152 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
The specific name ariza, from the Spanish “ariz4,’’ applied also to B. macrophylla, 
is not, as might be supposed, an aboriginal word. There was, about 1772, a governor of 
the Province of Darien called Don Andrés de Arizé, and it is not unlikely that the 
flower was named after him. 
EXPLANATION OF PLATES 59-62,—P1. 59, young leaves and sheathing stipules, Hope Gardens, Jamaica. 
Pl. 60, inflorescence and leaves, Cauca, Colombia, Pittier 613. Pl. 61, inflorescence and legume, Hope 
Gardens, Jamaica. PI. 62, seeds, Ancon, Panama, Pittier 2722. All natural size. Plates 59 and 61 are 
from photographs by G. N. Collins. . 
3. Brownea guaraba Pittier, sp. nov. 
A small tree. Branchlets slender, verruculose, 4-sulcate. 
Leaves paripinnate, 2 to 4-jugate, entirely glabrous; rachis obscurely sulcate at 
base, 2.5 to 12 cm. long, greenish brown; petioles 6 to 8 mm. long; petiolules thick, 
terete, blackish, 5 to 7 mm. long; leaflets subopposite, broadly ovate, long-acuminate, 
6.5 to 10 cm. long, 4 to 7 cm. broad, the basal pair smaller, distinctly cordate and 
almost orbicular, the others oblique, scarcely emarginate, 1-glandular at the base on 
the exterior side of the costa. Stipules not seen. 
Inflorescence terminal, of few-flowered clusters. Bracts caducous, not seen. 
Peduncle short (1 cm.) and thick; pedicels about 1.1 cm. long, pubescent, thickening 
toward the tip. Sheath bilabiate, 2.5 cm. long, deeply cleft on one side, minutely 
pubescent, the lobes obtuse. Receptacle tube obconical, 1.8 cm. long, 6.7 mm. in 
diameter at tip, glabrescent. Calyx lobes 4, 2.5 cm. long, obtuse at tip, the anterior 
1.2 cm. broad, the others about half narrower. Petals 5, obovate, attenuate into a long 
claw, 3.7 to 4. cm. long, 9 to 11 mm. broad, pink. Stamens 10 or 11, 3.8 to 4 cm. long, 
connate for more than half their length, minutely pubescent, often reduced to broad 
staminodes; anthers ovate. Pistil 6 cm. long, long-stipitate; ovary 8 to 10 mm. long, 
10 to 12-ovulate, whitish pubescent; style glabrous; stigma capitellate, papillose, 
dark purple. 
Pods stipitate, glabrous, 12 to 18 cm. long, 1.5 cm. broad. Seeds ovate, thin, nar- 
rowly winged, about 2 cm. long and 1 cm. broad, germinating in the pod. 
Type in the U. 8, National Herbarium, no. 602100, collected near Palmasola, State 
of Lara, Venezuela, near sea level in the forests around the Aroa River, flowers and 
fruits, June 27, 1913, by H. Pittier (no. 6366). 
This species departs from all those hitherto described by two important characters, 
viz, the very short and broad leaflets, and the narrow, elongate pods. It grows in 
the dense woods of the coastal plain at the entrance of the Aroa valley, mixed with 
B. aroensis. The natives distinguish it from the latter, which they call “rosa macho,”’ 
by the name of “rosa guaraba.’’ 
4. Brownea aroensis Pittier, sp. nov. 
A forest tree up to 15 meters high, the trunk up to 40 cm. in diameter at the base. 
Leaves 2 to 6-jugate; rachis 8 to 25 cm. long, slender, subangulate, glabrous or 
sparsely pubescent; petioles 6 to 20 mm. long; leaflets opposite, glabrous, very vari- 
able in size in different parts of the tree; petiolules 4 to 5 mm. long; leaflet blades 
elliptic, 5 to 11 cm. long, 2 to 4.5 cm. broad, oblique, the basal pair smaller, rounded 
(and ovate), or more or less emarginate at the base, the following leaflets (almost oppo- 
site) oblique, with the acute half on the outside, a glandule inserted on the side of 
the costa at the base. Stipules not seen. 
Floral clusters single, pendent, few-flowered (10 flowers or less), growing from the 
stems or limbs or at the end of the branchlets. Peduncles rather slender, 1.5 cm. 
long, pubescent. Bracts few, caducous. Pedicels 1.5 cm. long, minutely pubescent. 
Sheath 2.8 cm. long, deeply cleft on one side, minutely pubescent without. Recep- 
tacular tube obconical, 2.5 cm. long, about 5 mm. in diameter at tip, minutely pubes- 
cent. Sepals 4, 2.7 cm. long, obtuse, glabrous, the anterior one 8 mm., the remaining 
ones 5 to 6 mm. broad. Petals 5, obovate, obtuse, 5 cm. long, 1.3 cm. broad, pink, 
attenuate into a claw 1.5 cm. long. Stamens 11, 4.7 to 5 cm. long, connate into a 
