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|Family: Poaceae (Gramineae)||View Description||Dichotomous Key|
|Genus: Hilaria||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Hilaria rigida (Thurb.) Scribn.
Habit: Plant 3.5--10 dm, branched above base, generally bush-like. Stem: 1.5--3.5 mm diam at base; node hairs curly. Leaf: generally cauline, generally sparsely to densely tomentose, especially near and sometimes overlapping ligule; ligule membrane < 1 mm, lateral teeth 0; blade < 10 cm, 2--4 mm wide. Inflorescence: 4--10 cm; spikelet clusters 7--11 mm. Central Spikelet: glume margin hairs 0.5--3 mm; lower lemma tip sometimes 4-lobed, awns 3, +- from sinuses, central awn 2--5.5 mm.Lateral Spikelet: lower glume with 1+ subsidiary lobes, or larger lobe tip fringed, awns 2--4; upper glume tip with 2+ lobes or fringed, awns 1--3, 0.4--2.5 mm, margin hairs 0.5--2 mm; lemma tip 2-lobed, awn 1 +- from sinus, 0.4--2 mm, margin hairs 0.2--1 mm.Chromosomes: 2n=18,36,+-108.
Ecology: Common. Dry, open, sandy to rocky slopes, flats, and washes, sand dunes, scrub, woodland; Elevation: < 1600 m. Bioregional Distribution: PR, e&s DMoj, DSon; Distribution Outside California: to Utah, northwestern Mexico. Flowering Time: All year Note: Important forage; some plants from eastern DMoj and Ord Mtn (San Bernardino Co.), with +- straight internode hairs, intermediate to Hilaria jamesii.
Synonyms: Pleuraphis rigida Thurb.
Unabridged Note: Expanded author citation: Hilaria rigida (Thurb.) Benth. ex Scribn.
eFlora Treatment Author: J. Travis Columbus
Jepson Online Interchange
Previous taxon: Hilaria jamesii
Next taxon: Holcus
Citation for this treatment: J. Travis Columbus 2016. Hilaria rigida, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=28274, accessed on February 10, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 10, 2016.