Indigofera.} xlvii. § PAPiLiONACEiE (baker). 99 



Lower Guinea. Highlands of PungQ Andongo, Angola, Dr. Welwitsck! 

 Very near I. tinctoria, from which it differs principally in the pod. 



90. I. orthocarpa, Baker. A copiously branched shrub with 

 woody angular thinly silvery branches. Stipules small, setaceous. 

 Petioles J in. long-, firm, erecto-patent. Leaves 2-3 in. long, leaflets 

 4-6 pairs, obovate, J-f in. long, about half as broad, both sides per- 

 manently thinly silvery, lateral ones opposite, short-stalked, turning 

 blackish when dried. Racemes sessile, 12-20-flowered, about an inch 

 long when in flower, ultimately equalling the leaves. Pedicel equal- 

 ling the silvery calyx, which is half a line deep, the teeth lanceolate, 

 reaching halfway down. Corolla yellow, four times as long as the 

 calyx. Pod deflexed, 1-1 J in. long, \ in. broad, straight, subterete, 

 naked, 8-12-seeded. — /. Anil. var. ortJwcarpa, DC. Prod. ii. 225. 



North Central. Kouka, E. Vogel! 



Nile Land. Nubia, Kordofan, Sennaar, and banks of the Blue Nile at Khartoum 

 Kotschy ! 



Habit of /. Anil, but the leaves fewer and more argenteoup, and in the straight pod 

 and number of seeds agreeing with I. tinctoria. 



91. I. tinctoria, Linn. ; DC. Prod. ii. 221. A copiously branched 

 shrub 4-6 ft. high, the branches straight or flexuose, sulcate, thinly 

 silky. Stipules small, setaceous. Petioles J-l in. long, firm, erecto- 

 patent. Leaves 2-3 in. long, with leaflets 4-6 pairs, oblong or ob- 

 ovate, J-f in. long, both sides subglaucous and thinly silvery, the 

 lateral ones opposite, short-stalked, turning slightly blackish when 

 dried. Racemes axillary, lax, about 20-flowered, ultimately equalling 

 or a little exceeding the leaves. Pedicel shorter than the silvery calyx, 

 which is more than half a line deep, teeth lanceolate, reaching- half- 

 way down. Corolla more than two lines long, yellow or purplish. 

 Pods deflexed, 1—1 J in. long, J in. thick, subterete, straight or nearly 

 so, glabrous when mature, 8-12-seeded. — Wight. Ic. ii. t. 315. Guill. 

 et Pen*. Fl. Seneg. i. 178. /. indiea, Lam. Encycl. iii. 245. /. ornitho- 

 podioides, Schum. et Thonn. PI. Guin. 372. 



Universally cultivated. Wild in Senegambia, and perhaps elsewhere. 



92. I. emarginella, Steud. in Schimp. Hb. Abyss. No. 735. A woody 

 erect shrub 3-4 ft. high, with firm terete branches, only thinly pubes- 

 cent upwards, not at all silky or argenteous. Stipules linear-setaceous. 

 Petioles J in. long, erecto-patent. Leaves with usually 4 pairs of 

 elliptical or obovate leaflets, J-l in. long, the apex rounded and dis- 

 tinctly mucronate, the lateral ones contiguous, opposite, distinctly 

 stalked with minute setaceous stipellee, texture subcoriaceous, upper 

 surface green, lower glaucous, both when mature glabrous. Flowers 

 in dense nearly or quite sessile axillary conical racemes 12-18 lines 

 long. Calyx | line deep, obliquely campanulate, thinly clothed with 

 brownish pubescence, the teeth deltoid. Corolla \ in. long, bright 

 yellow when fresh, brown when dried, the oblong standard glabrous 

 externally. Pods deflexed, linear, mucronate, J-f in. ^long, 1 line 

 broad, nearly straight, terete, glabrous when mature, 6-8-seeded.— 



