Glyceria leptostachya |
Glyceria pulchella |
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Davy mannagrass, manna grass, narrow manna grass, slender-spike manna grass |
beautiful glyceria, graceful mannagrass, Mackenzie Valley mannagrass, slender mannagrass |
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Habit | Plants perennial. | Plants perennial. |
Culms | 50-100 (150) cm tall, 3-8 mm thick, spongy, erect to decumbent and rooting at the lower nodes. |
40-60 cm tall, 1.5-5 mm thick, erect. |
Sheaths | finely scabridulous, not or weakly keeled; ligules 4.5-12 mm, lacerate; blades 12-30 cm long, 3.5-11 mm wide, both surfaces sometimes scabridulous, adaxial surfaces sometimes sparsely papillose. |
scabridulous, not or weakly keeled; ligules 1.5-4 mm; blades 9-29 cm long, 2-7.5 mm wide, scabrous. |
Panicles | 20-40 cm long, 2.5-8 cm wide; branches 4.2-14.7 cm, appressed to ascending, with 3-8(10) spikelets; pedicels 2-5 mm, scabrous. |
15-25 cm long, 6-15(20) cm wide, open, pyramidal, nodding; branches 8-12 cm, ascending to divergent, flexuous, often smooth, with 30-40+ spikelets; pedicels 0.3-6 mm. |
Spikelets | 9-20 mm long, 0.4-3 mm wide, cylindrical and terete, except at anthesis when slightly laterally compressed, rectangular in side view, with 6-15 florets. |
3.5-6 mm long, 1.4-2.5 mm wide, about 2.5 times longer than wide, laterally compressed, oval in side view, with 3-6 florets. |
Glumes | broadly rounded to acute; lower glumes 0.6-2.1 mm; upper glumes 1.4-3.4 mm; rachilla internodes 1-1.5 mm; lemmas 2.6-4.5 mm, somewhat indented below the apical margins at maturity, veins raised, scabridulous to scabrous over and between the veins, prickles about 0.05 mm, midveins extending to within 0.1 mm of the apical margins, apices truncate to obtuse, crenulate; paleas shorter than or equaling the lemmas, keels winged, tips parallel, intercostal region truncate or rounded, sometimes exceeding the keel tips; anthers 3, 0.3-0.9 mm. |
unequal, lengths about 3 times widths, narrowing beyond midlength, veins terminating below the apices, apices acute, forming an angle of about 45°; lower glumes 1.5-2 mm; upper glumes 2-2.6 mm, erose; rachilla internodes 0.4-0.6 mm; lemmas 2.5-3.5 mm, oval in dorsal view, 7-veined, veins raised, scabridulous, apices broadly acute to obtuse, prow-shaped; paleas from shorter than to equaling the lemmas, lengths 3-3.5 times widths, keels not winged, tips incurved, apices narrowly notched between the keels; anthers 2, 0.5-0.9 mm. |
Caryopses | about 1 mm. |
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2n | = 40. |
= unknown. |
Glyceria leptostachya |
Glyceria pulchella |
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Distribution |
AK; CA; OR; WA; BC
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AK; AB; BC; MB; NT; SK; YT |
Discussion | Glyceria leptostachya grows in swamps and along the margins of streams and lakes, on the western side of the coastal mountains from southern Alaska to San Francisco Bay. It is similar to the European Glyceria notata, differing primarily in its tendency to have fewer spikelets [3-8(10) vs. 5-15(19)] on its branches. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Glyceria pulchella grows in marshes, muskegs, ponds, and ditches, from central Alaska and the Northwest Territories to southern British Columbia and central Manitoba. In overall aspect, G. pulchella resembles G. striata and G. elata. It differs in having somewhat stiffer and straighter panicle branches, in addition to larger spikelets and florets. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 24, p. 85. | FNA vol. 24, p. 77. |
Parent taxa | Poaceae > subfam. Pooideae > tribe Meliceae > Glyceria > sect. Glyceria | Poaceae > subfam. Pooideae > tribe Meliceae > Glyceria > sect. Striatae |
Sibling taxa | ||
Synonyms | Panicularia leptostachya, Panicularia davyi | |
Name authority | Buckley | (Nash) K. Schum. |
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