Deschampsia flexuosa
Deschampsia danthonioides
annual hairgrass
mostly cauline, filiform;
ligules (0.5)1.5– 3(4.7)mm; acute to acuminate;
blades 0.3– 1.5 mm wide; involute to flat.
5–15(25) cm;
branches appressed when young, spreading when mature.
4–9 mm.
subequal, 5–8.5 mm; acute, exceeding the distal floret, with 0–3 veins, glabrous to scabridulous.
2–3(3.5)mm; smooth; shiny;
lemma awns (4)5–9(10.5)mm, arising near base to about middle of lemma, strongly bent, twisted at base.
0.3– 0.5 mm.
=26.
Deschampsia flexuosa
Deschampsia danthonioides
Vernal pools, scablands, stream banks, disturbed areas, often sites that are wet in spring. 50–2100m. All ecoregions except Est. CA, ID, NV, WA; north to British Columbia, northeast to MT, south to Mexico; ME, NY, OH; South America. Native.
Annual hairgrass is very similar to Ventenata dubia, another delicate annual with open panicles. Ventenata dubia glumes have more veins and longer lemmas. Additionally, one lemma of each spikelet has an awn that is terminal and straight, whereas the awn of the other lemma is dorsal and bent. Young D. danthonioides with unexpanded inflorescences can be confused with D. elongata, which has a dense tuft of basal leaves.
Barbara Wilson, Richard Brainerd, Nick Otting
- Local floras:
BC, 
CA, 
OR, 
WA - Local Web sites: CalFlora, CalPhotos,
Flora NW, 
PNW Herbaria 
WildflowerSearch
iNaturalist (observations)
USDA Plants Database- LBJ Wildflower Center
- SEINet
- Plants of the World Online
- Encyclopedia of Life
- Wikipedia
- Google Image Search
