Poa sylvestris |
Poa alsodes |
|
---|---|---|
woodland bluegrass |
grove blue grass |
|
Habit | Plants perennial; not rhizomatous, not stoloniferous, loosely tufted, sometimes appearing shortly rhizomatous, loosely to densely tufted. | Plants perennial; not rhizomatous, not stoloniferous, loosely tufted. |
Culms | 30-120 cm, bases often decumbent. |
31-126 cm. |
Sheaths | closed for (1/20) 1/2-7/8 their length, terete, throats frequently ciliate near the point of fusion; ligules 0.5-2.7 mm, smooth or sparsely scabrous, truncate to obtuse; blades 0.7-5 mm wide, flat, thin, lax. |
closed for 1/2 - 7/8 their length; ligules 0.1-1.7(2.1) mm, smooth or sparsely scabrous, truncate to obtuse; blades 0.8-4.1 mm wide, flat, lax. |
Basal branching | mainly pseudointravaginal. |
mainly pseudointravaginal. |
Panicles | (6.7)9-20 cm, open, narrowly conical at maturity; nodes with (2)3-10 branches per node; branches (2)3-7 cm, spreading to eventually reflexed, straight, angled, angles several, densely scabrous, with 1-11 spikelets. |
11.4-36 cm, erect or lax, narrowly pyramidal, usually open, infrequently contracted; nodes with (2)3-5(7) branches; branches spreading, straight, angled, angles sparsely to moderately scabrous. |
Spikelets | 2.5-4.4 mm, laterally compressed; florets 2-3(4); rachilla internodes longer than (1)1.2 mm, smooth, glabrous. |
3.5-6.7 mm, laterally compressed; florets 2-4; rachilla internodes glabrous. |
Glumes | distinctly keeled, keels scabrous; lower glumes 1(3)-veined; upper glumes shorter than or subequal to the lowest lemmas; calluses webbed; lemmas 2.1-3.1 mm, broadly lanceolate, distinctly keeled, keels and marginal veins short-villous, extending to near the apices on the keels, lateral veins prominent, softly puberulent to short-villous, intercostal regions usually sparsely softly puberulent, smooth, apices obtuse to acute; palea keels softly puberulent at midlength, apices finely scabrous; anthers 1-1.8 mm. |
ovate, distinctly keeled, keels scabrous; lower glumes 1-veined; upper glumes shorter than or subequal to the lowest lemmas; calluses webbed; lemmas 2.7-4.2(5) mm, lanceolate, distinctly keeled, keels short-villous to about midlength, marginal and lateral veins glabrous, lateral veins obscure or moderately prominent, intercostal regions glabrous, smooth, apices acute; paleas glabrous or ciliolate over the keels, apices finely scabrous; anthers 0.4-0.8 mm. |
2n | = 28. |
= unknown. |
Poa sylvestris |
Poa alsodes |
|
Distribution |
AL; AR; DC; DE; FL; GA; IA; IL; IN; KS; KY; LA; MD; MI; MN; MO; MS; NC; NE; NJ; NY; OH; OK; PA; SC; SD; TN; TX; VA; WI; WV; ON
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CT; DE; IL; IN; KY; MA; MD; ME; MI; MN; NC; NH; NJ; NY; OH; PA; SC; TN; VA; VT; WI; WV; NB; NS; ON; PE; QC
|
Discussion | Poa sylvestris grows in southeastern Canada and throughout much of the eastern United States, mainly at low elevations in woodlands, especially in riparian zones. It is easily distinguished from P. wolfii (p. 514) by its smaller, more numerous spikelets and lemmas that are usually sparsely hairy between the veins. Plants from the middle Appalachian Mountains have been confused with P. paludigena (p. 572); P. sylvestris is usually larger, has more than 2 branches per panicle node, is pubescent between the lemma veins and palea keels, and has larger anthers. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Poa alsodes grows in mesic woodlands of eastern Canada and the northeastern United States, extending south to Illinois, Tennessee, and North Carolina, particularly in the Appalachian Mountains. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 24, p. 512. | FNA vol. 24. |
Parent taxa | Poaceae > subfam. Pooideae > tribe Poeae > Poa > subg. Poa > sect. Sylvestres | Poaceae > subfam. Pooideae > tribe Poeae > Poa > subg. Poa > sect. Sylvestres |
Sibling taxa | ||
Name authority | A. Gray | A. Gray |
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