BARNES — NORTH AMERICAN MOSSES. 365 



ulate; alar cells large, reaching to costa which is simple and prolonged 

 above middle: inflorescence monoicous: capsules not found. Mac. Cat. 243. 

 — On'rocks in streams: British Columbia. 



594. Hypnum purnm^li. — Stems 8-15 cm., depressed or ascending, 

 simply pinnate or with pinnate branches, delicate, julaceous; tufts large, 

 sof t,'often depressed, pale green: leaves imbricate, very concave, decurrent, 

 denticulate all around, plicate; stem leaves broad ovate, strongly con- 

 tracted at base, apex round with an erect or curved apiculus; branch leaves 

 narrower, oblong; cells of basal angles qiiadrate or rectangular, pale green, 

 forming] small auricles; middle cells linear flexuous; inner perichastial 

 1 eaves lanceolate, long acuminate, costa: dioicous: capsule horizontal, ob- 

 long or sub-cylindric; lid conic, pointed; annulus double; teeth orange, seg- 

 ments wide open along keel. Husnot, Muse. Gall. 419. — Miquelon Is. 



595. Hypnum stramineuM laxifolium C. Miill. Nodesoriptionof this 

 variety is at hand. — Greenland. 



596. Hypnum straminenm compactum Milde.— Tufts thick, stems 

 stronger and shorter, below (with leaves) yellow-brown: leaves shorter and 

 broader. Bryol. Siles. 370. 1869.— Greenland. 



597. Hypnum stramineum exiguum Ren. — Stems depressed, short, 

 very delicate, filiform: leaves distant, very small. Fl. Miq. 57.— Miquelon 

 Island. 



598. Hypnum occidentale S. & L.— Plants densely cespitose; tufts intri- 

 cate, depressed, bright green, sub-sericeous: stem much divided, filiform, 

 sub-repent; branches prostrate, strongly branched, branchlets filiform or 

 attenuate or thickish julaceous; leaves erect spreading when moist, imbri- 

 cate when dry, ovate or Ungulate, rather obtuse, concave, border denticu- 

 late above; costa thick, reaching middle; cells minute, oval-rhombic, alar 

 quadrate, smaller; perichaetial leaves erect from a sheathing base, upper 

 broadly ovate, uppermost lanceolate, obtusely short acuminate, reflexed: 

 dioicous: capsule oblong-ovate to oblong-cylindric, inclined, sub-cernuous, 

 exannulate, dilated below mouth when empty; seta smooth, scarcely 1 inch 

 long'sub-cygneous; peristome teeth broadly lamellose within, segments en- 

 tire, punctulate, cilia 2, shorter; lid long conic, acute, shortly oblique ros- 

 trate. SuU. Icon. Muse. Suppl. 105. pi. 81. 1874.— Roots and base of 

 trees, Oregon. 



599. Hypnum scorpioides Miquelonense R. & C. — Robust, submersed; 

 tufts black, apical leaves only golden yellow passing to red; stems 15-35 

 cm.: leaves of principal branches sub-imbricate, slightly secund, bluntly 

 acuminate; leaves of secondary branches rather crowded, erect, falciform 

 and flexuous at point, narrower, oblong, long and narrowly acuminate, 

 needle-pointed, sometimes toothed at apex; costa sometimes short bifur- 

 cate, sometimes single, feeble, reaching or surpassing middle; median 



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