272 DIADELPHIA.— DECANDRIA. Orobus. 



O. niger. Linn. Sp. PL 1 028. H. Suec. ed. 2. 25 1 . Willd. «. 3 . 

 1076. Ait. Hort. Kew. ed. 2. v. 4. 304. Hook. Scot. p. f. 267. 



O. n.418. Hall. Hist. v. 1. 182. 



O. sylvaticus, viciae foliis. Bauh. Pin. 352. 



O. foliis viciae. Riv. Tetrap. Irr. t. 60. 



O. pannonicus secundus. Clus. Hist. v. 2. 230./. Pann. 738. f. 

 append, 



Astragaloides. Dod. Pempt. 5a\ .f. Ger. Em. 1239. f. 



A. altera herbariorum. Lob. Ic. v. 2. 78./. 



In dry mountainous pastures in Scotland, rare. 



In the den of Airly, 12 miles west of Forfar, sparingly, found by 

 Mr. Thomas Drummond. Mr. W. Robertson. 



Perennial. June, July. 



Root long and tapering ; sweet, according to Linnaeus. Herb 

 smooth, turning black in drying like 0. tuberosus. Stems se- 

 veral, one and half or two feet high, upright, branched, leafy, an- 

 gular, not winged. Leaves usually of about five pair of elliptic- 

 oblong, blunt, bristle-pointed, veiny leaflets an inch long, not 

 invariably opposite ; the common stalk very little elongated 

 beyond them. Flower-stalks axillary, rather longer than the 

 leaves, each bearing a cluster, of four or five elegant, blueish- 

 purple,^otfjers, Le^wmfs blackish, cylindrical. The leciflets are 

 represented too small in all the figures above quoted, which in- 

 deed are all, except Ri.ir.us's, from the same block. 



3. O. sylvaticus. Wood Bitter- vetch. 



Stems recumbent, hairy, branched. Leaflets numei'ous. 



O. sylvaticus. Linn. Sp. PL 1029. Willd.v. 3. 1076. Ft. Br. 762. 



EngLBot.v.'S.t.blS. Light/. 390. t.\ 6. Hook.Scot.2l3. Land. 



t. 8. Dicks. H. Sicc.fasc. 1.12. 

 O. sylvaticus nostras. Raii Syn. 324. 

 Vicia cassubiea. FL Dan. t. 98 ; but not of Linnceus. 

 j3, with simple leaves. Sm, Tour to Hafod. 16. 



In mountainous woods and thickets. 



At Gamblesby, Cumberland, about 6 miles from Penrith inaqj 

 way to Newcastle, plentifully. Ray. In several parts of Wales, 

 and the lowlands of Scotland. Also in Ireland, according to 

 Dr. Wade. 



Perennial. May, June. 



Root creeping, woody, tough, deeply fixed in the ground. Stems 

 numerous, spreading or recumbent, 1 to 2 feet long, somewhat 

 branched, leafy, angular, more or less hairy, but in this respect 

 the whole plant varies greatly. Leaves of numerous pairs of 

 ovate-lanceolate, acute leciflets, whose common footstalk is 

 somewhat elongated, but not so as to form a tendril. Stipulas 

 half-arrow-shaped, single-toothed. Clusters of numerous Jlowers, 

 about as long as the leaves. Cal. more hairy than the stalks. 



