FABACEAE 653 
form. Style bearded. Stigma oblique or lateral. Pod slightly flattened, straight or 
curved. Seeds with rounded ends. Wirp BEAN. BEAN-vVINE. 
Stems trailing: leaflets mostly broader than long. l. P. sinuatus. 
Stems climbing ; leaflets mostly longer than broad. 
Blade of the terminal leaflet not hastate. 2. P. polystachyus. 
Blade of the terminal leaflet hastate. 3. P. smilacifolius. 
1. Phaseolus sinuàtus Nutt. Foliage glabrous or nearly so. Stems trailing, 1-4 
m. long, branching: leaflets 3, the blades deltoid-ovate in outline with 3 more or less 
prominent lobes, 2-4 cm. long, reticulated, mucronulate, truncate or very broadly cuneate 
at the base: racemes several times longer than the subtending leaves, simple ; rachis wire- 
like: pedicels 5-10 mm. long: calyx campanulate, 2.5-3 mm. long; lobes rounded or 
apiculate : corolla pale purple ; standard with a blade nearly 1 cm. wide: pods somewhat 
scimitar-shaped, 3.5-4 cm. long. 
In dry pine lands or hammocks, Florida to Mississippi. Summer. 
2. Phaseolus polystáchyus (L.) B.S.P. Foliage minutely pubescent. Stems climb- 
ing, 1-4 m. long, branching : leaflets 3, the blades ovate to orbicular-ovate, 4-10 cm. long, 
acuminate, often conspicuously nerved, rounded or subcordate at the base: racemes or 
panicles slender, surpassing the subtending leaves, simple or compound, short-peduncled : 
pedicels 4-8 mm. long: calyx campanulate, 2.5-3 mm. long; lobes rounded or somewhat 
triangular: corolla purple or whitish : pods scimitar-shaped, 4-8 em. long, often glaucous. 
[P. perennis Walt. ] 
In thickets, Canada to Minnesota, Florida, Louisiana and Nebraska. Summer. 
3. Phaseolus smilacifdlius Pollard. Foliage minutely pubescent. Stems twining, 
1-4 m. long, branching: leaflets 3, the blades very thin, ovate in outline, 4-8 cm. long, 
acute, more or less distinctly 3-lobed, soon glabrous: racemes usually shorter than the sub- 
tending leaves : pedicels slender, 5-15 mm. long : calyx glabrous, campanulate, 2.5-3 mm. 
long; lobes rounded: corolla pink or white ; keel-petals 1 cm. long; standard with a 
broad blade nearly 1 em. long: pods 5-6 cm. long. 
In hammocks, Florida. Summer and fall. 
51. STROPHOSTYLES Ell. 
Annual or perennial herbaceous vines, with trailing or twining stems. Leaves alter- 
nate: blades pinnately 3-foliolate, stipulate: leaflets with thickish, entire or lobed 
blades. Flowers perfect, in clusters terminating long axillary peduncles. Calyx sessile 
or short-pedicelled : lobes 5, equal or the upper 2 more or less united. Corolla white or 
pink-purple: standard with a blade about as broad as long: wings broadened upward : 
keel-petals curved. Stamens 10, diadelphous (9 and 1). Anthers similar. Style bent, 
bearded, persistent. Pod narrow, somewhat flattened, straight or nearly so. Seeds truncate, 
smooth or granular. WILD BEAN. 
yon E 1. S. umbellata. 
Leaflets fully thrice as long as broad. 2. S. pauciflora. 
Leatlets less than twice as long as broad. 
Stems 1-2 m. long, trailing or low-twining: leaflets, or some of them, with lobed 
blades. : 3. S. helvola. 
Stems 3-9 m. long, high-climbing : leaflets with entire blades. 4. S. Missouriensis. 
1. Strophostyles umbellàta (Muhl.) Britton. Perennial, more or less pubescent. 
Stems trailing, 3-15 dm. long, branching : leaflets 3, the blades oblong-lanceolate, varying 
to ovate or lanceolate, 1-4 cm. long, obtuse or acute, sometimes slightly lobed : peduncle 
6 times longer than the subtending leaf-like bracts: pedicels very short: calyx broadly 
campanulate, 2.5-3 mm. long, the lower lobe acute, somewhat shorter than the tube : co- 
rolla pink or pale purple, often fading yellowish ; standard with a blade 1-2 cm. broad : 
pods linear, slightly flattened, 2.5-5 cm. long, straight. 
In dry sandy soil, New York to Missouri, Florida and Louisiana. Summer and fall. 
2. Strophostyles paucifldra (Benth.) S. Wats. Annual, minutely pubescent. 
Stems trailing or climbing, 3-9 dm. long, branching : leaflets 3, the blades linear to lanceo- 
late, 1.5-3.5 cm. long, apiculate at the apex, scarcely ever Jobed, short-stalked : peduncles 
Surpassing the subtending leaves : pedicels very short: calyx hirsute, about 1.5 mm. long, 
the lower lobes slender, about as long as the tube : corolla pale purple i standard with a 
blade less than 1 cm. broad : pods linear, flattish, 2-3 cm. long, strigose. 
On river banks, Minnesota to Indiana, Nebraska, Louisiana and Texas. Summer and fall. 
b 3. Strophostyles hélvola (L.) EH. Annual, often villous-hirsute. Stems often 
ranching at the base ; branches trailing, 3-12 dm. long, widely branching : leaflets 3, the 
