Hygroamblystegium varium
amblystegium moss, willow feather-moss
leaves ovate-lanceolate to ovate-triangular;
basal laminal cells short-rectangular, often pigmented, walls firm, eporose, region weakly differentiated;
medial cells 2–7:1.
dark red, 1.2–2.2 cm.
constricted below mouth when dry;
exothecial cells long- to short-rectangular, 30–105 × 18–35 µm, walls firm, not collenchymatous;
annulus separating, 2–4-seriate, cell walls thin;
operculum acute, apiculate, or rostrate;
exostome teeth yellow-brown, external surface cross striolate basally, coarsely papillose distally, internal surface trabeculate;
endostome basal membrane high, segments not or narrowly perforate.
finely papillose.
Hygroamblystegium varium
Subspecies 2 (2 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Plants small to moderately large; stems to 10 cm; costae narrower than 100 µm at base, to mid leaf, percurrent, or rarely short-excurrent; lamina 1-stratose. | subsp. varium |
1. Plants extremely large; stems to 15 cm; costae 110-140 µm wide at base, excurrent; lamina sometimes partially 2-stratose, especially at base near costa. | subsp. noterophilum |
BC
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WildflowerSearch
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USDA Plants Database
