Analytic Keys to the Species of Mosses. 
69 
ii. Costa strong. 
* Capsule oval or oblong, operculum convex-conic. 
Leaves entire ..H. atroyirens, 1. 
Leaves serrulate at apex.H. radicosum, 3. 
* * Capsule cylindric, or if oval-oblong then operculum long-rostrate 
(excl. H. gracile.) 
Plants small (to 5 cm.) delicate, creeping, 1—2 -pinnate. 
+-e- Costa of stem-leaves wide (-| leaf-base.) 
Stems papillose.H. pygmgeum, 7. 
Stems radiculose-tomentose.H. miimtulum, 6. 
-e-e- ■*-*• Costa of stem-leaves half as ivide. 
Stem-leaves with long pellucid point, cilia 0 . H. erectum, 9. 
Stem-leaves short acuminate, cilia 2.H. scituni, 8. 
Stem-leaves long acuminate, cilia 3 H. gracile, 10. 
Stem-leaves long acuminate, cilia 1 H. calyptratum, 11. 
-t -*— Plants large (to 10 cm.), creeping, 2—3 -pinnate, forming extensive 
flat mats. 
Perichaetial leaves long ciliate below. 
Apical cells of branch-leaves not papillose, ovate, pro¬ 
jecting .H. tamariscinuin, 12. 
Apical cells of branch-leaves oblong, with 2—3 papillae H. delicatulum, 14. 
Pericheetial leaves not ciliate, apical cells of branch leaves 
round.. H. recognitum, 13. 
-»-«-*— Plants large (to 10 cm.), erect, 1-pinnate, in ivide tufts. 
Capsule narrowly cylindric (1:5—6) .... H. aMetiuum, 15. 
Capsule oblong-cylindric (1:3) .H. Blandovii, 16. 
b. Paraphyllia 0. 
Seta smooth. 
Plants in large mats, leaves serrulate at apex, costate 
to middle.H. Brewerianum, 66 
Plants minute, leaves serrulate all round, costate to 
apex.H. leuconeurum, 19. 
Seta rough. 
Stem leaves with hyaline piliferous point . H. raimilosum, 21. 
Stem leaves not hyaline pointed. 
Perichastial leaves costate H. Whippieanum, 20. 
Perichaetial leaves ecostate. 
Bright green, leaves open, loosely imbricate . H. laxifolium, 23. 
Dirty or yellowish green, leaves sub-falcate secund, 
closely imbricate.H. crispifolium, 22. 
