432 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
conspicuous, triangular-lanceolate, acute, striate, ciliate, pilose; calyx sub- 
sessile, 2 mm. long, glabrous, cleft nearly to the base into triangular-oblong 
acutish lobes; corolla glabrous, about 4 mm. long, the lobes oblong, acute; 
stamens 15 to 20 mm. long; legumes about 8 em. long, 6 or 7 mm. wide, rounded- 
obtuse, short-beaked, attenuate at the base, densely pilose with tawny hairs, 
about 8-seeded. 
Type in the U. S. National Herbarium, no. 578114, collected in thickets near 
Nicoya, Costa Rica, in January, 1900, by A. Tonduz (Inst. Fis. Geogr. Costa 
Rica, no. 18536). Additional material is mounted on sheet 577750. 
Closely related to Calliandra portoricensis and C. tetragona, but easily dis- 
tinguished from both by the copious pubescence. In both of those species the 
fruit is glabrous. The leaflets are similar in form to those of C. tetragona, 
being broader than those of C. portoricensis, 
Mimosa maxonii Standley, sp. nov. 
A vine with slender terete green glabrous branches armed with numerous 
slender recurved spines 2 mm. long; stipules triangular-lanceolate, 3 to 4 mm. 
long, prominently nerved, pectinate-ciliate; petioles 30 to 55 mm. long, slender, 
glabrous, bearing very numerous slender recurved spines; pinne 2 pairs, their 
rachises about 1 cm. long, slightly puberulent, yellow-setose at the point of 
insertion of the leaflets; leaflets 2 pairs, unequal, the inner leaflet of the lower 
pair much reduced, all elliptic-lanceolate or oblong-lanceolate, 38 mm. long or 
less, 4 to 11 mm. wide, acute or acuminate, rounded or obtuse and very unequal 
at the base, with a strongly excentric midvein, glabrous on the upper surface, 
beneath glabrous or with a few scattered setose-strigose yellowish hairs, the 
margin appearing nerved from the presence of a Series of overlapping spiny- 
strigose hairs; peduncles 10 to 27 mm. long, divergent or ascending, stout, 
sparingly spiny; bracts of the spherical inflorescence (5 to 6 mm. in diameter) 
linear-lanceolate, about equaling the flowers, each with a rigid subulate tip; 
corolla glabrous, smooth, 2 mm. long; stamens 5: fruit oblong or narrowly 
oblong, 18 to 25 mm. long, 6 to 8 mm. wide, obtuse or abruptly acute, bearing a 
beak 1 mm. long, subsessile, 2 to 4-seeded, Spiny-setose on the margins, the 
spreading sete 3 to 5 mm. long, the valves finely and very densely velvety- 
pubescent, articulate. 
Type in the U. 8S. National Herbarium, no. 473478, collected in the vicinity 
of Mazatenango, Guatemala, altitude about 350 meters, February 20, 1905, by 
William R. Maxon and Robert Hay (no. 3497). 
Related to Mimosa velloziana Mart., but readily distinguished by the velvety- 
pubescent valves of the fruit. 
Erythrina lanceolata Standley, sp. nov. 
A small, densely branched tree; branches slender, grayish, closely armed with 
stout, dark brown spines about 4 mm. long; petioles slender, striate, 45 to 
GO mm. long, swollen at the base, armed with numerous short stout spines, 
glabrous; petiolules stout, 5 or 6 mm. long; leaflets rather thick and firm, 
dull green, lanceolate or rhombic-lanceolate, 7 to 11 em. long, 28 to 44 mm. 
broad, rather abruptly acuminate, cuneate or broadly cuneate at the base, 
glabrous, 3-nerved, with a few lateral nerves from the wmidvein, the veins 
conspicuous and more or less reticulate, the lateral leaflets slightly smaller 
than the terminal one and inequilateral; racemes 5 to 17 em. long, rather 
slender, few-flowered, the rachises at first tomentulose but soon glabrate; 
pedicels 5 mm. long or shorter; calyx tubular-campanulate, 8 mm. long or 
less, obtuse at the base, shallowly 2-lipped, the upper lip retuse, obscurely 
tomentulose, soon glabrate; banner green and red, about 6 cm. long, 9 mm. 
wide, linear-oblong, straight, glabrous; keel petals distinct, 45 mm. long, 
