HYPNACE^.] 50 [Amblystegium. 



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, 

 gradually 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. /3. submersum Schimp. 



Stems very long, 612 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, hyaline. 



SYN. Hypnum fluitans Var. submersum SCHIMP. Bry. eur. REN. in HUSN. Muse. gall. 382. 



Hyp.fluitans c). amphibium f. submersum SANIO Bechreib. 57. 

 HAB. In deep pools on heaths. 



Var. y. Jeanbernati 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. 



SYN. Hypnum ftuitans Var. Jeanbernati REN. Revis. de la sect. Harbidium, 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 



fluitans. 



Var. 8. paludosum 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, 

 hyaline cells large, reaching nerve. 



