246 Wheldon : Key to the Harpidioid Hypna. 



often reddish (L. vernicosa). More robust, less rigid, green to brownish 

 (10-25 cm. high) : leaves much larger (3). 



3. Erect, stout and much branched : leaves dense, falcate secund 

 (L. vernicosa var. majiis). Floating, flaccid, and elongate, with few 

 branches : leaves distant, less falcate (L. vernicosa var. iurgida). 



4. Dioicous or sterile, hardly glossy : cells in basal half of leaf 

 partly parenchymatous (5). Monoicous, with metallic gloss : cells 

 vermicular and prosenchymatous almost to base (12). 



5. Leaves strongly plicate, usually reddish at base (L. pelhtcidum). 

 Leaves not or hardly plicate (6). 



6. YellowLsh or greenish, rarely rufous : leaves often undulate when 

 dry : leaf points rather short : cells rather thin walled, ten to fifteen times 

 as long as wide or less, a few rows at base parenchymatous and wider (7). 

 Dingy brownish green to brownish red : leaves larger, with a longer, 

 often twisted and recurved subule : suprabasilar cells par and prosen- 

 chymatous intermixed (11). 



7. Ochreous, tall and often pinnate : leaves rather rigidly falcate- 

 secund, not crisped when dry (L. intermedia f. falcata). Leaves often 

 undulate and crisped above when dry, less regularly falcate-secund (8). 



8. Green or yellowish to brownish green (8). Purplish, or dark 

 fuscous (10). 



9. Stems moderate, rather dense leaved (L. intermedia f. vera). 

 Stems slender, elongate, leaves distant (L. intermedia f. remotiusciila). 



10. Stems slender : leaves of a rich purple red (L. intermedia f. 

 purpurea). Robust, fuscous above, soon passing below to fuscous-black 



(L. intermedia f. nigrescens) . 



11. Tall and pinnate, brownish green to reddish : leaves dense, 

 their points here and there patent and twisted (L. intermedia var. Cossoni). 

 Elongate and slencjer, subsimple, spadiceous to yellowish green : stems 

 wiry, often denuded below : leaves distant, with very long fine points, 

 subcircinate, rarely at times spreading towards the apices (L. intermedia 

 var. Cossoni i. falcata). 



12. In soft fuscous-green, passing to rufous purple or blackish tufts : 

 leaves large, densely crowded (L. revolvens f. typica). Slender, elongate, 

 pinnate, ochreous to pale yellow : leaves smaller, rather distant. 



(L. revolvens f. flavescens). 



(C) Sanionia Loeske. Emend. Wlield. 

 Harpidia distincta Sanio. pp. Uncinatus-Griippe Warnst. 



Mesophyte to subxerophytc. Stems frequently rhizinose ; cortical 

 cells dilated. Leaves elongate, plicate, with a relatively narrow nerve 

 reaching above halfway. Areolation delicate, cells long, flexuose ; the 

 basal angles forming rather small but distinct hyaline auricles. 

 Perichaetial leaves very long, appressed, plicate. Capsule annulate. 

 Inflorescence autoicous. 



Loeske, following Sanio, includes Hypnum fertile here. Us athnities 

 appear to be with Stereodon rather than Sanionia, and the definition 

 of the genus given above excludes it. 



1. Robust to very robust, erect, simple or slightly irregularly 

 branched : leaves from a broad erect oblong base, nearly straight, or the 

 acuminate points only recurved, entire, or feebly denticulate above : 

 capsule erect, or inclined and feebly curved (2). Less robust, sub- 

 pinnately branched : leaves narrower, more strongly acuminate, falcate- 

 secund, with long often loriform subulate points : capsule arcuate, 

 except in var. alpinuni (3). 



2. Leaves densely imbricate, erect, points of stems and branches 

 straight (5. orthothecioides i. orthophylla). Leaves from an erect base, 

 subfalcate-secund, cuspidate points of stems and branches curved 



(S. orthothecioides f. subfalcata. 



Naturalist 



