104. CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Related, perhaps, to C’. patellaria, which it resembles in the sessile petiolar glands, 
but from which it differs conspicuously enough in the slender, simple or nearly simple 
stems with appressed pubescence, and in the small, subcoriaceous leaflets which are 
very oblique at the base. 
Chamaecrista stenocarpa (Vog.) Standley. 
Cassia stenocarpa Vog. Gen. Cass. Syn. 68. 1837. 
Chamaecrista tagera (L.) Standley. 
Cassia tagera L. Sp. Pl. 538. 1753. 
NEW OR NOTABLE MIMOSACEAE FROM PANAMA. 
This characteristically tropical family is well represented in Panama 
by both herbaceous and woody forms. <A new species each of Cal- 
liandra, Morongia, and Mimosa is described here. An old subspecies 
of Mimosa published by Bentham appears to deserve specific rank 
and is redescribed. 
Calliandra pittieri Standley, sp. nov. 
A tree with a flat crown; branches grayish or yellowish green, smooth, the younger 
ones puberulent and sparingly appressed-pilose with tawny hairs; stipules persistent, 
linear-lanceolate, acute, 3 mm. long, ciliolate, slightly puberulent; rachis of the leaf 
45 to 105 mm. long, slender, densely cinereous-puberulent; pinnz 7 to 11 pairs, 20 to 
55 mm. long; leaflets 20 to 65 pairs, linear or oblong-linear, 3 to 5 mm. long, less than 
1 mm. wide, acute to obtuse, minutely scabrous-ciliolate with a few longer hairs 
interspersed, otherwise glabrous, rather prominently veined, the midvein nearly 
central, pale green, lustrous on the upper surface; inflorescence axillary, the solitary 
or clustered peduncles slender or stout, 15 to 45 mm. long, sparingly puberulent; 
flowers rather few in each head, sessile; calyx 1.25 mm. long, campanulate, glabrous 
or obscurely puberulent, the teeth very short and separated by broad sinuses; corolla 
short-funnelform, 5 to 6 mm. long, sparingly short-puberulent or appressed-pilose, 
the lobes oblong-lanceolate, obtuse; stamens pink, about 3 cm. long; fruit densely 
pubescent with short yellow hairs, the margins very thick, the valves coriaceous 
(only imperfect specimens seen). 
Type in the U. 8S. National Herbarium, no. 531146, collected at La Esmeralda, 
near Jamundi, Cauca Valley, State of Cauca, Colombia, at an altitude of 1,200 meters, 
January, 1905, by H. Pittier (no. 951). 
Apparently the same is a specimen in flower, collected near Cana, Panama, in 1908 
by R. 8. Williams (no. 707). This is from a small tree nearly 5 meters high, with a 
trunk 10 cm. in diameter. The Panama plant has slightly smaller and more obtuse 
leaflets than the type, but seems not to differ otherwise. 
The proposed species is related to Calliandra purdiaei Benth., but differs in having 
much smaller flowers as well as more numerous and smaller leaflets. 
Mimosa panamensis (Benth.) Standley. 
Minvosa debilis panamensis Benth. Trans, Linn. Soe. Bot. 80: 391. 1875. 
Stems slender, prostrate, sparingly setose-hirsute, abundantly armed with stout 
recurved spines 4 mm. long or less; stipules linear, rigid, 4 mm. long, strongly nerved, 
pectinate-ciliate; petioles 15 to 25 mm. long, sparingly setose and bearing a few very 
slender spines; pinnz a single pair, each consisting of 2 pairs of leaflets, the inner 
leaflet of the lower pair much reduced; leaflets oblong-obovate, 8 to 18 mm. long, 
4 to 7 mm. wide, very unequal at the base, but the midvein only slightly excentric, 
from rounded to acutish at the apex, mucronate, short-strigose on the upper surface, 
beneath more densely strigose; peduncles slender, 12 to 35 mm. long, glabrous; bracts 
