316 SALMON: SOME SPECIES OF ECTROPOTHECIUM 
vesiculare. Mixed with these, however, are plants which are 
clearly referable to H. vesiculare type, agreeing perfectly in the 
habit, the small size, the short branches, and small roundly ovate 
apiculate-acuminate branch-leaves. 
The plant figured natural size under the name /7. Montagnet 
Schimp., by Montagne in La Sagra, Hist. Cuba, Crypt. p/. 20. 
f. 1, has the more robust habit and regular pinnate branching of 
the var. Poeppigianum described below. 
Mitten quotes (Musci Austro-Amer. 519) under £. amphibolum, 
Cuba, “ Wright, inter n. 120,” but the plant referred to belongs — 
as the specimen in Mitten’s herbarium shows —to £. vescudare. 
Mitten quotes (/. c. 518) also a plant collected by Spruce in the 
Andes of Peru (Spruce, Musc. Amazon. et And. vo. 1145) as be- 
longing to &. vesiculare. In the examples under this number in 
Mitten’s herbarium, and in the herbaria at Kew and the British 
Museum, however, the plant is not £. vesiculare, but E. amphibo- 
Zum, showing clearly the more denticulate dorsal and lateral branch- 
leaves, and the characteristic shape and areolation of the ventral 
branch-leaves of the latter species. The same is also the case 
with specimens in the Kew Herbarium, from Rio de Janeiro (col- 
lected by Glaziou), which have: been referred to Z. vesiculare by 
Mitten. 
In Mitten’s herbarium there is a small specimen consisting of 
part of a stem bearing one seta (without a capsule) labelled 
“ Brazil.” This moss unquestionably belongs to true £. vesiculare. 
Unless careful attention is paid to certain points the present 
species is very liable to be confused with E. amphibolum. EF. 
vesiculare type may usually be known by its smaller size, and 
more compact habit, with the branches more complanate, spread- 
ing at right angles, and more or less arcuate ; it is, however, by 
certain characters shown invariably by the branch-leaves that the 
two species are best distinguished. In &. vesiculare the ventral 
branch-leaves are broadly ovate-acuminate, and the areolation 1s 
lax, with hexagonal and subhexagonal cells, measuring 15-20 X 
40-504. In &, amphibolum the ventral branch-leaves are more 
longly acuminate from a narrower ovate base, or are sometimes 
ovate-lanceolate; the areolation is narrow, with subprosenchy- 
matous cells measuring 15 x 80-100. The dorsal and lateral 
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