Photographer: Emmet J. Judziewicz
Lactuca serriola L.
compass-plant, prickly lettuce
Lactuca: name for "milk"
serriola: either in ranks, or pertaining to salad, being one form of an old name for chicory
|Status: ||Introduced - naturalized|
|Plant: ||erect, annual/biennial, 1'-5' tall forb with milky juice; stems leafy, smooth except for prickles at the bottom|
|Flower: ||head 3/8" wide with 18-24 yellow rays, drying to a bluish-white; inflorescence with many heads in a long, conical, loosely-branched cluster; blooms July-Sept.|
|Fruit:||dry seed with several obvious lines on both sides|
|Leaf:||varying from entire, toothed, to pinnately-divided with narrow to arrow-shaped base, spiny edges and midrib|
|Habitat: ||disturbed sites, fields|