Lycopodiace/E of Guiana and their Allies. 51 
leaves, between which the stem is visible from | to | 
inch. L. fiasserinoides, as I have before pointed out, in 
some of its states comes near it, but in that the stems are 
never so slender or flaccid, nor the leaves so few in series or 
so loosely placed on the ribs. The specimen from Appun, 
quoted above, has nearly 100 final branches, all devel- 
oped by repeated forking from a single primary stem. 
General distribution — Tropical America abundant, 
from the West Indies to Brazil. 
Note.— The following given in Schomburgh's Reisin in Britisch 
Guiana I have not seen Guiana specimens of : — L. aristatum, H. B. K. 
L. dendroideum, Spring., L. jussiaei, Desv., L. robustum, Klotzsch 
Genus II. Psilotum, S^artz. 
Sporangia sub-globose, trilobed, axillary in the minute distant leaves. 
Branches very slender, repeatedly dichotomous, trigonal or flattened. 
Leaves simple or bifid. — Bernhardia, Willd. 
This small genus consists of only two species, which 
however make up for the paucity of type in their abun- 
dance and wide distribution. They are small and twiggy 
plants ; starting from a simple base, and repeatedly fork- 
ing till they become a broom-like fascicle of twigs, with 
distant and very inconspicuous leaves. Only one of 
them, the commonest, has yet been found in Guiana. 
§ § Branches trigonal. 
I, Psilotum triquetrum, Swartz. — Fl. Brasil, p. 133. Gr. Fl. B. W. I. p. 
648. — Rootstock composed of few wiry deeply penetrating roots. Stems 
few inches to a foot long, strong, ereft or pendent, cylindric below, 
ribbed and angular above approaching the first furcation. Branches 
triquetrous, with sharp angles, repeatedly dichotomous, forming a 
brush like head, slender, virgate, short and stiff or longer and very 
flexible. Leaves minute, simple or forked, at intervals in dentations on 
the edges of the branches. Capsules in the axils of the leaves, 3-lobed. 
A more repeatedly branched bushy and stiffer species 
than the other, easily recognised by the three cornered 
G 2 
