104 HYPNACEAE 



7 — Stems reddish; capsules cylindric, little curved and suberect. . .imponens 



Stems not noticeably reddish; capsules curved and inclined 8 



8 — Plants small, yellowish ; capsules not plicate fertile 



Plants larger, dark green; capsules plicate when dry ciirvifolium 



9 — Leaves in two rows, appearing more or less complanate; capsules 



curved and inclined; cilia of peristome one or two io 



Leaves not appearing complanate; capsules erect and symmetric or 



nearly so; cilia none or rudimentary tenuirostris 



io — Plants larger, bright glossy yellow-green; urn of capsule twice the 



length of operculum recurvans 



Plants smaller, usually darker green, growing at high altitudes; urn 



about the length of operculum laxepatuliim 



II — Plants very large and beautifully plumosely branched; leaves plicate. 



Crista-castrensis 



Plants smaller, less plumose; leaves not plicate 12 



12 — Stems reddish; quadrate alar cells not very numerous imponens 



Stems not noticeably reddish; quadrate alar cells numerous 13 



13 — Leaves cordate at base molluscum 



Leaves not cordate at base 14 



14 — Leaves entire or serrulate above cupressiforme 



Leaves serrate above, serrulate nearly or quite to base 15 



15 — Capsules 2.5-3 mm. long, curved and somewhat contracted below 



the mouth when dry reptile 



Capsules 1-1. 5 mm. long, nearly symmetric and not contracted below 

 the mouth; plants of high altitudes usually pallescens 



H. crista-castrensis L. "On the ground and decaying logs 

 in deep damp woods and swamps, Closter, N. J., rare," Muse. 

 App. 434, Cold Spring (27453)!! Summer-autumn. 



H. cupressiforme L. "On rocks and roots of trees, N. J.," 

 Muse. App. 422, 423, 421 (Closter); "Not infrequent." Flora 

 L. Id.; Orient, L. Id., Latham; Bard Ave., Silver Lake and 

 New Dorp, S. Id., E. G. B., Bx! (Some of the S. Id. material 

 looks doubtful.) 



Var. resupinatum (Wils.) Sch. "On dry rocks, N. J.," 

 Muse. App. 420; Orient, Latham. 



H. curvifolium Hedw. Orient, L. Id., Latham; near Hugue- 

 not, S. Id., Hollick & Britton, Bx!; New Haven, etc., Bry. Ct., 

 Muse. App. 424 is H. paiientiae, also much of the material in 

 the local collection at the Bronx. Spring. 



H. fertile Sendt. Oxford, Bry. Ct. 



