— True Prickly Lettuce (Lactuca scariola). Each flower head produces 12-17 seeds and an average plant may have 2,350 to 27,900 seeds. Foliage: Cauline foliage is pinnately lobed, thick and leathery, and with prickles on the margins and midrib (underside). prickly lettuce, compass weed, compass plant. Prickly Lettuce, Lactuca Serriola L., a native to the Mediterranean region is. Plants establish a taproot upon sprouting. 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. Sowthistle, Annual Sonchus oleraceus; Herbicidal Control Options Other common names for prickly lettuce include China lettuce, compass plant, and wild lettuce. 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. Stem sometimes bristly. Basal rosettes grow flat to the ground in winter; in spring, they take on a more … 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 Leaf margins are prickly, and prickles also run along the central vein. Prickly lettuce (Lactuca serriola) can be a summer annual or biennial. Our ancestors used lettuce to treat anxiety, insomnia, and neurosis. Has a taproot. It does have herbicide resistance issues plus it is a late germinating weed that comes after commonly used herbicides have broken down. Excessive sprinkler irrigation (more than 2 inches) will leach pronamide too deeply in the soil to be effective for weed control. Identification Notes. 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 These leaves can be lobed or unlobed and are egg-shaped. Highly variable in height; can grow tup 7' but usually much shorter. Characteristics Prickly lettuce may be mistaken for dandelion, at the rosette stage, or for sow-thistles at any stage. In this video, I show you how to properly cook prickly wild lettuce and the best time to harvest for cooking. Which happens depends both on timing of seed germination, and conditions. These plants start to germinate spring and most of them will not finish their life cycle until early or late summer. (Figure 1) The French common name for prickly lettuce is "laitue scariole", which derives from its scientific name, Lactuca serriola or La… Leaves are deeply lobed, and clasp the base of the stem. 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. Which happens depends both on timing of seed germination, and conditions. The leaves are dark green, and the veins are pale white. The woody stems of this plant are hollow, and form in the middle of a basal rosette of leaves. prickly lettuce: USDA PLANTS Symbol: LASE U.S. Nativity: Exotic Habit: Forbs/Herbs Lactuca serriola L. Jump to: Images | Distribution Maps | Sources. Produces wind-dispersed seeds; plants die after setting seed. Leaves. Lettuce leaves contain small amounts of opiate-like substance, lactucarium("lettuce opium"), which is a mild sedative. 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. Multimedia. 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 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. no ‘eye’ to the daisy). The woody stems of this plant are hollow, and form in the middle of a basal rosette of leaves. Terms of Service apply. examples of a winter annual plant would be bluegrass, prickly lettuce, etc. The leaf shape is distinctive, with the indentation between lobes forming a "C" shape. Prickly lettuce is a common winter annual or biennial broadleaf plant in California and is found throughout up to 6600 feet (2000 m). 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. Leaves are alternate and clasping the stem at the base, variably lobed, ranging from unlobed to deeply cut with many lobes. 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. Habitat. Prickly Lettuce Lactuca serriola L. collect. In terms of its ecological niche, it is probably most similar to L. canadensis, which grows taller and is slightly more shade-tolerant. — Prickly Lettuce (Lactuca scariola, var. When the leaves have been damaged, they ooze latex. 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). Another common name for prickly lettuce is wild opium, because its latex contains compounds that are slightly analgesic and sedating. 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. 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. Lactuca serriola is closely related to cultivated lettuce (Lactuca sativa), and can hybridize with it. 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. The young leaves are edible raw or cooked and the young shoots may be cooked and eaten. Habit. Family Name: Asteraceae (Compositae) - Aster or Sunflower Family. 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. 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. Life Cycle. Synonyms (former Scientific Names): Lactuca scariola . Winter or summer annual reproducing only by seed. Leaves are deeply lobed, and clasp the base of the stem. Prickly lettuce has jagged leaves that are easy to spot. wild lettuce. 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. Will flower from June to late autumn. 375. 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. Photos courtesy Peter M. Dziuk taken at numerous locations in the seven county Metro area and the Dakotas. upright, tall, usually prickly near ground, leafy, hollow. Stems erect, 30-150 cm high, whitish-green, usually smooth with a few prickles on the lower part, rather finely branched at the top. There may be a few prickles toward its base. Scientific Name: Lactuca serriola L., syn, Lactuca scariola. Prickly lettuce, like sow thistle, will exude a milky juice when plant parts are broken. 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