|Scientific Name||Lactuca serriola||USDA PLANTS Symbol||LASE|
|Common Name||Prickly Lettuce||ITIS Taxonomic Serial No.||36608|
|Description||Life zones and habitat: Plains to montane (3500 to 8500 ft.); fields, waste places, disturbed areas, and roadsides.
Plant: Tall, erect biennial, 1-5 feet high, stout stem and milky sap.
Leaves: Alternate, prickly leaves, usually clasping and oblanceolate to obovate in shape; lower leaves deeply pinnately-lobed.
Inflorescence: Large panicles or corymbs of many, often 100 or more, composite yellow blossoms in open clusters, each about 1/2-inch across, with 13 to 27 rays only (no disk florets); involucre about 1/2 inch long with 3 rows of overlapping bracts.
Bloom Period: July to October.
References: "Flora of Colorado" by Jennifer Ackerfield, American Southwest and SEINet.
|BONAP Distribution Map
Map Color Key
© Tom Lebsack 2023
Banner photo: Ten Mile Range and Rhodiola integrifolia (King’s Crown) in Summit County