Poa bulbosa |
Poa bulbosa subsp. bulbosa |
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bulbous blue grass |
bulbous blue grass |
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Habit | Plants perennial; densely tufted, not rhizomatous, not stoloniferous. | |||||
Culms | 15-60 cm, erect or spreading, bases bulbous. |
15-25 cm. |
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Sheaths | closed for about 1/4 their length, terete, lowest sheaths with swollen bases; ligules 1-3 mm, smooth or scabrous, apices obtuse to acute; blades 1-2.5 mm wide, flat, thin, lax, soon withering. |
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Basal branching | intravaginal. |
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Panicles | 3-12 cm, ovoid; nodes with 2-5 branches; branches ascending to spreading, terete, usually smooth or sparsely scabrous, infrequently moderately scabrous. |
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Spikelets | 3-5 mm, laterally compressed, usually bulbiferous; florets 3-7, the basal floret, and sometimes additional florets, normal; rachilla internodes smooth, glabrous. |
not bulbiferous; florets all normal. |
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Glumes | keeled, keels scabrous; lower glumes 3-veined; upper glumes shorter than or subequal to the lowest lemmas; calluses webbed or glabrous; lemmas 3-4 mm, lanceolate, keeled, glabrous or the keels and marginal veins short- to long-villous, intercostal regions glabrous or softly puberulent, apices acute; paleas scabrous, keels often softly puberulent at midlength; anthers 1.2-1.5 mm and functional, sometimes aborted late in development, sometimes not developed. |
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Calluses | webbed; lemmas short-villous on the keels and marginal veins, intercostal regions sparsely softly puberulent; anthers 1.2-1.5 mm. |
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2n | = 14, 21, 28, 39, 42, 45. |
= unknown. |
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Poa bulbosa |
Poa bulbosa subsp. bulbosa |
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Distribution |
AR; AZ; CA; CO; CT; DE; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; MI; MN; MO; MT; NC; ND; NE; NJ; NM; NV; NY; OH; OK; OR; PA; SD; TN; TX; UT; VA; VT; WA; WI; WV; WY
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Discussion | Poa bulbosa is a European species that is now established in the Flora region. In southern Europe and the Middle East, it is considered an important early spring forage. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Poa bulbosa subsp. bulbosa is common in its native Europe. It is uncommon in the Flora region, with the only known collections being from Drake, Butler, and Preble counties, Ohio. Whether these collections represent independent introductions or reversion to reproduction by seed is not known. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 24, p. 516. | FNA vol. 24, p. 516. | ||||
Parent taxa | Poaceae > subfam. Pooideae > tribe Poeae > Poa > subg. Poa > sect. Arenariae | Poaceae > subfam. Pooideae > tribe Poeae > Poa > subg. Poa > sect. Arenariae > Poa bulbosa | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | L. | unknown | ||||
Web links |
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