the Genus Streptopogon. 139 
is made of the papillate gemmiferous cells at the apex of the 
leaves ; these, however, are found constantly in all the leaves, 
and are very characteristic of the species. The papillate cells 
at the back of the leaf are confined to the apical region, 
where they occur at the back of the hooded (cucullate) apex, 
not reaching quite to the incurved apical margin of the leaf 
and running down the leaf for a short way in two bands at 
a little distance from the nerve. The papillae are large, and 
very truncate at the apex. The gemmae are brownish, more 
or less cylindrical in shape, and consist of about 3-8 cells, 
the walls being apparently always transverse only and not 
longitudinal as well as in S'. rigidus. Very rarely a few cells 
on the upper (ventral) surface of the leaf, situated immediately 
below the incurved apex, bear the same shaped papillae, as 
well as those on the dorsal surface. I have observed this 
in the case of two leaves only amongst a considerable number 
of stems examined in Mitten’s herbarium and at Kew; also 
in a single leaf on one of the stems in Hampe’s herbarium, 
and here it was seen that the papillae bear gemmae of the 
same shape as those arising from the dorsal papilliferous cells. 
There occur also at times on the upper surface of the leaf 
long narrowly cylindrical gemmae, brownish in colour in the 
upper part and often pale below, 20 cells or more long, and 
sometimes slightly branched. These are somewhat similar 
to the gemmae which occur on the leaves of Ortho trichum 
Lyellii , Hook, and Tayl. 
Up to the present, S'. cavifolius has been known only, in 
the barren state, from the Andes of Quito (Spruce, Muse. 
Amazon, et And., nr. 140). There is, however, in Bruch’s 
herbarium at Kew a plant labelled ‘ Acrocarpum (nov. gen.) 
Capsida breviseta ( gymnostomo ?) Calyptra mitraeformis lacini - 
ata ; fol. late-lanceolata concavo-cucidlata. — Mexico, inter 
Hypna , ad arbor.’ On the label has been written later 
‘ Streptopogon' \ and the plant proves on examination to be 
a fruiting example of S', cavifolius . This specimen bears 
a few very old and decayed capsules, also one young capsule 
with an apparently mature calyptra and a riper, nearly mature, 
