178 BULLETIN OP THE UNIVERSITY OF WISCONSIN. 



Spores reticulate B. Texana, 48. 



Spores papillose B. Bolanderi, 46. 



Distinctly papillose B. Donnellii, 48. 



2. Ca^isule immersed. 



Spores pitted B. Carolinae,* 40. 



Spores reticulate. 



Calyptra popillose B. Ravenelii, 49. 



Calyptra smooth B. Druiumondii,* 48. 



B. Beyrichiana Mxill. is rejected as mixed and uncertain; B. Hamp- 

 eana Mtlll. is a Chilian species. 



ASTOMUM, p. 51. 



Leaves not crispate when dry. 



Capsule chestnut-brown, ovoid .... A. nitidulum, 52. 

 Capsule orange, oval .... A. nitidulum, var., 52. 



Leaves crispate when dry. 



Capsules often clustered (2-3), oblong oval . A. Ludoviciauum, 52. 



Capsule solitary. 



Brown globose, capsule immersed ... A. crispum, 51. 



Brown globose, capsule exserted ... A. Drummondii, 4I. 



Orange, sub-globose, immersed . . .A. Sullivantii,* 52. 



GYMNOSTOMUM, p. 52. 



Lid long remaining attached to columella, capsule thick- 

 walled, with 6-8 rows of transversely elongated cells 



at the mouth (x. curvirostre, 53. 



Lid falling early, capsule thin-walled, with 3-4 rows of transversely elon- 

 gated cells at mouth. 



Plants 1-2 mm. high, lid conic G. tenue, 54. 



Plants 5-10 mm. high, lid subulate, costa 24 — 35/< wide 



at base with 2 guides^ G. calcareum,^ 53. 



Plants 1-7 cm. high, costa IQfi wide at base, with 4-6 



guides « G. rupestre, 53. 



' Incl. B, brevicollis L. & J. Man. 47. 



" B. Ravenelii mollis L. & J. Man. 49. Fuller description, Appendix no. 40. 



* B. brevipes L. & J. Man. 48. B. brevipes Hook, is African. 



* A. Sullivantii is probably a variety of A. crispum. Most American specimens seem 

 to be referable to A. Sullivantii. (Ren. & Card.) 



* As far as can be determined G. platyphyllum Kindb. (Appendix no. 44) falls here. 



* See explanation under Dicranum, p. 181. 



