Analytic Keys to the Species of Mosses. 45 
Polygamous, costa excurrent into a hyaline spinulose hair B. Muelleri, 48. 
Dioicous. 
Costa pereurrent or ceasing below apex . . . B. latifolia, 45. 
Costa short-excurrent, clothed above with gemmae B. papillosa, 47. 
Costa naked, excurrent into a hyaline, spinulose hair. 
Hair red at base, upper leaves acute . . B. megalocarpa. 1 
Hair white throughout, upper leaves rounded or 
emarginate ........ B. ruralis, 46. 
GRIMMIA, p. 134. 
Seta shorter than the capsule. 
Straight, capsule symmetric. 
Lid falling with columella.§ I. Schistidium. 
Lid persistent on columella.§11. Scouleria. 
Crooked, capsule ventricose ... § III. Gasterogrimmia. 
Seta longer than capsule. 
Arcuate.§ IT. Eugrimmia. 
Straight.§ Y. Guenibelia. 
§ I. Schistidium. 
Leaves with hyaline points (excl. vars. of 1 and 3) 
Pericheetial leaves obtuse, in lower £ cells large . G. platyphylla, 4. 
Perichaetial leaves hair pointed. 
Capsule oblong.G. ambigua, 2. 
Capsule ovate-globose. 
In small dense cushions, soft, lurid green . G. conferta, 1. 
In lax cushions, coarse, fuscescent G. apocarpa, 3. 
Leaves muticous. 
Margins plane. 
Coarsely dentate at apex.G. Agassizii, 5. 
Entire at apex.G. liiaritiina, 6. 
Margins recurved or revolute . . . • | G* apocarpa | vars * 
§ II. Soouleria. 
Includes but one species.* G. Scouleri, 7. 
§ III. Gasterogrimmia. 
Peristome 0, lamina bistratose near apex .... G. anodon, 8. 
Peristome present, lamina unistratose throughout . G. plagiopoda, 9. 
J Kindberg: Bull. Torr. Bot. Chib , xvi (1889), 92. 
