Hypnace^.] 50 [Amhlystegium. 



Autoicous ; in large submersed or floating tufts, soft, lax, yellowish- 

 green or brownish with a silky gloss. Stems long slender, repeatedly 

 dichotomous, densely or laxly pinnate. Cauline leaves remote, flexuoso- 

 patulous, only the apical hooked, elongate-lanceolate, narrow at base, 

 graduall}- tapering into a long and very fine acumen, faintly denticulate 

 at base and apex; ramuline narrower, secund or rarely falcate, all 

 nerved nearly to apex, concave, not sulcate; cells very narrow and 

 thin, long and rhomboid, hyaline and dilated at subdecurrent angles. 

 Perichaetial bracts closely imbricated, nerved, not sulcate, innermost 

 long and narrowly acuminate. Capsule on a very long seta, from an 

 erect base, oblong, incurved, soft, ferruginous brown ; annulus none, 

 peristome teeth short, lanceolate-subulate, yellowish with a hyaline 

 border, processes entire, cilia smooth, often imperfect. Male infl. 

 numerous. 



Hab. — Pools and bogs, common. Fr. 6 — 7. 



Var. p. submersum Schimp. 



Stems very long, 6 — 12 in., floating in deep water, in soft pale green 

 tufts, with few short branches. Leaves distant, secund, falcate or patulous, 

 broadly oblong-lanceolate ; nerved to f length, the acumen shorter, serrate at 

 apex, basal cells lax to the nerve, but little dilated, hyaUne. 



Syn. — Hypnum fluitans Var. submersum Schimp. Bry. eur. Ren. in HusN. Muse. gall. 382. 



Hyp.fluitans S. amphibium f. submersum Sanio Bechreib. 57. 

 Hab. — In deep pools on heaths. 



Var. y. Jeanbemati Renauld. 



In pale green tufts ; leaves slightly secund, oblong-lanceolate, shortly 

 acuminate, obsoletely denticulate, nerved for f the length ; upper cells very 

 long, the angular but little dilated. 



Sy^.— Hypnum fluitans Var. Jeanbemati Ren. Revis. de la sect. Harpidium, et in HusN. 

 Muse. gall. 380. 



Hab. — Whernside, Yorks. (Dixon 1896) ! ! 



A tall slender form of a bright green colour, and remarkable for the short 

 broad acumen, but having the narrow linear base to the leaf as in typical 



/luitans. 



Var. 8. palndosnm Sanio. 



Stems elongated, slender, pale green above, fuscous below ; pinnate with 

 short acute arched branches; leaves lax subsecund, curved or falcate, 

 oblongo- or lineal-lanceolate, with a very long flexuose slender acumen, 

 hyaUne cells large, reaching nerve. 



