602 FABACEAE 
with slightly different blades. 3. C. sagittalis. 
** Stems and peduncles with short appressed hairs: lower and upper leaves 
with very different blades. C. Purshii. 
a. Standard with a blade nearly or quite 2 em. broad: blades of the upper leaves 
of aspatulate or oblanceolate type: stipules not decurrent. 
Bracts minute, caducous. 5. C. retusa. 
Bracts ovate, cordate, persistent. 6. C. spectabilis. 
7 
Ds 
B. Leaves with 3-foliolate blades. 
Plants annual: keel-petals over 1 em. long: pods 2.5-3.5 mm. long. . C. incana. 
Plants perennial: keel-petals less than 1 em. long : pods 1-1.5 em. long. 8. C. pumila. 
1. Crotalaria rotundifólia ( Walt.) Poir. Perennial, conspicuously pubescent. Stems 
tufted, often densely so, more or less spreading, 1-4 dm. long, like the peduncles pubescent 
with loose or spreading hairs: leaves alternate ; leaflets solitary, the blades entire, mostly 
orbicular or obovate near the base of the plant, oval, oval-ovate or broadly oblong above, 
obtuse or mucronulate, hairy on both sides, sometimes glaucescent beneath, short-petioled : 
calyx pubescent with relatively long loose hairs ; lobes of the lower lip about 10 em. long, 
slenderly acuminate : corolla yellow : standard with a blade 9-12 mm. broad : pods oblong, 
2-3 em. long. 
In dry or sandy soil, Virginia to Florida and Mississippi. Spring to fall. 
2. Crotalaria marítima Chapm. Perennial, similar to C. rotundifolia in habit, but 
slightly smaller and inconspicuously pubescent. Stems pubescent with short appressed 
hairs: leaves alternate ; leaflets solitary, the blades entire, suborbicular to oval on the 
lower part of the stems, somewhat narrower above, obtuse or acutish, sparingly pubescent, 
short-petioled : stipules mostly deeurrent but narrow: calyx pubescent with short closely 
appressed hairs ; lobes of the lower lip mostly less than 10 mm. long, slightly acuminate: 
corolla smaller than that of C. rotundifolia: pods 1.5-2.5 cm. long. 
In pine lands, Florida to Mississippi. Spring and summer. 
3. Crotalaria sagittàlis L. Annual, or perennial south ward, conspicuously pubescent. 
Stems more or less tufted, 1—5 dm. tall, erect or ascending, often branched above, like the 
peduncles with loose or spreading hairs: leaflets solitary, the blades oblong to lanceolate 
or linear-lanceolate, 2-6 cm. long, often abruptly acute, sessile or nearly so : stipules de- 
current, usually broad and conspicuous: calyx rather shaggy-pubescent; lobes of the 
lower lip 10 mm. long or nearly so, somewhat acuminate : corolla yellow ; standard with a 
blade 6-11 mm. broad: pods 2.5-4 em. long. 
In dry soil, New England to Minnesota, Florida and Texas. Spring to fall. 
4. Crotalaria Pürshii DC. Perennial, similar to C. sagittalis in habit, but rather 
fleshy and inconspicuously pubescent. Stems more or less tufted, 1-5 dm. long, often 
branched, like the peduncles with short appressed hairs: leaflets solitary, the blades 
various, those of the lower leaves spatulate or oblanceolate, those of the upper ones linear, 
often narrowly so and much elongated, sometimes 12 cm. long, but usually prod 
stipules mostly decurrent, narrow : calyx pubescent with appressed hairs; lobes of t i 
lower lip commonly over 10 mm. long, slenderly acuminate : corolla yellow; standa 
with a blade 9-13 mm. broad : pods 2-3 cm. long. 
In grassy pine lands or sandy soil, Georgia and Florida to Louisiana. Spring to fall. 
5. Crotalaria retusa L. Annual, stout. Stems 4-9 dm. tall, more or less branched, 
finely and softly pubescent : leaflets solitary, the blades cuneate to oblanceolate, 3-9.5 S 
long, rounded or retuse at the apex, often glabrous above, more or less pubescent beneat ls 
short-petioled : stipules minute: racemes conspicuous, several-many-flowered : p 
5-10 mm. long, subtended by minute caducous bracts: calyx finely pubescent ; ice yee 
upper lip triangular-lanceolate, those of the lower lip lanceolate: corolla relatively yid : 
yellow ; standard with a blade usually about 20 mm. broad : pods 3-5 em. long, sprea mg 
or drooping. 
In sand or sandy soil, peninsular Florida and the Keys. Also in tropical America. i8 
6. Crotalaria spectabilis Roth. Similar to C. retusa but rather larger. Stems is 
dm. tall, leafy, pale-pubescent : leaflets solitary, the blades dark green above, pale rgo d 
often minutely Beistle-tipped : stipules small but broad : flowers nearly similar to t orate 
C. retusa, but commonly slightly smaller: pedicels clavate, subtended by ovate-cor 
acuminate bracts. 
In sand or sandy soil, Key West, Florida. Also in tropical America. 
7. Crotalaria incàna L. Annual, minutely pubescent. Stems "3.5 cm. 
5-13 dm. tall: leaves often numerous ; leaflets 3, the blades oval to obovate, 1-3. ally 
long, rounded or truncate at the apex, sometimes glabrous: the terminal one ow : 
shorter than the petiole: calyx becoming 10-12 mm. long: corolla greenish ye , 
standard over 10 mm. long: pods 2.5-4 cm. long. , 
In sand or sandy soil, peninsular Florida and the Keys to Texas. Alsoin tropical America. 
more or less branched, 
