Synopsis ofthelycopodiacece of Guiana and 
their Allies. 
By G. S. Jenman, F.L.S., Government Botanist of British Guiana. 
N, the following paper I purpose to describe, ex- 
cluding ferns, I all the known vascular crypto- 
gamia of Guiana, so far as it has come under 
my notice. While at Kew last year I turned over the 
great collection there, which a few years ago was worked 
out and arranged by Mr. BAKER, for those species 
gathered by previous collectors which I have not myself 
discovered in my journeys in the interior. These 
orders have not before been worked out in Guiana. 
The fact is, that unless fore-warned by special study, 
the collector is liable to miss a good many species in his 
travels. Especially among the Selaginellaceae there pre- 
vails a close general resemblance in the more closely allied 
plants that is often to the casual observer misleading. 
The eye, too, does not very readily carry the distinctions 
even where, on comparing the plants together, they are 
obvious. Judging from my own experience in collecting, 
the species which inhabit the belt of country lying between 
the sandstone region and the sea are generally well known. 
But we appear not to be so well acquainted with those 
which inhabit the more elevated sandstone region. In 
the great alluvial belt alluded to I have found no new 
species, and those that occupy it are fairly widely dis- 
tributed. I mean widely distributed locally, for Selagi- 
nellas have, in nearly all cases, a relatively very limited 
range. With regard to the species of the sandstone 
