Hordeum intercedens |
Hordeum murinum |
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bobtail barley, vernal barley |
bulbous barley, charming barley (ssp. leporinum), foxtail barley, hare barley, mouse barley, mouse barley (ssp. murinum), seagreen barley (ssp. glaucum), smooth barley, wall barley |
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Habit | Plants annual; loosely tufted. | Plants annual; loosely tufted. | ||||||||
Culms | 5-40 cm, erect to geniculate; nodes usually pubescent. |
to 110 cm, usually erect, sometimes almost prostrate; nodes glabrous. |
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Sheaths | with stripes of hairs; ligules 0.3-0.8 mm; auricles usually absent, shorter than 2 mm if present; blades to 9 cm long, to 4 mm wide, both surfaces sparsely to densely hairy, hairs spreading. |
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Spikes | 2.5-6.2 cm long, 4-6 mm wide, often partially enclosed at maturity, pale green. |
3-8 cm long, 7-16 mm wide, pale green to distinctly reddish, especially the awns; rachises disarticulating at maturity. |
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Glumes | straight, usually slightly divergent at maturity. |
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Central | spikelets: glumes to 17 mm long, to 0.8 mm wide basally, distinctly flattened near the base; lemmas 4.5-7.5 mm, usually sparsely pubescent towards the base, glabrous distally, awned, awns 5.6-9.8 mm, often slightly divergent at maturity; anthers 0.6-1.2 mm. |
spikelets sessile, florets sessile or pedicellate, pedicels to 2 mm; glumes 11-25 mm long, 0.8-1.8 mm wide, flattened, margins usually distinctly ciliate; lemmas 8-14 mm long, to 2 mm wide, more or less smooth, awned, awns 20-40 mm; lodicules glabrous or with 1+ cilia; anthers 0.2-3.2 mm, gray to yellow, sometimes with purple spots. |
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Lateral | spikelets usually sterile; glumes to 17.5 mm, distinctly flattened near the base; lemmas 1.7-4.4 mm, blunt to acute, usually unawned, rarely awned, awns to 1.2 mm. |
spikelets staminate, floret sessile; glumes flattened, margins ciliate; lemmas 8-15 mm, awned, awns 20-50 mm; paleas 8-15 mm; rachillas 2.5-6.5 mm, slender or gibbous, yellow. |
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Lower | sheaths often completely surrounding the culms, glabrous or somewhat pilose; ligules 1-4 mm; auricles to 8 mm, well developed even on the upper leaves; blades to 28 cm, usually flat, occasionally with involute margins, glabrous or sparsely pilose, sometimes scabrous. |
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2n | = 14. |
= 14, 28, 42. |
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Hordeum intercedens |
Hordeum murinum |
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Distribution |
CA
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AL; AZ; CA; CO; CT; DC; DE; GA; ID; MA; MD; ME; MT; NC; NJ; NM; NV; NY; OK; OR; PA; SC; TX; UT; VA; WA; WY; HI; AB; BC
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Discussion | Hordeum intercedens grows in vernal pools and flooded, often saline river beds and alkaline flats. It is restricted to southwestern California, including some of the coastal islands, and northwestern Baja California, Mexico. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Hordeum murinum is native to Eurasia, where it is a common weed in areas of human disturbance. It is thought to have originated around seasides, sandy riverbanks, and animal watering holes. It is now an established weed in the southwestern Flora region and other scattered locations. The records in Alaska are from the Anchorage area. Prostrate plants are associated with grazing. Three subspecies are recognized. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 24, p. 242. | FNA vol. 24, p. 250. | ||||||||
Parent taxa | Poaceae > subfam. Pooideae > tribe Triticeae > Hordeum | Poaceae > subfam. Pooideae > tribe Triticeae > Hordeum | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Name authority | Nevski | L. | ||||||||
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