414 MUSCI. Hypnum. 



attenuate to a flexuose point : capsule gibbous-ovate on a red rugose pedicel \ inch 

 long, with broad compound annulus and short acute-conic operculum : ciliolse 2, very 

 slender. Trans. Amer. Phil. Soc. xiii. 12 ; Sulliv. & Lesq. 1. c., n. 502. 

 On the ground under Umbellularia California!, Oakland, Bolander. 



-i H * Branching pinnate or somewhat irregular and fascicled : leaves not 

 sulcate or scarcely so, nor decurrent ; areolation linear-oblong, rounded at the 

 angles : flowers dioecious : capsule sometimes nearly erect and sub symmetrical : 

 pedicel smooth. 



17. H. myosuroides, Linn. Stems slender and branches incurved, often- 

 flagelliform : leaves ovate-lanceolate, very finely acuminate, serrulate above, costate 

 beyond the middle ; perichsetial leaves with very slender abrupt recurved apex : 

 capsule oblong on a smooth elongated pedicel : processes (at length bifid) nearly 

 equalling the teeth, a half longer than the 2 ciliolae. Engl. Bot. t. 1567. Isothe- 

 cium myosuroides, Brid. ; Bruch & Schimp. Bryol. Eu t. 534 ; El. Dan. t. 2750. 

 Eurhynchium myosuroides, Schimp. 



Near San Francisco, in dry woods (Bigelow) ; Port Discovery, Washington Territory (Pickering) ; 

 Atlantic States and Europe, on the ground, rocks, and at the roots of trees. A very variable species, 

 to which the following are probably to be referred, and holding an intermediate position between 

 several of these nearly allied groups or so-called genera. 



18. H. stoloniferum, Hook. Much larger, the leaves more elliptical, minutely 

 papillose on the back above the middle and more coarsely serrate, and capsule more 

 drooping ; the ciliolse equalling the processes. Muse. Exot. t. 74 ; Mitten, Journ. 

 Linn. Soc. viii. 34; Lesq. in Mem. Calif. Acad. 31 ; Sulliv. <k Lesq. Muse. Am.-Bor. 

 Exsicc. 2 ed. n. 425. H. myosuroides, var. stoloniferum, Muell. Syn. ii. 500. 



Common on trees in the Coast Ranges (Menzies, Bigelow, Bolander), and northward to Alaska. 



1 9. H. Brewerianum, Lesq. In dense tufts on dry rocks, of a darker color, 

 with short stems and abruptly short-acuminate leaves strongly concave and scarcely 

 denticulate. Trans. Amer. Phil. Soc. xiii. 12, and Mem. Calif. Acad. i. 32 ; Sulliv. 

 & Lesq. 1. c., n. 426. 



On inetamorphic sandstone around San Francisco, Brewer, Bolander. 



20. H. aggregatum, Mitt. Densely tufted, dull yellow, the elongated branches 

 simple or sparingly divided : leaves broadly ovate, shortly acuminate : capsule cylin- 

 dric, inclined, somewhat incurved ; operculum acuminate : ciliolse solitary, half as 

 long as the processes. Journ. Linn. Soc. viii. 35, t. 6 ; Lesq. in Mem. Calif. Acad. 

 i. 32. H. Brewerianum, var., Sulliv. & Lesq. 1. c., n. 427. 



On trunks of trees in deep canons, Oakland (Bolander) ; Vancouver Island, Lyall, Douglas. 

 Mitten, 1. c., describes several other species (H. acuticuspis, etc.) of Washington Territory and 

 British Columbia, which much resemble these. H. leucodadulum and H. comprcssutum,.M.ue\l. 

 (Flora, xxxiii. 79), from Oakland, Oregon (Nevius), belong evidently to the same alliance. 



H +~ H Branching irregular : leaves subdecurrent, not sulcate ; areolation 

 very narrow, flexuous, dilated at the angles : flowers dioecious : pedicel rough. 

 SCLERO PODIUM. (Scleropodium. Schimp.) 



21. H. caespitosum, Wils. Densely cespitose, creeping, with short simple 

 incurved branches : leaves spreading, subsecund, broadly ovate- to oblong-lanceolate, 

 acutely acuminate, concave, serrulate, margins flat, costa reaching above the middle : 

 capsule oblong, suberect upon a minutely tuberculate purple pedicel about -^ inch 

 long, somewhat incurved ; operculum conic-rostellate. Engl. Bot. Suppl. t. 2878, 

 and Bryol. Brit. t. 55 ; Sulliv. & Lesq. 1. c., n. 510. Scleropodium caispitosum, 

 Bruch & Schimp. 1. c., t. 556. 



On shaded rocks and on the ground among redwoods, Oakland (Bolander) ; Europe. 



22. H. illecebrmn, Schwaegr. In less dense bright green patches, with in- 

 curved obtuse branches about an inch long : leaves closely imbricated, roundisli 



