CROTALARIA, A NEW LEGUME FOR THE SOUTH D7 
15-30 cm. long; both sides thinly silky pubescent; racemes 15—20 cm. long, lax, 
6-10 flowered; calyx 2-2.5 cm. long, dense brown velvety pubescence, teeth 
linear, acuminate, very long; corolla yellow, little exserted; pod 4-5 cm. long, 
dense brown velvety pubescence; seed large, 5 mm. long, greenish black to 
nearly black. 
Grown in the greenhouse only, it seems to be less well adapted to 
United States conditions than many other species. 
Crotalaria usaramoensis Baker. 
Plant erect, 1-2 meters high, well branched; stems terete, lightly pubescent, 
woody with age; stipules very small; leaves trifoliolate; leaflets linear oblong, 
5-10 em. long and 1.5-4 cm. wide, apex subacuminate and base cuneate, 
glabrous above and below; flowers in long terminal racemes; calyx glabrous, 
tube 3.5 mm. long, truncate at base, teeth 15 mm. long; corolla yellow, 
standard 10-13 mm. long, striate with light purple lines, carina slightly longer 
than the standard; pod oblong cylindrical, 3.5 cm. long and 8 mm. wide, 
becoming black on weathering; seed small, 2 mm. long, amber to red, matures 
midlate. 
This species makes a good growth and is adapted to a wide range 
of conditions. It appears to be worthy of further attention for 
green manure, forage, and as an ornamental. Under conditions in 
the United States it has proved a very sparse seeder, dropping nearly 
all pods before maturity. At Gainesville, Fla., it has bloomed in 
June and continued in bloom throughout the season. At Columbia, 
S. C., it has bloomed in July, ripening some seed in August. In 
the Netherland East Indies it has been recognized as having forage 
value. 
Crotalaria valetonii Baker. a 
Plant semierect, bushy, 6-12 decimeters high, divaricately branched, lower 
branches long and spreading; stems terete, moderately branched, densely vil- 
lous; stipules wanting; leaves simple, long oval, 6-8 cm. long and 3-4 cm. 
wide, densely silky villous on both sides; racemes short, lateral, 2-12 flowered ; 
flowers 2-2.5 cm. long; calyx tube 3 mm. long; calyx teeth 10 mm. long, pubes- 
cent; corolla purplish yellow, standard decidedly longer than the wings or 
keel; pods oval, 1.5 cm. long, 1 cm. wide, thinly villous; seed large, 6-7 mm. 
long, light color, greenish or brownish yellow, matures late. 
This species appears to be quite oily throughout, but the quantity 
is not large enough to be of commercial importance. G. S. Jamie- 
son, of the Bureau of Chemistry and Soils, who examined pods and 
stems, reported his findings as follows: 
The Crotalaria valetonii pods have been found to contain 9.24 per cent of 
ceil, The oil which was extracted by petroleum ether was of a dark yellowish- 
brown color and very limpid. It has an iodine number of 88.2 by the Hanus 
method, a saponification value of 183.9, an acid value of 169.0, and a refractive 
index at 25° of 1.4670. The acid value was made within 15 hours after the 
extraction of the oil was completed. This product consists largely of free 
fatty acids which in terms of oleic acid amounts to about 85 per cent of the 
oil. On account of the small oil content, it would seem to have no commercial 
possibilities. 
The seed habits of this species are fairly good, and it has seeded 
well in southern Florida. However, the general habits of the plant 
do not make it especially desirable for forage. 
Crotalaria vallicola Baker. 
Plant erect, 6-12 decimeters high, moderately branched, stems cinereous- 
pubescent; stipules small or wanting; leaves trifoliolate; leaflets elliptic obo- 
vate to oblong obovate, the base tending to cuneate, 20-40 mm. long and 10-15 
