Monographs Details: Steereobryon subulirostrum (Schimp. ex Besch.) G.L.S.Merr.
Authority: Smith, Gary L. 1971. Conspectus of the genera of Polytrichaceae. Mem. New York Bot. Gard. 21: 1-83.
Family:Polytrichaceae
Description:Distribution and Ecology - Distribution: Mexico, Jamaica, Hispaniola, Puerto Rico, Colombia, Yenezuela.

Discussion:

Atrichum subulirostrum Schimp. ex Besch., Mem. Soc. Sci. Nat. Cherb. 16: 205. 1872.

Atrichum portoricense Crum & Steere, Bryologist 59: 254. 1956.

Illustrations: Frye (1948) ; Crum and Steere (1957).

The rudimentary stomata are never more than three or four to a capsule, and among the paratypes of Atnchum portoricense (MICH!) I found an occasional capsule which lacked stomata. The specific epithet subulirostrum refers to the extremely long, slender beak of the operculum.

This remarkable little moss appears to be intermediate between OUgotrichum and Atrichum. Steereobryon should probably not be regarded as the precursor of the latter genus, but as an independent expression of trends inherent in Oligotrichum which culminate in Atrichum. In all likelihood, the same oligotrichoid stock which produced Steereobryon and Atrichum also gave rise to Psilopilum sens. str.

Distribution:Mexico North America| Jamaica South America| West Indies| Puerto Rico South America| Colombia South America| Venezuela South America|