A Monograph of the Genus 
Streptopogon, Wils. 
BY 
ERNEST S. SALMON, F.L.S. 
With Plates VIII, IX and X. 
HE genus Streptopogon was founded in 1 851 by Wilson (33) 
■A. on the South American moss described by Taylor (31) 
in 1846 as Barbula erythrodonta , The genus was then defined 
as follows : c Calyptra mitriformis, superne scabra ; peristo- 
mium simplex, ciliiforme ; cilia 32 aequidistantia, in ciliola 
duo postice fissa, laevia, in spiram unam dextrorsum contorta, 
basi in membranam angustam coadunata ; cellulae operculi 
contortae. — In its mitriform, scabrous calyptra this curious 
moss resembles some species of Tayloria , but the peristome 
is that of Barbula , to which genus it is closely allied.’ 
A few years later Mitten (12 and 12*) referred to the present 
genus the moss, from Chile, described in 1842 (28) by Schwae- 
grichen as Barbula mnioides ) and also the moss from Kerguelen 
Island published by Hooker and Wilson (8) in 1844 as Schisti- 
dium marginatum. In 1865 Hampe (5) descried Streptopogon 
Lindigii from Colombia (New Granada). Spruce, in 1867, in 
his catalogue of the mosses collected by him on the Amazon 
and in the Andes (29), mentioned by name only S. rigidus , 
Mitt., S', cavifolius , Mitt., and S. erythrodontus var. clavipes , 
Spruce ; these three plants were distributed by him in the 
‘Musci Amazonici et Andini.’ S. cavifolius and S. clavipes 
(but not S. rigidus) were described by Mitten in his ‘ Musci 
[Annals of Botany, Vol. XVII. No. LXV. January, 1903.] 
