174 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
lections of the genus, at least two of which represent undescribed 
species. 
KEY TO THE SPECIES. 
Seeds 12 to 15 mm. long, strongly compressed; leaflets mostly oblong or lance- 
oblong, 1 to 1.5 cm. wide. Upper suture of the fruit convex__1. A. arsenii. 
Seeds 5 to 7 mm, long, turgid; leaflets mostly ovate to rounded-oval, usually 2.5 
to 5.5 cm. wide. ; 
Upper suture of the fruit straight or concave; seeds about 5 mm. long; leaf- 
lets oval or rounded-oval_ - _ ---_.-2. A. pterocarpa. 
Upper suture of the fruit convex; seeds about 7 mm, long; leaflets mostly ob- 
lique-ovate_ — wooo 3. A. insularis. 
1. Ateleia arsenii Standl., sp. nov. 
Branchlets copiously tomentose, especially when young, with fulvous hairs ; 
rachis of the leaf 7 to 19 cm. long; leaflets about 15, oblong, lance-oblong, or 
ovate-oblong, 2.5 to 4.8 cm. long, 1 to 1.5 em. wide, broadly and obliquely 
rounded at the base, rounded or very obtuse at the apex, coriaceous, with 
prominulous, finely reticulate venation, at first short-pilose on the upper surface, 
but glabrate in age, tomentose beneath when young, the pubescence scant in 
age; racemes very numerous, 8 to 14 cm. long, loosely many-flowered, the bracts 
minute, linear-subulate; calyx 4.5 mm. long, turbinate-campanulate, fulvous- 
tomentulose, very obscurely dentate or entire; blade of the standard petal 
rounded-oval, 8 to 9 mm. long, 7 to 8 mm. wide, pilose outside, abruptly decur- 
rent to a short slender claw, the margin of the blade irregularly crenulate; 
stamens only slightly longer than the calyx; fruit about 2.8 em. long and 1.6 
em. wide, glabrate, prominently reticulate-veined, abruptly decurrent at the 
base to a stipe 1.5 cm. long, the upper suture convex, sharply carinate but almost 
exalate; seeds 12 to 15 mm. long, 7.5 to 9 mm. wide, strongly compressed, 
castaneous. 
Type in the U. 8. National Herbarium, no, 1000106, collected on Pico de 
Quinceo, near Morelia, Michoacin, in 1910, by Brother G. Arséne (no. 6655). 
This specimen consists of fruiting material. Another collection, in flower, was 
obtained upon the same mountain, at an altitude of 2,800 meters, March 11, 
1909, by Brother Arséne (no. 2790). 
Readily distinguished from the other Mexican species by the large, flat seeds 
and small, narrow leaflets. This is the only species of which the writer has 
seen flowers. 
It is a pleasure to be able to name this well-marked species in honor of one 
of the most assiduous collectors of Mexican plants. During about eight years’ 
residence in Mexico Brother Arséne obtained one of the largest series of the 
plants of that country ever secured by one collector. This consists of nearly 
eleven thousand numbers of flowering plants, chiefly from the states of Puebla 
and Michoacan, besides a large quantity of cryptogams. Through the gener- 
osity of Brother Arséne, the most complete series of these collections has now 
been deposited in the National Herbarium. 
2. Ateleia pterocarpa DC. Prodr. 2: 419. 1825. 
Pterocarpus ateleia Moc. & Sessé; DC. Prodr. 2: 419. 1825, as synonym. 
This, the type species of the genus, was based upon one of Sessé and Mocifio’s 
drawings,’ and De Candolle gives the locality merely as Mexico. In the second 
edition of their Flora Mexicana? Sessé and Mocifio give a long description of 
*Calq. Dess. Fl. Mex. pl. 288, pl. XXV, A. * 164. 1894. 
