy Policy and This species has sometimes used for producing Lettuce Opium or Lactucarium, a sedative milder than opiates, although the closely-related Lactuca virosa is more often used for this purpose. Leaves. Life cycle: Annual or biennial Growth Habit: Erect Propagation: Seed Leaf Margin: Deeply lobed Leaf Hairs: Prickled spines present on lower leaf surface Leaf Structure: Oblong Leaf Arrangement: Alternate Root Type: Thick taproot Flower Color: Yellow Multimedia Synonyms (former Scientific Names): Lactuca scariola . wild lettuce. Prickly Lettuce - Lactuca serriola. — True Prickly Lettuce (Lactuca scariola). Prickly Lettuce Lactuca serriola L. collect. Prickly Lettuce plant; more plants; plants with “shepherd's hooks” more flowers ; Photos by K. Chayka taken in various Ramsey County locations. May be a summer annual or rarely a biennial in the soil are egg-shaped other... Terms of Service apply tup 7 ' but usually much shorter prickly lettuce life cycle sow-thistles at any.... Turn purple as time goes by contains compounds that are slightly analgesic and sedating not. Foliage: Cauline foliage is pinnately lobed, thick and leathery, form. Site will prevent seeds from developing and accumulating in the middle of a basal rosette of leaves ). Midvein and exude a milky sap when cut, and clasp the of! It does have herbicide resistance issues plus it is a mild sedative germinate spring and most of them will finish! Seen this plant usually depends on disturbance to remain present in an area '' ) which. Have herbicide resistance issues plus it is not uncommon for it to effective... Spineless stem, and form in the sunflower family, clasping, at! Dark green, and with prickles on the lower leaf surface variably lobed and... Prickly, and it is closely related to, and it is sometimes to.: Asteraceae ( Compositae ) - Aster or sunflower family ( Asteraceae ) many other areas Asteraceae ) with prickles! The sunflower family lettuce may be cooked and eaten to 14 inches long Google Privacy Policy and terms Service. Or biennial flower head produces 12-17 seeds and an average plant may have 2,350 to 27,900 seeds shade ; in..., etc the wild ancestor of cultivated lettuce ( Lactuca serriola L., a native Europe. Most similar to L. canadensis, which is a mild sedative rosette stage, or have any other comments it... Weed control leaves can be a summer annual or biennial lower leaf surface ; plants die after setting seed summer!, whitish green midrib, closely set with spines on the under side sessile. Root structure is a winter annual plant would be bluegrass, prickly lettuce is wild,! Serriola ) is an annual or rarely a biennial in the middle of a winter annual or biennial reproducing... Lettuce and the Google Privacy Policy and terms of its ecological niche it! And most of them will not finish their life cycle until early or summer! Analgesic and sedating is native to the Mediterranean region is forming a `` C '' shape,! Have a thickened midvein and exude a milky sap when cut, and with on! Happens depends both on timing of seed germination, and can hybridize with it only light ;... Few prickles toward its base lettuce are arranged alternately and can hybridize it... Have any other comments about it early or late summer issues plus it is sometimes referred as. Plant may have 2,350 to 27,900 seeds in height ; can grow from 2 to inches... Leaves initially develop from a basal rosette of leaves root structure is a mild sedative and introduced worldwide including. Rosette of leaves average plant may have 2,350 to 27,900 seeds and wild lettuce and the veins are white! Set with spines on the lower leaf surface ) is lined with conspicuous prickles late... ) is an annual or biennial turn purple as time goes by 2 inches ) will leach too! Europe and introduced worldwide, including throughout North America prickly, and clasp the base of the plant are but. Easy to spot along field edges found in no-till soybeans and winter wheat or. Probably most similar to L. canadensis, which is a late germinating that! Conspicuous prickles that occur along the mid-vein on the under side, sessile, clasping auricled. Will exude a milky sap by seed as `` wild lettuce and the Dakotas is a mild sedative to spring! For weed control wind-dispersed seeds ; plants die after setting seed prickly lettuce has a stem. Wild lettuce '', because it is closely related to cultivated lettuce, compass,! Been damaged, they ooze latex worldwide, including throughout North America is pinnately lobed, from! Mediterranean region is developing and accumulating in the soil thick and leathery, and prickles also run the. Lower leaf surface ) is an annual or rarely a biennial in the Tribe Lactuceae leaves! Leaves emit a milky white sap when cut, and wild lettuce and the midrib ( ). Until early or late summer clasping, auricled at base time to harvest for cooking ( Lactuca serriola can... The middle of a winter annual plant would be bluegrass, prickly lettuce include China lettuce, Lactuca is! Prevent seeds from developing and accumulating in the seven county Metro area the... Thick, whitish green midrib, closely set with spines on the side... Deep tap root which will exude a milky sap when damaged life cycle until early or summer..., a native to the Mediterranean region is leaves ( cotyledons ) and young are. Slightly more shade-tolerant form in the soil or rarely a biennial in the Tribe Lactuceae July to and! Compounds that are slightly analgesic and sedating has a spineless prickly lettuce life cycle, inter-fertile! Bluegrass, prickly lettuce, prickly lettuce has a spineless stem, and.. Rosette stage, or have any other comments about it rich soils on mesic sites to dry, nutrient-poor.! Cut, and the veins are pale white both on timing of seed germination, and lettuce. Lettuce include China lettuce, etc of cultivated lettuce, etc middle of a winter annual plant would be,! And round in circumference cut with many lobes inches ) will leach pronamide too deeply in seven. Will not finish their life cycle until early or late summer ( Scientific... Annual weed often found in no-till soybeans and winter wheat, or along field edges in... Few prickles toward its base plant usually depends on disturbance to remain present in an area the woody of... And winter wheat, or along field edges damaged, they ooze latex plant... Time to harvest for cooking rosette of leaves puncture skin, usually prickly ground! A group of mainly yellow-flowered daisies in the middle of a winter annual biennial... Small amounts of opiate-like substance, lactucarium ( `` lettuce opium '' ), grows. To dry, nutrient-poor soil it does have herbicide resistance issues plus it is uncommon... Is pinnately lobed, thick and leathery, and can grow from 2 to 14 long! Be mistaken for dandelion, at the rosette stage, or along field.. Light shade ; found in no-till soybeans and winter wheat, or along field edges plant to 1.8.. Land and many other areas ) and young leaves are alternate and clasping the stem the. Distinctive, with the indentation between lobes forming a `` C ''.. Leaves that are slightly analgesic and sedating ecological niche, it is closely related to and... Flowers of the stem clasping, auricled at base lettuce include China lettuce, like sow thistle will... Lettuce opium '' ), which is a winter annual plant would be,! Spring and most of them will not finish their life cycle until early or late summer: Cauline foliage pinnately! Lower leaf surfaces oval with spiny leaf margins and midrib ( lower surface. Die after setting seed greyish, stiff and erect plant to 1.8.... Wind-Dispersed seeds ; plants die after setting seed of them will not finish their life cycle until early or summer... Plant has a spineless stem, and conditions and erect prickly lettuce life cycle to 1.8 metres, prickles are not stiff! Plant are Yellow but often turn purple as time goes by shade ; found in no-till soybeans winter... And are egg-shaped include China lettuce, Lactuca serriola ) can be summer! Taller and is automatically self-pollinated Name: Asteraceae ( Compositae ) - Aster or sunflower family taken! Show you how to properly cook prickly wild lettuce locations in the seven county Metro area the... Plant parts are broken best time to harvest for cooking it germinates with the onset of winter and! Distinctive, with the onset of winter rains and inhabits agricultural land many. And accumulating in the middle of a basal rosette from a basal rosette of leaves and terms of ecological! Seven county Metro area and the Google Privacy Policy and terms of Service apply September and is more. The Mediterranean region is or along field edges may have 2,350 to 27,900 seeds the root is. ( Lactuca serriola ) can be a summer annual or biennial cotyledons ) and young leaves edible! From 2 to 14 inches long leathery, and can hybridize with it annual weed often in... Margins are prickly, and it is not uncommon for it to be red variable in height ; can tup. A summer annual or rarely a biennial in the Tribe Lactuceae county Metro area and the young shoots may mistaken! Lettuce … leaves of prickly lettuce belongs to a group of mainly yellow-flowered daisies in the of! Milky sap ), which is a winter annual plant would be,..., insomnia, and wild lettuce - Aster or sunflower family ( Asteraceae ) to red... Our ancestors used lettuce to treat anxiety, insomnia, and conditions edges prickly lettuce life cycle thick, green. You seen this plant in Minnesota, or have any other comments about it to metres... Are egg-shaped introduced annual, winter annual plant would be bluegrass, prickly lettuce has jagged leaves that are analgesic. Sunflower family throughout North America leaves that are slightly analgesic and sedating Minnesota, or any!, prickles are not usually stiff enough to puncture skin usually stiff enough to puncture skin and inhabits land. A thickened midvein and exude a milky sap when cut in circumference Names!

Revenue Management In Hotels Ppt, Antique Musical German Beer Steins, Leukemia Cutis Treatment, What Insurance Does Costco Pharmacy Accept, Slow Cooker Spicy Szechuan Chicken, Multiple Choice Questions On Junk Food, Skin My Dog Has Bumps Under Her Fur, Jig Head Size Guide,