140 Salmon . — A Monograph of 
operculate capsule (Fig. 70). The calyptra is glabrous, and 
if, as appears to be the case, it is really mature forms in this 
character a notable exception in the genus, as in all the other 
species the calyptra is rough. In the nearly mature operculate 
capsule the peristome can be seen quite clearly through the 
cells of the operculum ; the teeth are red, almost straight, 
and spring from a palish basal membrane. The capsule is 
emergent, and is borne on a very short seta which is thickened 
upwards like that of 5 . Lindigii ; the perichaetial leaves 
resemble the cauline, except that they are slightly longer, 
and have the lower part more sheathing. In the single fertile 
stem that I have dissected, I was unable to find any male 
inflorescence ; as, however, the capsule was very old and the 
stem-leaves decayed, and as in the present genus the male 
flower in the autoicous species is very small and easily passed 
over, too much value must not be attached to this negative 
evidence, since it is possible that the antheridia may have 
decayed away. 
I have also detected four barren stems of .S', cavifolius 
growing intermixed with the type-specimens of 4 Calymperes 
Lindigii ’ (S. rigidus) in Hampe’s herbarium at the British 
Museum, so that a third locality, viz. Colombia, Bogota, Pacho, 
2,200 mtr., can be now added for the species. 
The Mexican record noted above is of great interest, not 
only as adding the species to the Flora of North America, 
but especially by the discovery of the fruit, as establishing 
the position of the species in the present genus ; previously, 
on account of its barren condition and anomalous shaped 
leaves, its affinity was somewhat doubtful. 
In its usual form S. cavifolius has rather broad patent 
leaves, about \ mill, wide, slightly concave throughout up to 
the hood-shaped (cucullate) apex. Sometimes, however, as 
is well seen in stems in Mitten’s herbarium, the leaves are 
narrower, erect, not patent, and cymbiform-concave up to the 
cucullate apex (Fig. 63). The apex of the leaf in the latter 
case is often slightly wider than the lower part of the leaf, 
owing to the margins there being strongly incurved, so that 
