BARNES — NORTH AMERICAN MOSSES. 357 



542. Hypiium Columbine Kindb. — Tufts dense: stems short, very tomen- 

 tose, irregularly branching; branches short: leaves narrower than in H. 

 chrysophyllum, from narrow ovate base gradually tapering into acumen; 

 borders denticulate all around, recurved at angles; areolation often wide 

 as in Amhlystegium; costa reaching to acumen or sometimes longer; peri- 

 chaetial leaves short-acuminate: capsule generally smaller and shorter than 

 in H. ch rymphyllum, curved: lid short-apiculate; peristome dark-yellow, 

 not pale. Mac. Cat. 224.— On wet logs: British Columbia. 



543. Hypniira stellatum sub-decursivulum Kindb.— Leaves smaller, 

 decurrent, abruptly acuminate from a short ovate base; alar cells more 

 numerous: not found fruiting. Mac. Cat. 225. -Growing with Dicranum 

 scoparium on earth in a swamp, Ontario. 



544 Hypiuim polygamiim longiuerve R. & C— Leaves narrower, long 

 acuminate; costa stronger, extending into acumen: capsule paler, nar- 

 rower. Bot, Centralbl. 44: 423. 1890.— Victoria; Vancouver Island. 



545. Hypnum polygamuiu faUaciosum Lindb.— Larger, often strik- 

 ingly like H. aduncum Kneiffii in habit: costa very variable, forked, 

 longer or shorter, or wanting. Milde, Bryol. Siles. 346. 1869. 



546. Hypnum aduncum pungens H. MtilL— Leaves erect, sub-imbri- 

 cate, apical ones inrolled at the point, short acuminate or subapiculate, 

 straight or a little curved. Renauld in Husn. Muscol. Gall. 387. 1894. 

 Yellowstone Park. 



547. Hypnum aduncum attenuatum BouL— Slender, sometimes elonga- 

 ted: stem leaves short, deltoid, curved at point; costa with tendency to 

 bifurcate; branch leaves small, without auricles. Ren. I. c— Deer Lodge, 



Mont. 



548. Hypuum aduncum platypliyllum Kindb.— Leaves very broad and 

 short acuminate. Mac. Cat. 226.— On rocks in woods: Rockcliff, near Ot- 

 tawa, Can. 



549. Hypnum aduncum RoeJlii Ren.— Leaves distant, spreading, flex- 

 uous, apical oblong, then gradually long subulate acuminate, acumen 

 flexuous and twisted. Ren, ibid. 372.— Yellowstone Park, 



550. Hypnum aduncum flexile Ren.— Emergent, more slender: stems 

 flexuous: leaves usually narrower, flexuous or slightly homotropous pro- 

 longed into a twisted subula. Ren. ibid. 373.— Vancouver; Hobart, Ind. 



551. Hypnum capillil'olium Warnst.— Dioicous: stem erect (5-15 cm.), 

 pinnate: leaves secund or falciform, oblong lanceolate, gradually narrowed 

 from the base, long subulate by the excurrent costa which is strong, 

 90-140// wide at base, much thicker than the lamina; tissue delicate, basal 

 cells distinctly and long excurrent, alar dilated, forming large convex auri- 

 cles reaching almost to the costa. Ren. ibid. 379.— Idaho; Washington; 

 Vancouver Is.; British Columbia. 



