Thinopyrum ponticum
Eurasian quack grass, rush wheatgrass, tall wheatgrass
50-200 cm, glabrous;
lowest internode plus sheath about 3.5 mm thick.
ciliate on the lower margins;
auricles 0.2-1.5 mm;
ligules 0.3-1.5 mm;
blades 2-6.5 mm wide, generally convolute, adaxial surfaces with 1-8 ribs, ribs rounded, prominent, spinulose, margins usually thinner than the ribs.
10-42 cm, erect;
internodes 9-19 mm;
rachises glabrous, not disarticulating at maturity.
13-30 mm, with 6-12 florets;
disarticulation beneath the florets.
oblong, glabrous, 5-9-veined, midveins about equal in length and prominence to the lateral veins, margins about 0.5 mm wide, hyaline, apices truncate;
lower glumes 6.5-10 mm, midveins occasionally scabrous distally;
upper glumes 7-10 mm;
lemmas 9-12 mm, glabrous;
paleas 7.5-11 mm, keeled, keels ciliate;
anthers 4-6 mm.
= 69, 70.
Thinopyrum ponticum
Thinopyrum ponticum is native to southern Europe and western Asia. In its native range, it grows in dry and/or saline soils. In the Flora region, T. ponticum is planted along roadsides for soil stabilization, and is spreading naturally in cooler areas because of its tolerance of the saline conditions caused by salting roads in winter. It is sometimes treated as a subspecies of T. elongatum (Host) D.R. Dewey, a diploid species that grows in maritime regions of western Europe.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
- Local floras:
BC, 
CA, 
OR, 
WA - Local Web sites: CalFlora, CalPhotos,
Flora NW, 
IL Wildflowers, 
KS Wildflowers, 
MO Plants, 
PNW Herbaria 
WildflowerSearch
iNaturalist (observations)
USDA Plants Database- LBJ Wildflower Center
- SEINet
- Plants of the World Online
- Encyclopedia of Life
- Wikipedia
- Google Image Search
