Analytic Key to the Gmera of Mosses. 
15 
B. Green protonema not persistent. 
Margins of leaves flat or incurved. 
Leaves lance-obovate to broad-ovate, not abruptly 
pointed.Pliyscomitrella, 89. 
Leaves linear- lanceolate to subulate or abruptly pointed. 
Calyptra mitrate.Brueliia, 45. 2 7. 
Calyptra cucullate ..... Pleuridium, 48. 27. 
[Astomum may be sought here.] 
Margins of leaves more or less revolute. 
Capsule spherical .... Spliserangium, 40. 27. 
Capsule short-pointed. 
Calyptra mitrate .... Microbryum, 45. 
Calyptra cucullate.Pliascum, 41. 27. 
II. STEGOCARPI.— Capsule with a deciduous operculum. 
A. Acrocarpi.— Flowers and fruit terminating the stem , either the 
main shoot or a branch. 
1. Mouth of the capsule naked. 
* Leaf-cells isodiametric , at least above the middle of the leaf, often 
obscure. 
Lid imperfectly formed, persistent .... Astomum, 51. 29. 
Lid perfect, deciduous. 
Capsule immersed. 
Leaves lamellose.Pharomitrium, 100. 
Leaves not lamellose, ciliate .... Hedwigia, 152. 
Leaves with a hyaline hair-point . . . Grimmia, 184. 43. 
Capsule exserted, ribbed when dry. 
Calyptra cucullate. 
Pedicel very short, strongly twisted to the left when 
dry .... . . Amphoridium, 158. 46. 
Pedicel long, twisted to the right when dry . Braunia, 153. 
Calyptra campanulate mitrate, plicate, usually 
hairy.• Macromitrium, 178. 50. 
Calyptra long clavate-campanulate, not plicate nor 
hairy .Encalypta, 180. 50. 
Capsule exserted, not ribbed when dry. 
Lid conic, beaked. 
Pedicel short. Calymperes, 184. 50. 
Pedicel long.Gymnostomum, 52. 29. 
Lid conic, beakless, or conic-subulate . . . Pottia, 100. 37. 
