PA PI LION A CEA E. 569 



elongated, incurved, hairy along the inner side; pod stalked in the calyx, linear or 

 linear-oblong, flattened, 2-valved, partly septate between the seeds. About 30 

 species, natives of warm and temperate regions. The following is the only one 

 known to inhabit N. Am. 



I. Clitoria Mariana L. BUTTERFLY-PEA. (I. F. f. 2224.) Erect or ascend- 

 ing, sometimes twining, glabrous or nearly so, 3-9 dm. high. Stipules ovate-lan- 

 ceolate, acute; leaflets stipellate, ovate-lanceolate or oblong-lanceolate, obtuse, mu- 

 cronate, 2.5-5 cm - l n g; peduncles short, i-3-flowered; bracts lanceolate, striate, 

 deciduous; flowers about 5 cm. long, very showy; calyx tubular, 12-17 mm. long, 

 its teeth ovate, acute ; corolla pale blue; pods acute, about 2.5 cm. long. Dry 

 soil, N. J., to Ha., Mo. and Tex. June-July. 



40. FALCATA Gmel. 



Twining perennial vines, with pinnately 3-foliolate leaves, small white or violet 

 flowers in axillary racemes, and also solitary apetalous fertile flowers in the lower 

 axils or on the slender creeping branches from the base. Calyx of the petaliferous 

 flowers tubular, 4-5 -toothed ; standard obovate, erect, folded around the other 

 petals; wings oblong, curved, adherent to the incurved obtuse keel; stamens dia- 

 delphous (9 and l); style filiform, not bearded; pods from the upper flowers linear- 

 oblong, several-seeded, 2-valved, those from the lower obovoid, fleshy, mainly 

 i -seeded. [Latin, referring to the curved keel of the corolla.] About 7 species, 

 natives of N. Am., eastern Asia and the Himalayas. Only the following in N. Am. 



Leaves thin ; bracts small ; plant pubescent or glabrate. i. f. comosa. 



Leaves firm ; bracts large ; plant villous-brown-pubescent. 2. F. Pitcheri. 



1. Falcata comosa (L.) Kuntze. WILD OR HOG PEA-NUT. (I. F. f. 2225.) 

 Slender, 3-24 dm. long. Stipules oblong or ovate, 4 mm. long, striate; leaflets 

 broadly ovate or rhombic-ovate, acute, rounded at the base, 2.5-8 cm. long; ra- 

 cemes of petaliferous flowers mainly simple ; bracts ovate, obtuse; flowers purplish 

 or white, 12-15 mm - l n gl pedicels equalling or exceeding the bracts; pods of the 

 petaliferous flowers about 2.5 cm. long, 6 mm. wide, pubescent, especially along 

 the margins. Moist thickets, N. B. to Fla.., Manitoba, Neb. and La. Aug.-Sept. 



2. Falcata Pitcheri (T. & G.) Kuntze. PITCHER'S HOG PEA-NUT. (L F. f. 

 2226.) Similar to the preceding, but generally stouter, villous-pubescent with 

 reflexed brown hairs. Leaflets larger and thicker, sometimes I dm. long; pedicels 

 mostly shorter than the nearly orbicular canescent bracts; ovary and pods of the 

 petaliferous flowers pubescent throughout; subterranean fruit less abundantly pro- 

 duced than in F. comosa; calyx larger. Moist thickets, Mass, to western N. Y., 

 S. Dak., Neb., Kans. and Tex. Aug.-Sept. 



41. APIOS Moench. 



Twining perennial vines, with pinnately 3-7-foliolate leaves, small stipules and 

 rather large brownish-purple or red flowers, mainly in axillary racemes or panicles. 

 Calyx campanulate, somewhat 2-lipped, the 2 lateral teeth very small, the 2 upper 

 united and short, the lower one long and acute. Standard ovate or orbicular, re- 

 flexed. Wings obliquely obovate, adherent to the elongated incurved at length 

 twisted keel. Stamens diadelphous (9 and i). Ovary nearly sessile, ovules oo ; 

 style slender. Pod linear, straight or slightly curved, compressed, 2-valved, many- 

 seeded. Rootstocks usually tuberous. [Greek, pear, from the shape of the 

 tubers.] Five known species, 2 of eastern N. Am., 2 of China and I of the 

 Himalayas. 



Standard suborbicular, rounded or retuse at the apex. i. A. Apios. 



Standard produced at apex into a thickened appendage. 2. A. Priceana. 



I. Apios Apios (L.) MacM. GROUND-NUT. (I. F. f. 2227.) Slender, pu- 

 bescent or glabrate. Stipules subulate, 2-4 mm. long, deciduous; leaves petioled; 

 leaflets 5-7 (rarely 3), ovate or ovate-lanceolate, acute or acutish, rounded at the 

 base, 2.5-8 cm. long; racemes often compound ; peduncles shorter than the leaves; 

 flowers numerous, odorous, about 12 mm. long; rachisof the inflorescence knobby; 

 pod pointed, 2. 5-10 cm. long, about 5 mm. wide. In moist ground, N. B. to Fla., 

 Out., Minn., Kans. and La. Stem with milky juice; tubers edible. July-Sept. 



