178 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
As further illustrating the characters of this section, there are here repro- 
duced photographs of three additional species, Inga myriantha Poepp. & Endl. 
(pl. 85), I. sertulifera DC. (pl. 86), and I. umbellifera (Vahl) Steud. (pl. 87). 
EXPLANATION OF PLATES 85-87.—PI. 85, specimen of Inga myriantha in the Gray Her- 
barium, collected on the southern bank of the Amazon at the mouth of the Solimdes River, 
June, 1851, by R. Spruce (no. 1706). Pl. 86, specimen of Inga sertulifera in the Gray 
Herbarium, collected in the vicinity of Para, Brazil, by R. Spruce. Pl. 87, a specimen of 
the type collection of Inga umbellifera in the Gray Herbarium, collected near Panuré, 
along the Rio Uaupés, French Guiana, by R. Spruce (no. 2566). All natural size. 
Section 2. DIADEMA. 
NEW SPECIES. 
Inga radians Pittier, sp. nov. 
A tree; branchlets multilenticellate, more or less angulate, the young shoots 
more or less ferruginous-puberulous. 
Leaves petiolate, almost glabrous; rachis remotely hairy or glabrous, 
obscurely marginate, 10 to 14 cm. long, the petiolar part 1.5 em. long; stipules 
obovate, often oblique, rounded or acute at the apex, glabrous, persistent, about 
1.5 em. long, 0.6 cm. broad; leaflets 3 or rarely 4-jugate, petiolulate; glands 
stipitate, often reduced to the basal one or all obsolete; petiolules 5 mm. long, 
winged, pubescent; leaflet blades elliptic, elliptic-ovate, or ovate, rounded or 
subcuneate at the base, long-acuminate at the apex, glabrous, light green above, 
pale green beneath, those of the basal pair 7 to 12 em. long, 4 to 5 em. broad, 
those of the apical pair 17 to 18 cm. long, 6 to 7.5 em. broad. 
Inflorescences paniculate at the ends of the branchlets, the umbels long- 
pedunculate, 1, 2, or 3 in the axils of the leaves; peduncles 8 to 12 em. long, 
striate, minutely and sparsely puberulous; bractlets naviculiform, caducous, 
about 2 mm. long, the reflexed tip acute; pedicels about 2 mm. long, glabrous 
or sparsely puberulous; calyx 2.3 mm. long, sparsely pubescent, the teeth 
mostly 6, 0.3 to 0.4 mm. long, separated by rounded sinuses; corolla tubular- 
funnelform, 8 to 8.5 mm. long, the lobes 1.5 to 2 mm. long, the apices rounded, 
inflexed, covered with minute glandular hairs; staminal tube hardly exserted ; 
ovary glabrous, elongate (nearly 3 mm. long), substipitate; style as long as 
the stamens. 
Legume pedunculate, rounded at the base, obtuse at the apex, glabrous, 
40 cm, long or less, 8 em. thick, 6.5 to 8.5 em. broad, the margins thick, 1.2 to 
1.5 em, broad; seeds about 15, ovoid-oblong, slightly depressed, surrounded 
with a white, sweet pulp. 
Type in the U. 8. National Herbarium, no. 408524, collected at Tapachula, 
State of Chiapas, Mexico, in coffee plantations, flowers, April 26, 1902, by O. F. 
Cook (na, 805). 
A second specimen in the same herbarium is from Oaxaca, State of Oaxaca, 
alt. 1,650 meters, flowers, December, 1900, Conzatti & Gonzales 1146. 
This beautiful species, used as a shade tree in the coffee plantations of 
Central America and Mexico under the name of “ cuajiniquil,” belongs to the 
group of Inga cordistipula Mart. 
The drawings given by Preuss* under the name of Inga paterno Harms 
probably refer to this and not to Harms’s species. The two species differ 
mainly by the legumes, short and stipitate in J. paterno, very long and rounded 
at the base in I. radians. Besides the fruit characters, we find that in I. radians 
‘Preuss, Paul. Expedition nach Central- und Siidamerika. 355. pls. 8, 9. 
1901, 
