LEGUMINOS^l. LXXVIII. PSORALEA. LXXIX. INDIGOFERA. 



205 



of Madeira, not of America. P. Americana, Lin. spec. 1075. 

 Jacq. liort. scho3iib. 227. Lob. icon. 2. t. 31. f. 1. Flowers 

 white, but the keel is dark purple at the apex. Calyx glandular 

 and smoothish. 



far. p, i-illiisa; calyx glandular and villous. P. polysta- 

 chya, Poir. suppl. 4. p. 587. if the synonyme be rightly attached. 

 Native of Mauritania, near Alcassar. 



ZW/ierf-leaved Psoralea. Fl. Jul. Aug. Clt. 1640. Sh. 1 ft. 



58 P. PLICA V T.\ (Delil. fl. aegypt. p. 109. t. 37. f. 3.) brandies 

 waited from glands ; leaves pinnately trifoliate ; leaflets oblong- 

 lanceolate, plicate, repand-toothed ; spikes axillary, longer than 

 the leaves ; rachis permanent after the flowers have fallen, and 

 becoming hard and spinose. f? . G. Native of Upper Egypt, at 

 the foot of the mountains between Qournah and Medynet-abou. 



/YrtiW-leafletted Psoralea. Shrub 1 to 2 feet. 



59 P. OBTUSJFOLIA (D. C. prod. 2. p. 221.) branches and 

 K.ives clothed with adpressed canescent pubescence ; leaves tri- 

 foliate ; leaflets obovate, plicate, denticulated, the middle one 

 pctiolulate. fj . G. Native of the Cape of Good Hope. Burch. 

 cat. 1214. This plant is very much like the preceding species. 



Obtuse-leaved Psoralea. Shrub. 



f- Species not sufficiently known. 



60 P. ? RUBE'SCENS (Lour. coch. p. 444.) arboreous ; leaves 

 pinnate ; leaflets oblong-ovate ; peduncles lateral, many-flow- 

 ered ; calyx rather truncate, biglandular at the base. ^ G. 

 Native of Cochin-china, in woods. Flowers reddish -white. 



Rcddish-ftowered Psoralea. Tree 10 feet. 



61 P. ? SCUTELLA'TA (Lour. coch. p. 443.) arboreous ; leaves 

 impari-pinnate ; leaflets ovate, acuminated, glabrous ; spikes 

 crowded, nearly terminal ; calyx scutate, glandular. Pj . G. 

 Native of Cochin-china in woods. Flowers violaceous. Legume 

 1-2-seeded. 



/SViHcer-calyxed Psoralea. Tree 20 feet. 



62 P. ? HU'MILIS (Mill. diet. no. 7.) leaves impari-pinnate, 

 with 3 or 4 pairs of roundish, villous leaflets; heads of flowers 

 axillary and terminal. Tj . S. Native of Vera Cruz. Flowers 

 yellow, mixed with red. 



Humble Psoralea. Shrub 5 to 6 feet. 



63 P. ? SCA'NDENS (Mill. diet. no. 4.) leaves pinnate, with 3 

 pairs of oval obtuse leaflets ; racemes sessile, axillary ; stern 

 branched, climbing. Tj . v-) . S. Native of Campeachy. Flowers 

 blue. Perhaps a species of Gdlega. 



Climbing Psoralea. Shrub cl. 



64 P. ? PROSTRA'TA (Lin. amcen. 6. p. 93.) leaves glabrous, 

 supra-decompound, digitate ; lobes and lobules linear, middle 

 one trifid ; racemes axillary, pedunculate, roundish ; stem de- 

 cumbent. J? . G. Native of the Cape of Good Hope. Flowers 

 yellow. The plant has the habit of a species of Hermdnnia. 

 The stipulas are ovate and the stamens diadelphous. The le- 

 gume is unknown, therefore the genus is doubtful. 



Prostrate Psoralea. Shrub prostrate. 



Cult. All the species of this genus are rather elegant when 

 in bloom. The stove and greenhouse kinds grow best in a 

 mixture of loam and peat, and young cuttings root freely, if 

 planted in a pot of sand, with a bell-glass placed over them ; 

 those of the stove species in heat. The frame kinds, or those 

 natives of North America, grow best in peat and sand, and are 

 increased by seeds, or cuttings will strike root. 



LXXIX. INDIGO'FERA (indigo, a blue dye, stuff, which is 

 a corruption of Indicum, Indian, and fero, to bear ; the greater 

 part of this species of the genus produce indigo). Lin. gen. 889. 

 Lam. ill. 626. D. C. leg. mem. vr. prod. 2. p. 221. 



LIN. SYST. Diadelphia, Decdndria. Calyx 5-cleft ; lobes acute. 

 Vexillum roundish, emarginate (f. 33. a.}. Keel furnished with 

 a subulate spur on both sides, at length usually bending back 



elastically. Stamens diadelphous. Style filiform, glabrous. Le- 

 gume nearly terete (f. 33. c.), or flator-tetragonal, 2-valved, many- 

 seeded, rarely few-seeded or ovate, 1 -seeded at the base or sub- 

 globose. Seeds ovate, truncate at both ends, and usually separ- 

 ated from each other by cellular substance. Herbs or sub- 

 shrubs. Stipulas small, distinct from the petiole. Peduncles 

 axillary. Flowers disposed in racemes, purple, blue, or white. 

 Leaves impari-pinnate, digitate, or simple. Leaflets usually 

 stipellate at the base. The hairs on the plants usually ad- 

 pressed and fixed by their centre. 



1. Simplicifblia (from simplex, simple, and folium, a leaf; 

 in reference to the leaves of all the species contained in this 

 division being simple). Leaves simple, sessile, or standing on a 

 very short petiole. 



1 I. UNIFOLIA (Retz, obs. 4. p. 29. and 6. p. 33. t. 2.) leaves 

 obovate, obtuse, mucronate, hoary ; racemes axillary ; flowers 

 hardly pedicellate; legume ovate, globose, 1 -seeded. O- S. Na- 

 tive of the East Indies. Roxb. cor. 2. t. 195. Hedysarum lini- 

 folium, Lin. fil. suppl. 331. I. polygonoides, Wendl. Sphse- 

 ridiophorum, Desv. journ. 3. p. 125. t. 6. f. 35. Flowers red. 



Flax-leaved Indigo. Fl. July, Aug. Clt. 1792. PI. proc. 



2 I. TETRASPE'RMA (Vahl. ined. in herb. Juss. ex Pers. ench. 

 no. 6.) leaves simple, linear, acuminated, hoary ; flowers axil- 

 lary, usually solitary ; legume nearly terete, 4-seeded. O- S. 

 Native of Guinea. J. scoparia, Vahl. ined. ex herb. Puer. 

 Stem erect, branched, herbaceous. Flowers red. 



Four-seeded Indigo. PI. 1 foot. 



3 I. PANICULA V TA (Pers. ench. 2. p. 7.) leaves oblong-linear, 

 nearly naked ; peduncles shorter than the leaves, the alternate 

 ones terminal and panicled, elongated ; legume terete, cleflexed, 

 4-seeded, glabrous. Tj . S. Native of Guinea. Stem much 

 branched ; branches twiggy. Flowers red. 



Panicled Indigo. Shrub 1 to 2 feet. 



4 I. SIMPLICIFOLIA (Lam. diet. 3. p. 251.) leaves oblong- 

 linear, almost naked ; peduncles shorter than the leaves, each 

 bearing 3 or 4 remote flowers ; legume terete, tetragonal, mu- 

 cronate, erect, 12-16-seeded, glabrous. 1? . S. Native of Sierra 

 Leone. Stem erect, much branched ; branches twiggy. Leaves 

 an inch long. 



Simple-leaved Indigo. Shrub 1 to 2 feet. 



5 I. FILIFOLIA (Thunb. prod. 132. fl. cap. 595. but not of 

 Ker. ) leaves and branches filiform ; the strigae on the leaves, 

 branches, and calyxes are few and adpressed ; racemes pedun- 

 culate, few-flowered ; legume deflexed, filiform. fy . G. Na- 

 tive of the Cape of Good Hope. Flowers red or purple. 



Thread-leaved Indigo. Fl. July, Oct. Clt. 1812. Sh. 1 ft. 



6 I. OBLONGIFOLIA (Forsk. descr. 137. Vahl. symb. 1. p. 55.) 

 leaves simple, oblong, silky ; racemes axillary, 3-times longer 

 than the leaves ; calyx and vexillum villous. Jj . G. Native of 

 Arabia Felix at Lohajam. A decoction of the herb is used in 

 Egypt against the colic. 



Oblong-leaved Indigo. Shrub. 



7 I.? DEFRE'SSA (Thunb. prod. 132. fl. cap. 596.) leaves 

 ovate, silky ; branches stiff, pubescent ; spikes terminal, leafy, 

 silky. f? . G. Native of the Cape of Good Hope. Willd. 

 spec. 3. p. 1222. Flowers red. 



Depressed Indigo. Shrub prostrate. 



8 I. OVA'TA (Thunb. prod. 132. fl. cap. 596.) leaves simple, 

 ovate, villous ; stem erect, glabrous ; racemes terminal, ovate. 

 1? . G. Native of the Cape of Good Hope. Flowers red. 



Ovate-]eavcd Indigo. Shrub. 



9 I. MYSORE'NSIS (Rottl. in herb. Balb.) leaves elliptic, mu- 

 cronate, beset with adpressed strigas on both surfaces ; stems, 

 branches, and legumes clothed with simple villi ; flowers axil- 

 lary, solitary, almost sessile, disposed in a leafy raceme ; legume 



