Hypnicm. MI "SCI. 415 



ovate, recurved-apiculate, very concave, minutely serrate above, margin flat, costa 

 ceasing (excurrent) above the middle : capsule cernuous or horizontal on a very 

 rough pedicel an inch long, ovate-oblong, abruptly incurved ; operculum convex- 

 conic, apiculate. Engl. Bot. t. 2189; Wilson, Bryol. Brit. t. 35; Sulliv. & Lesq. 

 1. c., n. 508, 509. H, Uandum, Hook; Engl. Bot. Suppl. t. 2715. Scleropodium 

 illecebrum, Schimp. Bryol. Eur. t. 557. 



On ground and rocks, San Francisco, Oakland, and in the Sierra Nevada (Bolander) ; Europe. 

 Several forms occur, sometimes in compact dark brown tufts, with densely imbricated ovate obtuse 

 nearly entire leaves and julaceous branches (in water, Yosemite Valley), or subdendroidal, with 

 acute nearly entire leaves. 



23. H. Californicum, Lesq. Loosely cespitose, with rather long filiform root- 

 ing branches : leaves spreading and loosely imbricated, ovate-lanceolate, acuminate, 

 concave, entire or nearly so, the stout nerve ceasing below the apex, alar areolation 

 ovate-quadrate and more or less granulose ; perichsetial leaves broadly ovate-lanceolate 

 with long filiform acumination : capsule ovate-cylindric, pale green, cernuous upon a 

 long reddish pedicel papillose only above, somewhat constricted below the mouth, 

 at length erect ; operculum broad-conic, acutish : peristome red, the inner yellow, 

 cilioke solitary or in pairs. Trans. Amer. Phil. Soc. xiii. 13 ; Sulliv. & Lesq. 1. c., 

 n. 511. 



On rocks and dry sand near the bay of San Francisco, Bolander. 



* * Operculum long-beaked. 



*- Branching irregular : leaves spreading equally or subcomplanate : areolation 

 narrowly rhombic-hexagonal and sitbflexuose, dilated at the angles : pedicels 

 smooth. EHYNCHOSTEGIUM. (Rhynchostegium, Schimp.) 



24. H. rusciforme, Weiss. Amphibious, rather rigid, deep or dusky green ; 

 branches subfascicled, rather long, often simple and naked below, arcuate : leaves 

 firm, somewhat flattened, roundish ovate, shortly acuminate, serrate, costate nearly 

 to the apex, areolation narrowly long-rhombic : capsule ovate, cernuous ; annulus 

 broad ; operculum as long as the capsule : ciliolae (2 or 3) nearly equalling the red- 

 dish teeth. H. ruscifolium, Neck. ; Engl. Bot. t. 1275 ; Fl. Dan. t. 2389. H. 

 riparioides, Hedw. Muse. Frond, iv, t. 4. Rhynchostegium rusciforme, Bruch & 

 Schimp. 1. c., t. 515. 



In a stream near Monte Diablo (Hillebrand, Bolander) ; Atlantic States and Europe. H. Royce, 

 Austin (Coult. Bot. Gaz. iii. 31), described from insufficient material, is referred by Mr. Austin 

 to this group ; collected in California by Mrs. J. Roy. It is said to be a small species, with 

 straight stems, distant erectish leaves with oval- and oblong-rhombic areolation, etc. 



t- *- Branching more or less pinnate : areolation as in the last. EURHYNCHIUM. 



(Eurhynchium, Schimp.) 



H- Pedicels smooth : leaves thin, subsulcate. 



25. H. Strigosum, Hoffm. Stem creeping or decumbent, an inch long or more, 

 the attenuated branches more or less erect, ^ inch long : leaves spreading, crowded, 

 widely cordate-ovate, short-acuminate or obtusish, concave, costate above the middle, 

 serrate to the base : male plants parasitic on the female : capsule cernuous or sub- 

 horizontal, ovate-oblong or incurved-cylindric : ciliolse in pairs, slender. Wilson, 

 Bryol. Brit. t. 55. H. pulchellum, Hedw. Spec. Muse. t. 68. Eurhynchium strigosum, 

 Bruch & Schimp. Bryol. Eur. t. 519. 



On wet ground at Calaveras Grove (Bolander) ; Fort Colville and Galton Mountains (Lyall) ; 

 Uinta Mountains ( Watson) ; Atlantic States, Chili, and Europe. 



H- -H- Pedicels roughened. 



26. H. Stokesii, Turner. Branches ascending, simple below, densely pinnately 

 or bipinnately branched above : cauline leaves remotish, squarrose, acuminate-cordate, 

 on the branches smaller, erect-spreading, broadly ovate-lanceolate, serrate to the 



