Palms of British Guiana. 253 
\B. aristata, Mart : 
Occurs according to Schomburgk in the Canakoo 
and Tooarootoo mountains, flowering in August and 
September.] 
[Z?. concinna, Mart : 
Occurs, according to SCHOMBURGK, in the forest 
region, on the upper Essequibo and the Roopoonooni : 
in the sandstone region, at Roraima : and in the savan- 
nah region, on the Roopoonooni, flowering, in all these 
localities, in August.] 
B. leptocarpa, SP. N. Trail. 
(B. campestri, Popp : affi,.) 
A very tall species, often 20 ft., growing in clumps 
ot two or three in swamps. Stem thickly clothed 
with gray spines, stoutish (in one we measured it 
was 8 inches at the thickest part, 12 inches about 
the centre). The whole plant has a great tendency to 
develop aerial roots, which are often long and dense, and 
grow from more than one point on the stem. Leaflets 
very broad and rigid at the apex, set at various angles 
to the mid-rib. Fruit, smooth, very small {\-\ in diame» 
ter), subspherical, whitish before maturity, then red. 
This plant is extraordinarily abundant in very swampy 
places, in the forests, on the wet savannahs and along 
the river banks, from the sea up to the first falls. 
A similar, but apparently slightly different species (or 
perhaps variety) called by the Warraus Yaroowa forms 
dense thickets along certain parts of the Barama, in the 
Pomeroon district, where, however, B. leptocarpa, Trail, 
is also very abundant and far more widely spread, 
II 2 
