LEGUMINOS^E. 



471 



Smoothish Bastard-vetch. PL 1 foot. 



31 PHA'CA E'LEGANS (Hook, fl. bor. amer. p. 144.) plant 

 nearly glabrous ; steins branched, erect, or assurgent, angular ; 

 leaves with 5-7 pairs of oblong, obtuse leaflets, which are cu- 

 noated at the base, glabrous above, but clothed with minute 

 adpressed pili beneath ; stipulas ovate, acute, rather connate at 

 the base ; racemes compact, on long peduncles, exceeding the 

 leaves, but when in fruit much more elongated ; legumes sessile, 

 elliptic, inflated, membranous, apiculated, clothed with black 

 velvety down, 3-5-seeded. If. . H. Native of North America, 

 in the prairies of the Rocky Mountains. There is a smaller 

 ascending variety with shorter racemes, which inhabits the sum- 

 mits of the higher mountains. Leaves glaucous beneath. 

 Flowers of a bright and deep purple. This species should follow 

 P. Lapponica, p. 248. no. 14. of the present volume. 



Elegant Bastard-vetch. PL 1 foot. 



32 PHA'CA BISULCA'TA (Hook, fl. bor. amer. p. 145.) stems 

 rather decumbent, smoothish ; leaves nearly sessile, with 11-13 

 pairs of elliptic leaflets, which are clothed with adpressed hairs 

 beneath ; stipulas ovate, acute, free ; racemes pedunculate, very 

 much elongated ; flowers nodding ; legumes pendulous, stipitate, 

 linear-cylindrical, bisulcate, clothed with adpressed pubescence. 

 If. . H. Native of North America, on the plains of the Saskat- 

 chawan. Flowers of a rich purple colour. This species should 

 follow P. brachijtropis, Stev. p. 248. no. 16. of the present 

 volume. 



.Bz'su/ca/e-podded Bastard-vetch. PL 1 to 2 feet. 



1 . Acaules, p. 249. 



33 OXY'TROPIS FOLIOLO'SA (Hook, fl. bor. amer. p. 146.) 

 stemless, and clothed with hoary villi ; leaves numerous ; leaflets 

 approximate, ovate or ovate-oblong, acutish ; scapes pilose, 

 longer than the leaves ; heads of flowers broadly ovate, small ; 

 flowers crowded, spreading, lower ones reflexed ; bracteas linear- 

 subulate, shorter than the calyx, which is beset with black hairs ; 

 legumes remotish, deflexed, cylindrical, acute, beset with black 

 hairs. H.. H. Native of North America, from Carlton House 

 to the Rocky Mountains. Petals bluish purple, their bases 

 nearly white. This species is most nearly allied to 0. montana, 

 D. C. p. 249. no. 1. of the present volume. 



Leafy Mountain Milk-vetch. PL i foot. 

 31 OXY'TROPIS ARGYROMIY'LLA (Led. fl. ross. all. ill. t. 54.) 

 is O. argyrae'a, D. C. p. 249. no. 4. of the present volume. 

 Silver-leaved Mountain Milk-vetch. 



35 OXY'TROPIS SULPIIU'RKA (Led. fl. ross. all. ill. t. 55. fl. 

 atl. 3. p. 285.) nearly stemless ; leaflets numerous, lanceolate, 

 when young silky ; petioles and scapes beset with spreading 

 pili ; scapes a little longer than the leaves ; flowers horizontal, 

 in dense spikes ; bracteas lanceolate-linear, about equal in length 

 to the villous calyx ; legumes erectly spreading, ovate-oblong, 

 somewhat 2-celled, acuminated. T(. . H. Native of Altaia, 

 near Riddersk. Corolla sulphur-coloured. To follow 0. ca- 

 pestris, D. C. p. 251. no. 26. of the present volume. 



Sulplmr-coloured-fiowered Mountain Milk-vetch. PL i foot. 



36 OXY'TROPUS BREVICAU'LIS (Ledeb. fl. ross. alt. ill. t. 288. 

 fl. alt. 3. p. 284.) plant caulescent, erect, rather silky ; stem 

 short ; leaflets crowded ; stipulas adnate to the petioles, lanceo- 

 late, acuminated, ciliated ; leaflets ovate-oblong ; peduncles 

 twice the length of the leaves ; racemes at length elongated ; 

 bracteas about half the length of the calyx ; legumes cylindrical, 

 erect, pubescent, 1-celled. If.. H. Native of Altaia, in the 

 Soongarian desert, between mount Ku and Karkarala. Corolla 

 violaceous. Plant tufted. To follow O. Songarica, D. C. 

 p. 250. no. 17. of the present volume. 



Short- stemmed Mountain Milk-vetch. Fl. Ju. Aug. PL \ ft. 



2. Verticillares, p. 251. 



37 OXY'TROPIS PHYSOCA'RPA (Led. fl. ross. alt. ill. t. 381. 

 fl. alt. 3. p. 272.) stem shrubby, branched ; leaves impari- 

 pinnate ; leaflets verticillate in fours, oblong or linear, minute, 

 with ciliated margins, and bearded towards the apex ; petioles 

 usually permanent ; peduncles axillary, usually 3-flowered, rather 

 shorter than the leaves, but at length elongated ; calyx rather 

 villous ; legumes inflated, muricate, ending in a curved beak. 

 Jj . H. Native of Altaia, on the tops of the alps at the river 

 Tschuja. Corolla violaceous. To follow 0. muricata, p. 252. 

 no. 41. of the present volume. 



Bladder-fruited Mountain Milk-vetch. Fl. June. Sh. dense. 



38 OXY TROPIS SUBVERTICILLA'TA (Led. fl. ross. alt. ill. 

 t. 292. fl. alt. 3. p. 275.) stem shrubby, branched, very short ; 

 leaves impari-pinnate ; leaflets somewhat verticillate by pairs 

 of fours, elliptic, silky on both surfaces ; petioles hardened, per- 

 manent ; peduncles axillary, 3-flowered, shorter than the calyx, 

 which is beset with spreading villi ; legumes pubescent. Jj . H. 

 Native of Altaia, in the Soongarian desert, between the moun- 

 tains Kent and Ku. Corolla violaceous. To follow 0. muri- 

 cata, D. C. p. 252. no. 41. of the present volume. 



Subvcrticillate-leaveA Mountain Milk-vetch. Fl. July, Sept. 

 Shrub dwarf. 



^ 3. Tragacantholdece, p. 252. 



39 OXY'TROPIS POLYPHY'LLA (Led. fl. ross. alt. ill. t. 277.) 

 stem shrubby, much branched, short ; leaves impari-pin- 

 nate ; leaflets 11-17, ovate-oblong, silky on both surfaces; 

 petioles hardened, permanent ; spikes of flowers sub-capitate, 

 axillary ; peduncles elongated, about equal in length to the 

 leaves ; calyx clothed with white villi. T? . H. Native of 

 Altaia, on mountains near the river Tschuja. Corolla viola- 

 ceous. To follow 0. tragacanthoMes, Fisch. p. 252. no. 42. of 

 the present volume. 



Many-lettfletted Mountain Milk-vetch. Fl. May, Ju. Sh.ift. 



40 OXY'TROPIS LEUCOPODIA (Led. fl. ross. alt. ill. t. 282. 

 fl. alt. 3. p. 279-) stem shrubby, much branched, short ; leaves 

 impari-pinnate; leaflets usually 13, oblong-linear, glabrous; 

 petioles hardened, permanent ; peduncles axillary, 2-flowered, 

 very short ; calyx covered with thick, elevated corpuscles ; le- 

 gumes rather inflated, glabrous, ending in an acuminated beak. 



Jj . H. Native of Altaia, on mountains near the river Tschuja. 

 Vexillum and wings yellow. Keel bluish. To follow 0. tra- 

 gacanthoides, Fisch. p. 252. no. 42. of the present volume. 



While-petioled Mountain Milk-vetch. Fl. Ju. Sh. 6 inches. 



41 OXY'TROPUS ACIPHY'LLA (Led. fl. ross. alt. ill. t. 281. fl. 

 alt. 3. p. 279.) stem shrubby, much branched ; leaves abruptly 

 pinnate, with 2 or 3 pairs of oblong or oblong-linear, pungent 

 leaflets, which are silky on both surfaces ; petioles permanent, 

 hardened into spines; peduncles axillary, 2-3-flowered, twice 

 the length of the villous calyx; legumes oblong, acuminated, 

 villous. fj . H. Native of Altaia, on sandy hills at the river 

 Irtysch. Corolla purplish violet. Shrub forming a dense tuft. 

 To follow O. tragacantholdes, Fisch. p. 252. no. 42. of the pre- 

 sent volume. 



Needle-leafletted Mountain Milk-vetch. PL May. Sh. tufted. 



4. Caulescentes. 



42 OXY'TROPIS DIFFU'SA (Led. fl. ross. alt. ill. t. 451. fl. alt. 

 3. p. 281.) many stemmed, diffuse, beset with adpressed pili; 

 stipulas opposite the leaves, somewhat concrete, ciliated ; leaflets 

 ovate-oblong ; peduncles at length nearly twice the length of 

 the leaves ; flowers racemose ; bracteas rather exceeding the 

 pedicels ; legumes depressed, mucronate, deflexed, 1-celled. 



