PITTIER—PLANTS FROM COLOMBIA AND CENTRAL AMERICA, 149 
the shape of the petals, etc., make it unequivocally a member of the 
Brownea group, the only other deviation being in the number of 
stamens. 
The generic distribution of this group can hardly be considered as set- 
tled, because of the fact that the species are very scantily represented 
in most herbaria. Much importance seems to have been attached, 
for instance, to the greater or lesser development of the petals, 
which is the only character separating Heterostemon from Eliza- 
betha. I should not be surprised if a further study of these two 
genera would lead to their fusion and even Palovea, differing from the 
two former mainly by the free stamens, has, in my opinion, only a 
doubtful standing. These three genera constitute by themselves a 
group, while Macrolobium, with the upper petal abnormally devel- 
oped, forms another, transitional toward Eperua, and Brownea a 
third, remarkable for its structural uniformity through a large num- 
ber of specific forms. Through the cauliflorous B. macrophylla it 
leads again into Browneopsis, while Browneopsis excelsa establishes 
another link between this genus and the Browneas with terminal 
inflorescences. 
The following descriptions in these two genera are only of species 
represented in the U. S. National Herbarium: 
ae 
: PANAMANIAN AND VENEZUELAN SPECIES OF BROWNEA. 
KEY TO THE SPECIES. 
Leaves 5 to 15-jugate. (MULTIJUGATAE.) 
Rachis of leaves densely brownish-hairy; seeds flattened; 
young shoots 4-sulcate..... 2.2.0.2... ee cence eee ee 1. B. grandiceps. 
Rachis of leaves glabrescent; seeds quite thick; young 
shoots terete... 4.....-.2-- 22 e ee eee eee ee eee eee eee 2. B. ariza. 
Leaves 2 to 6-jugate. (PAUCcITUGATAE.) 
Pods narrow (not over 1.5 cm. broad); leaflets short and 
broad. ......22- 222 eee ee eee eee eee rece e eee ees 3. B. guaraba. 
Pods broad (3 cm. or more). 
Floral sheath about equal to the receptacle tube; clusters 
few-flowered.........--2. 0022-22 e ee eee eee eee 4. B. aroensis. 
Floral sheath distinctly longer than the receptacle 
tube. 
Leaflets eglandulose. 
Pedicels 7 to 8 mm. long, thick.............. 5. B. coccinea, 
Pedicels 9 to 15 mm. Icng, slender; floral 
clusters single, few-flowered........... 6. B. speciosa. 
Leaflets with a basal gland. 
Floral clusters on stem only; leaflets 3 to 6 pairs. 7. B. macrophylla. 
Floral clusters axillary or terminal. 
Leaves mostly 2-jugate; terminal leaflets 
up to 40 cm. long. .......-.-- ..... 8. B. rosa-del-monte. 
Leaves mostly 3-jugate; terminal leaflets 
about 16 cm. long.........-...----- 9. B. latifolia. 
