Regular monitoring and removal of plants from the site will prevent seeds from developing and accumulating in the soil. Leaves and stem both emit a milky white sap when cut. Unlike thistles, prickles are not usually stiff enough to puncture skin. The leaf shape is distinctive, with the indentation between lobes forming a "C" shape. 375. When the leaves have been damaged, they ooze latex. Prickly lettuce flowers from July to September and is automatically self-pollinated. This plant has evolved resistance to several herbicides. Leaves are deeply lobed, and clasp the base of the stem. 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. Terms of Service apply. Family Name: Asteraceae (Compositae) - Aster or Sunflower Family. 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. 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. Multimedia. 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. 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. Foliage: Cauline foliage is pinnately lobed, thick and leathery, and with prickles on the margins and midrib (underside). The woody stems of this plant are hollow, and form in the middle of a basal rosette of leaves. Another common name for prickly lettuce is wild opium, because its latex contains compounds that are slightly analgesic and sedating. Identification Notes. Have you seen this plant in Minnesota, or have any other comments about it? Posted by Category: Noticias Category: Noticias Reproduction is by seed. The central stem is light green or dull white, glabrous, and round in circumference. 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. 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. Prickly lettuce is a common winter annual or biennial broadleaf plant in California and is found throughout up to 6600 feet (2000 m). Prickly lettuce (Lactuca serriola) can be a summer annual or biennial. Which happens depends both on timing of seed germination, and conditions. 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. ID Characteristics. 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". Distinguishing Characteristics. introduced annual, winter annual or biennial, reproducing by seed. These leaves can be lobed or unlobed and are egg-shaped. Flowers: Yellow ray flowers occur in large panicles mid-summer to late fall. integrate). 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. Comments. Fig. Winter annual plants are the opposite to this, because they tend to go through their life cycle in the colder months of the year. Privacy Policy and top 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 (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. Description. It does have herbicide resistance issues plus it is a late germinating weed that comes after commonly used herbicides have broken down. Prickly lettuce has a deep tap root which will exude a milky sap. Scientific Name: Lactuca serriola L., syn, Lactuca scariola. The leaf shape is distinctive, with the indentation between lobes forming a "C" shape. Image Gallery; Similar Species. Excessive sprinkler irrigation (more than 2 inches) will leach pronamide too deeply in the soil to be effective for weed control. Prickly lettuce … 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. Life Cycle. Leaves have a thickened midvein and exude a milky sap when damaged. Synonyms. Thank you. 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). — Prickly Lettuce (Lactuca scariola, var. 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. Possibly the wild ancestor of cultivated lettuce, Prickly Lettuce belongs to a group of mainly yellow-flowered daisies in the Tribe Lactuceae. Has a taproot. USDA Plants data. Seed leaves (cotyledons) and young leaves are oval with spiny leaf margins and spines along the mid-vein of the lower leaf surface. These plants start to germinate spring and most of them will not finish their life cycle until early or late summer. Life Cycle. upright, tall, usually prickly near ground, leafy, hollow. Habit. See Key to Yellow Daisy Flat-weeds. 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. 374. Lettuce leaves contain small amounts of opiate-like substance, lactucarium("lettuce opium"), which is a mild sedative. Prickly Lettuce plant; more plants; plants with “shepherd's hooks” more flowers ; Photos by K. Chayka taken in various Ramsey County locations. 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. Our ancestors used lettuce to treat anxiety, insomnia, and neurosis. Species; Additional images; Click here to support NatureSpot by making a donation - small or large - your gift is very much appreciated. prickly lettuce, compass weed, compass plant. — True Prickly Lettuce (Lactuca scariola). Stems erect, 30-150 cm high, whitish-green, usually smooth with a few prickles on the lower part, rather finely branched at the top. Prickly lettuce should be controlled before it flowers. Prickly Lettuce Lactuca serriola L. collect. 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. Other common names for prickly lettuce include China lettuce, compass plant, and wild lettuce. Photos courtesy Peter M. Dziuk taken at numerous locations in the seven county Metro area and the Dakotas. 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. Prickly lettuce (Lactuca serriola) is an annual or rarely a biennial in the sunflower family (Asteraceae). Identification and Life Cycle. 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). Leaf midvein is not prickly underneath. Plants establish a taproot upon sprouting. Synonyms (former Scientific Names): Lactuca scariola . In most of eastern North America, found only on disturbed ground in anthropogenic habitats, including roadsides and railroads, gardens, abandoned fields, and waste ground. 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 Sowthistle, Annual Sonchus oleraceus; Herbicidal Control Options • 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. Highly variable in height; can grow tup 7' but usually much shorter. Lactuca serriola. There may be a few prickles toward its base. Habitat. The leaves emit a milky sap when cut, and the root structure is a taproot. Plants establish a taproot upon sprouting. Seedling leaves initially develop from a basal rosette from a deep taproot. China lettuce. edges and thick, whitish green midrib, closely set with spines on the under side, sessile, clasping, auricled at base. 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. Leaves. Stems. This plant usually depends on disturbance to remain present in an area. The young leaves are edible raw or cooked and the young shoots may be cooked and eaten. Usually blooms mid-summer, sometimes later. It germinates with the onset of winter rains and inhabits agricultural land and many other areas. Each flower head produces 12-17 seeds and an average plant may have 2,350 to 27,900 seeds. Leaf margins are prickly, and prickles also run along the central vein. 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. Prefers full sun and tolerates only light shade; found in soils ranging from rich soils on mesic sites to dry, nutrient-poor soil. The flowers of the plant are yellow but often turn purple as time goes by. wild lettuce. Prickly Lettuce - Lactuca serriola. Prickly Lettuce, Lactuca Serriola L., a native to the Mediterranean region is. 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. prickly lettuce. no ‘eye’ to the daisy). Winter or summer annual reproducing only by seed. This site is protected by reCAPTCHA and the Google The leaves form in a basal rosette. In terms of its ecological niche, it is probably most similar to L. canadensis, which grows taller and is slightly more shade-tolerant. examples of a winter annual plant would be bluegrass, prickly lettuce, etc. (Figure 1) The French common name for prickly lettuce is "laitue scariole", which derives from its scientific name, Lactuca serriola or La… The leaves are dark green, and the veins are pale white. Prickly lettuce is native to Europe and introduced worldwide, including throughout North America. Prickly Lettuce Characteristics. In this video, I show you how to properly cook prickly wild lettuce and the best time to harvest for cooking. Lactuca serriola is closely related to cultivated lettuce (Lactuca sativa), and can hybridize with it. Produces wind-dispersed seeds; plants die after setting seed. Prickly lettuce has jagged leaves that are easy to spot. Prickly lettuce (Lactuca serriola) can be a summer annual or biennial. Basal rosettes grow flat to the ground in winter; in spring, they take on a more … This plant has a spineless stem, and it is not uncommon for it to be red. 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. The leaf margin has fine prickles, and the midrib (lower leaf surface) is lined with conspicuous prickles. Leaves. Prickly lettuce is a winter annual weed often found in no-till soybeans and winter wheat, or along field edges. 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. Will flower from June to late autumn. 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. 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 Stem sometimes bristly. Fig. Characteristics Prickly lettuce may be mistaken for dandelion, at the rosette stage, or for sow-thistles at any stage. Which happens depends both on timing of seed germination, and conditions. 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. prickly lettuce: USDA PLANTS Symbol: LASE U.S. Nativity: Exotic Habit: Forbs/Herbs Lactuca serriola L. Jump to: Images | Distribution Maps | Sources. Tall, greyish, stiff and erect plant to 1.8 metres. Leaves are deeply lobed, and clasp the base of the stem. ↑ Life Cycle. Prickly lettuce, like sow thistle, will exude a milky juice when plant parts are broken. Compass Plant. Leaves are alternate and clasping the stem at the base, variably lobed, ranging from unlobed to deeply cut with many lobes. Leaves of Prickly Lettuce are arranged alternately and can grow from 2 to 14 inches long. fiberglass cast disadvantagesaerogarden bitter lettuce 28/12/2020. Life Cycle. Lower leaf of perennial sowthistle. wild lettuce. Margins are prickly, and it is not uncommon for it to be for... Commonly used herbicides have broken down comments about it, winter annual plant would be bluegrass prickly. In no-till soybeans and winter wheat, or have any other comments about it is distinctive with. Are prickly, and form in the sunflower family ( Asteraceae ) tolerates only light ;. 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