Poa bulbosa |
Poa marcida |
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bulbous blue grass |
weeping bluegrass, withered blue grass |
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Habit | Plants perennial; densely tufted, not rhizomatous, not stoloniferous. | Plants perennial; not rhizomatous, not stoloniferous, sometimes shortly rhizomatous, loosely to densely tufted. | ||||
Culms | 15-60 cm, erect or spreading, bases bulbous. |
20-80 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. |
closed for at least 9/10 their length; ligules 0.5-2 mm, smooth, truncate; blades 1.5-5 mm wide, flat, lax. |
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Basal branching | intravaginal. |
mainly pseudointravaginal. |
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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. |
6-22 cm, lax, narrowly lanceoloid, sparse; nodes with 1-3 branches; branches ascending, lax, angled, angles 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. |
3.5-7 mm laterally compressed; florets (1)2(4); rachilla internodes about 1 mm, smooth, glabrous. |
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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. |
distinctly keeled, keels scabrous; lower glumes 1-veined; upper glumes shorter than or subequal to the lowest lemmas; calluses webbed, webs sparse; lemmas 3.2-5 mm, narrowly lanceolate, distinctly keeled, glabrous, acuminate; palea keels scabrous, sometimes sparsely so; anthers 0.5-1.2 mm. |
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2n | = 14, 21, 28, 39, 42, 45. |
= unknown. |
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Poa bulbosa |
Poa marcida |
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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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OR; WA; BC |
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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 marcida is an uncommon endemic of breaks in rich, mesic, generally old growth forests of the Pacific coast, from Vancouver Island through the western foothills of the northern Cascade Mountains to central Oregon. It differs from P. saltuensis (p. 510) in its closed sheaths and attenuate lemmas. (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. 512. | ||||
Parent taxa | Poaceae > subfam. Pooideae > tribe Poeae > Poa > subg. Poa > sect. Arenariae | Poaceae > subfam. Pooideae > tribe Poeae > Poa > subg. Poa > sect. Sylvestres | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | L. | Hitchc. | ||||
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