TRIFOLIUM. 



seeded, and something longer than the calyx. — Herbaceous 

 plants. Leaflets 3-nate or quinate. Flowers capitate, some- 

 times with a cup-shaped involucre. 



492. T. alpinum Linn. sp. pi. 1080. Sturm deutscld.fi. i. 

 fasc. 15. DC. prodr. ii. 204. Hall. helv. n. 369. — Alps of 



Europe. 



Quite smooth. Stems very short, thick, subterraneous. Petioles 

 long; leaflets 3, linear-lanceolate, rather obtuse, toothletted ; stipules 

 very long and narrow, linear, acute. Heads umbellate, on long stalks ; 

 pedicels very small, rather whorled. Calyx campanulate; the segments 

 equal, very long, setaceous," much shorter than the corolla. Legumes 

 2-seeded. DC. — The roots possess the same properties as liquorice. 



PSORALEA. 



Sepals 5, combined to the middle into a permanent 5-cleft 

 calyx ; the tube usually covered with glands ; divisions acumi- 

 nated, the lowest one sometimes longer than the others. Sta- 

 mens 10, usually diadelphous (9 and 1), the tenth sometimes 

 connected with the others at the base. Legume the length of 

 the calyx, indehiscent, 1 -seeded, sometimes ending in a beak. — 

 Shrubs or herbaceous plants, usually warted from glandular tu- 

 bercles. Leaves of various forms. Stipules adnate to the base 

 of the petiole. Inflorescence various. Flowers blue, white, or 

 purple. W. and A. 



493. P. corylifolia Linn. sp. pi. 1075. Burm.fi. ind. 172 t. 49. 

 DC. prodr. ii. 218. W. and A. i. 198. — Various parts of 

 India. 



Herbaceous, erect. Leaves simple, roundish-ovate, occasionally 

 slightly cordate at the base, repand-toothed ; stipules narrow-lanceolate, 

 recurved. Racemes dense, spike-like, usually short and capituliform, 

 on long axillary solitary peduncles. Pedicels much shorter than the 

 calyx, about three together from each bractea. W. and A. — Seeds con- 

 sidered in India stomachic and deobstruent. 



INDIGOFERA. 



Calyx 5-cleft ; segments acute. Vexillum roundish, emargi- 

 nate : keel furnished with a subulate spur on both sides, at 

 length often bending back elastically. Stamens diadelphous 

 (9 and 1). Style filiform, glabrous. Legume continuous, 1 or 

 more-seeded, 2-valved. Seeds usually truncated, separated by 

 cellular spurious partitions. — Herbaceous or shrubby. Stipules 

 small, free from the petiole. Peduncles axillary. Flowers ra- 

 cemose, purple, blue, or white ; many of the upper ones of each 

 raceme frequently becoming abortive. Leaves various, usually 

 unequally pinnated or digitate : hairs, either all or some of 

 them, adpressed and attached by their middle. W. and A. 

 241 r 



