The type of this rare bush was collected by Spruce on 
the Rio Negro in Brazil. The known range of the species 
is appreciably widened to the west by the Colombian 
material cited below. The genus Pagamea has not hith- 
erto been reported from Colombia. 
Cotoms1a: Comisarias del Amazonas-Vaupés, Rio Apaporis, Raudal 
de Jirijirimo (below mouth of Rio Kananari). Alt. about 900 feet. 
General location: Lat. 0°5’ N, Long. 70°40/ W. “*Bush, 10 feet tall. 
Axes red. Flowers white.”’ Tauuads 21, 1952, Richard Roane Schultes 
& Isidoro Cabrera 14933.—Same locality and date. ‘‘Bush. Flowers 
rare, white. Common on savannahs. Full, up to 12 feet tall.’’ Schultes 
& Corer 14953.—Same locality. ‘‘Large bush. Fruit green. Axes 
red.’’ March 15, 1952, Schultes & Cabrera 15931.—Comisaria del 
Vaupés, Rio Karurd (tributary of Rio Vaupés), Mesa de Yambi, savan- 
nah Goo- -ran-hoo-da. Alt. about 950-1000 feet. General location: 
Lat. 1°20’ N, Long. 71°20’ W. April 15-16, 1953, Schultes § Cabrera 
19169. eoitoiaiearih del Vaupés, Rio Parana Pichuna (tributary of Rio 
Vaupés). Alt. about 700 feet. General location: Lat. 1°10’ N, Long. 
70°30! W. ““Bush. Fruit dark blue-black.’’ June 1953, Schultes & 
Cabrera 19921. 
Pagamea macrophylla Spruce ex Bentham in 
Journ. Linn. Soc. 1 (1857) 110. 
Pagamea macrophylla, the type of which was collected 
at Ipanoré on the Rio Uaupés of Brazil, near the Colom- 
bian frontier, is a much rarer plant than P. coriacea. I 
have never seen these two caatinga-plants growing to- 
gether. The former inhabits apparently only the light, 
shaded forest which rims the open, sandy savannahs, 
whereas the latter is at home exclusively in the sunniest 
parts of the savannahs or caatingas, where the vegetation 
is at most shrubby. 
CotompiA: Comisaria del Vaupés, Rio Piraparanaé (tributary of Rio 
Apaporis), Cafio Paca, General location : between Lat. 0°15/S, Long. 
70°30’ W and Lat. 0°25’ N, Long. 70°30’ W. ‘‘Small treelet.’’ Sep- 
tember 19, 1952, Richard Evans Schultes & Isidoro Cabrera 17581. 
GENTIANACEAE 
Halenia Weddelliana Gi/g in Engler Bot. Jahrb. 
25 (1898) 724. 
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