18 TEXAS RESEARCH FOUNDATION: CONTRIBUTIONS, VOLUME 5 
43. Leaf blades oblanceolate 
or oblanceolate-elliptic, 
narrow, acuminate, ob- 
securely crenulate (His- 
paniola, Puerto Rico) 
...41. P. crenulata. 
42. Leaves with opaque glands, 
the glands dark red or 
black. 
44. Leaf blades broadly obo- 
vate or elliptic, con- 
spicuously dentate, 
thinly membranaceous; 
pubescence of leaf mi- 
nute, appressed, pale 
(British Honduras) ... 
..42. P. membranacea. 
44. Leaf blades entire or 
finely crenulate, not 
dentate, chartaceous; 
pubescence of leaf 
coarser, subappressed, 
ferruginous. 
45. Leaf blades finely 
crenulate; pistil 
glabrous (Hon- 
duras south to Pan- 
ama, Colombia 
and Venezuela)... 
. 43. P. fusca. 
45. Leaf blades entire or 
subentire; pistil 
pubescent (Guate- 
Wik6) <0 Ge 
..44. P. oblanceo- 
lata. 
SECTION II 
Inflorescences axillary 
1. Pubescence of branchlets and undersurface of leaves usually coarse; hairs 
either stellate with erect and spreading rays; or dendroid, either stipitate 
and bearing apical or lateral branches, or multibranched to base 
reer el ee re i Series 11-13. 
Series 11-13 
2. Margin of leaves dentate with sharp regular teeth; hairs of branchlets and 
undersurface of leaves simple, or long stipitate and bifid, or stellate 
apically (Guatemala)..................,...... 4 FF vetla. 
