Bruchia. MUSCI. 359 



Only tlm following spocics nro found in Aniorirn, both nlso Kurojionn ; ollirr species belong to 

 tlio Old WoiM. Tlio giMiiis nppioficlips l'o:ti<t, except in the want of nn opeiculiun. 



1. P. CUSpidatum, Schreb. Densely. cltistenMl ; stems simple or somewhat 

 braiiclied, about 2 lines liijj;h : leaves densely crowded at least above, oblong-lanceo- 

 late and long-acuminate, cuspidate with the excurrent costa, carinate-concave, the 

 margin subrevolute below, more or less papillose on the back toward the aj)ex : male 

 flower with one perigonial leaf: capsule immersed, globose or rarely ovate, shortly 

 and obtusely apiculate, chestnut-colored. — Ib-uch & Schimp. ]5ryol. Eur. t. 5 ; 

 8chimp. Syn. Muse. 2 ed. IG, t. 1 ; Sulliv. in Gray's Manual, 2 ed. Glo, t. 1. 



AtMission Dolores, with the preceding (Bnhindcr) ; common in the Atlantic Slates and through- 

 out Eiuo[)e, and in most temperate regions, in various forms. 



2. P. bryoides, Dickson. Cesj)itose; stems 2^ to 5 lines high, simple or 

 branched, at length decumbent and rejiroduced from the l)ase : lower leaves minute 

 and remote, the upper much larger, counivent or somewhat spreading, oblong- to long- 

 lanceolate, concave, cuspidate : male flower terminal, becoming apparently axillary : 

 capsule emergent or wholly exserted, erect upon a straight pedicel, oval to oblong- 

 elliptical with an oblicjtie blunt beak, brown, dull. — 15ruch it Schimp. 1. c, t. G; 

 Berkeley, I'.rit. Moss. t. 24, iig. 8. 



Var. piliferum, Schimp. Leaves shorter, i)iliferous : capsule ovate, on a shorter 

 pedicel. — Syn. Muse. 2 ed. 19. 



South side of Oakland Hills {Bolandtr), the variety ; also European. 



4. PLEURIDIUM, Bridel. 

 Annuals or the stem at length decumbent and producing innovations or flagelli- 

 form branches below the apex. Leaves lanceolate or lance-subulate, shining, firmly 

 costate, remotely and obtusely serrate toward the apex, the areolation oblong-hex- 

 agonal below, narrower above. Inflorescence monoecious or bisexual. Calyptra small, 

 cucullate. Capsule immersed or exserted upon a short pedicel, becoming lateral after 

 the branching of the stem, ovate-globose or ovate, shortly apiculate, smooth and 

 shining. — Astomum, Hampe. 



Ten species are described, three European, three North American, the rest of the southern 

 liemisphere. 



L P. subulatum, Bruch Sz Schimp. Stem 1 to 3 lines high, rarely branched : 

 upper leaves crowded, erect-spreading and somewhat secund, much exceeding the 

 capsule, lance-subulate and subsetaceous, not carinate, the broadish costa ceasing 

 near the obsoletely serrate apex : antheridia naked in the axils of the perichaetial 

 leaves : capsule ovate-globose, pale brown. — Bryol. Eur. t. 9. • Phascum subulatum, 

 Linn.; Hedw. Muse. Frond, i. 93, t. 35; Engl. Bot. t. 2177; Wilson, Bryol. Brit, 

 t. 5 ; Austin, Torr. Bot. Bull. vi. 142. 



Var. Stem stoloniferous : leaves broader at base, more convolute, and smooth 

 upon the back ; the inner perichaetial leaves not narrower, more abruptly contracted. 

 — P. subulatum, Lesq. in Trans. Am. Phil. Soc. xiii. 2, and Mem. Calif. Acad. i. 5 ; 

 Sulliv. & Lesq. Muse. Am.-Bor. Exsicc. 2 ed. n. 39, in part. P. sti-aviineum, Lesq. ; 

 Austin, 1. c. 



The variety at San Rafael, by ditches and on dry hills, Bolander. Intermediate between the 

 typical European P. suhiJatum and the Atlantic States fomi (also referred to it by Sullivant), 

 which Austin has distinguished as P. Ravencllii. 



6. BRUCHIA, Schwaegr. 

 CespitosG or densely clustered, Avith the habit of Pleurulium : stems simple or 

 sparingly branched : leaves shining, the lower minute and remote, the upper crowded 



