[3 21 ] THE MOSSES OF ALASKA 2 8l 



0.5-0.6 lata, sat longe acuminata costaque excurrente cuspidata, apice 

 parce et acute denticulata, marginibus saepius limbatis, limbo inferne 

 angusto, piano, superne crassiore, distincto, interdum subreflexo, 

 rarius deficiente, costa angusta, basi 50-55 /JL crassa, sensim attenuate, 

 cellulis inferioribus rectangulis, 50-65 p. longis, 17-22 latis, mediis 

 oblongo-hexagonis, 45-55 p. longis, 13 latis, marginalibus angus- 

 tioribus linearibus. Capsula in pedicello rubello, 2.5-3 cen tim. 

 longo, nutans vel pendula, ovato-pyriformis, collo attenuate instructa, 

 3-4 millim. longa, operculo convexo. Exostomii dentes pallide fer- 

 ruginei. Endostomium perfectum, ciliis appendiculatis. Planta 

 mascula brevis, gemmiformis, cespites distinctos efformans, foliis 

 breviter ovato-cuspidatis. 



From Muir Glacier (Trelease, 2426, 2434, 2441, 2461, 2462); 

 Hidden Glacier Inlet in Yakutat Bay (Trelease, 2518). 



Bryum acutiusculum C. Mull, in Flora, 1887, p. 220. 



From Chilkoot (Krause brothers). 

 Bryum caespiticium Linn. Sp. plant., p. 1121. 



Alaska, sine loco (Frederick Funston, 26) ; Muir Glacier, (Tre- 

 lease, 2427 in part). 



Bryum pallens Sw. Muse, suec., pp. 47, 98, pi. 4, f. 12. 



From head of Russell Fiord (Coville and Kearney, 960) ; Disen- 

 chantment Bay (Trelease, 2522 ; forma rubro-vinosa) . New to Alaska. 



Bryum pseudostirtoni Philib. sp. nov. 

 (Pi. xvm, fig. 4 a - r ). 



Saepe synoicum, dense cespitosum, sordide vel lutescenti-viride. 

 Caulis elongatus, filiformis, parce ramosus, 2.5-4 centim. altus. 

 Folia mollia, laxiuscula, sicca erecto-imbricata, madida erecto-patentia, 

 caulina ovato-lanceolata, acuminata costaque longe excurrente cuspi- 

 data, 2 millim. longa, 0.7 lata, marginibus integris planis vel subre- 

 flexis, costa angusta, 60-70 ft basi lata, rete laxo, cellulis inferioribus 

 rectangulis, mediis superioribusque ovato-hexagonis, long. 2850 /*, 

 lat. 14-17, marginalibus angustioribus. Folia ramea minora, inferiora 

 ovata, subobtusa vel breviter cuspidata. Capsula in pedicello gracili, 

 1.5 centim. longo, nutans vel pendula, oblonga, parva, 2 millim. longa, 

 collo brevi attenuata, sicca sub or econstricta, operculo conico-mamil- 

 lato. Exostomii dentes pallidi, basi rubri. Endostomium perfectum, 

 ciliis nunc longe appendiculatis, nunc simplicibus. Sporae 12-18 ft 

 crassae. 



From Muir Glacier (Trelease, 2448, 2459). 



