Achnatherum parishii subsp. depauperatum

(M.E. Jones) Barkworth
Common names: Low needlegrass
Synonyms: Stipa coronata depauperata
Found in FNA Volume 24. Treatment on page 129.
FNA24 P47 Achnatherum pg 128.jpeg
Culms 14-35 cm tall, 0.8-1.7 mm thick, glabrous. Basal sheath margins glabrous or hairy distaily, hairs to 0.5 mm; blades 4-15 cm long, 1-2.5 mm wide, usually 0.5-1.5 mm in diameter and tightly convolute, conspicuously arcuate distaily, abaxial surfaces smooth, glabrous, adaxial surfaces scabrous. Panicles 7-12 cm long, 1.5-2.5 cm wide. Florets 4.8-6 mm; paleas densely hairy between the veins, some hairs as long as those on the lemmas; awns 10-17 mm; anthers 2.3-2.8 mm. Caryopses 3-4 mm, fusiform. 2n = unknown.

Discussion

Achnatherum parishii subsp. depauperatum grows in gravel and on rocky slopes, in juniper and mixed desert shrub associations, from central Nevada to western Utah. It differs from A. webberi in its persistent awns and thicker leaves that tend to curl when dry, and from A. parishii subsp. parishii in its smaller stature, glabrous or shortly hairy sheath margins, and densely hairy paleas.

References

None.

AuthorMary E. Barkworth +
Common nameLow needlegrass +
ReferenceNone +
SynonymStipa coronata depauperata +
Taxon nameAchnatherum parishii subsp. depauperatum +
Taxon parentAchnatherum parishii +
Taxon ranksubspecies +
VolumeVolume 24 +