Vascular Plants of the Gila Wilderness

Presented in Association with the
Western New Mexico University Department of Natural Sciences

Lactuca graminifolia Michaux var. arizonica McVaugh
(Arizona Lettuce)


Family: Asteraceae

Status: Native

Synonyms:
None

Lactuca graminifolia var. arizonica is difficult to distinguish from Lactuca pulchella without the achenes. They both can have purple ray flowers, although usually L. pulchella has more intensely colored ones. The rays on Lactuca graminifolia tend to be lighter or more yellowish. Both of these species can have linear appearing leaves that are several centimeters long and just a few millimeters wide. The achenes of Lactuca graminifolia have a single vein per side, while those of Lactuca pulchella have 5-9 obvious veins per side.
Please click on an image for a larger file.



Lactuca graminifolia var. arizonica, photo Russ Kleinman, Patrick Alexander & Gene Jercinovic, Black Range, North Percha Creek, Aug. 22, 2009



Lactuca graminifolia var. arizonica, closeup of cauline leaf, photo Russ Kleinman, Patrick Alexander & Gene Jercinovic, Black Range, North Percha Creek, Aug. 22, 2009



Lactuca graminifolia var. arizonica, raceme, photo Russ Kleinman, Patrick Alexander & Gene Jercinovic, Black Range, North Percha Creek, Aug. 22, 2009



Lactuca graminifolia var. arizonica, basal leaves, photo Russ Kleinman, Patrick Alexander & Gene Jercinovic, Black Range, North Percha Creek, Aug. 22, 2009



Lactuca graminifolia var. arizonica, achene with one distinct nerve, photo Russ Kleinman, Patrick Alexander & Gene Jercinovic, Black Range, North Percha Creek, Aug. 22, 2009



Lactuca graminifolia var. arizonica, flowerhead, photo Russ Kleinman, Burro Mtns., Deadman Cyn., Sept. 9, 2007


Back to the Index