836 DIADELPHIA. DECANDRIA. Orobus. 
O'ROBUS.* Calyx, the two upper teeth shorter but more 
deeply divided: Style slender: Summit pubescent 
above. 
O. sylvat'icus. Stems decumbent, hairy, branched: leafits seven to 
twelve pair. 
Dicks. H. S. — {Hook. FI. Lond. — E. Bot. 518. E.) — Lightf. 16. p. 390. 
Stems numerous, one to two feet long, trailing, much branched, slightly 
hairy. Leaves winged, alternate; leafits oval, or elliptical, terminated 
by a pointed extension of the mid-rib ; on short hairy leaf-stalks, some¬ 
what alternate, six to twelve pair, without an odd one, but with a sort 
of beard at the end of the general leaf-stalk. Flowers numerous, on short 
pedicles, crowded, mostly pointing one way, on the top of a long naked 
fruit-stalk. Stipules half-harrow-shaped, two at the base of each general 
leaf-stalk, smaller than those of O. tuberosus , and ending in a more acute 
point. Calyx short, green, tinged with red, fringed, lips nearly equal, 
the upper with two teeth, the lower with three, rather longer. Blossom 
long and narrow, reddish white, veined with purple, compressed. Woodw. 
{Root rather woody. Legume nearly an inch long, smooth. E.) 
(Sir J. E. Smith reports an extraordinary variety to have been found at 
Hafod, in South Wales, by Mr. Todd, with simple leaves, five times as 
large as its natural leafits, and which cannot by any culture be made to 
flower. E.) 
Wood Bitter-Vetch. Wood Peasling. Woods, hedges, pastures, 
dry rocky places, and banks of rivers. (Lowlands of Scotland. North 
side of Braid Hill, near Edinburgh. Mr. Brown. Fringing the rocks 
along the banks of the Clyde, near the beautiful cascade of Corra Lyn. 
Dr. Hooker. E.) Ten miles from Penrith; Gamblesby, Cumberland. 
Mr. Woodward. Below Brecknock Hills, in the way to Cardiff, and not 
far from Bala, Merionethshire. Upper part of Merley Wood, near Ox¬ 
ford. Near Ross-Trevor, Ireland. Ray. Woods about Airly Castle. 
Mr. Don. On the Tweed, about half a mile below the Buld. Dr. Hope. 
About Cerrig y Druidion, and Ys pytty, Denbighshire. Mr. Griffith. 
P. May—July. 
(O. nigger. Leaves winged, of from four to six pair of elliptic-lan¬ 
ceolate leaflets: stipulse linear-awl-shaped, simple, entire: stem 
branched, angular, erect. 
jRiv. Tetrap. Irr. t. 60 — Clus. Hist. v. 2. 230 — Dod. Pempt. 551 — Ger. Em. 
1239 — Lob. Ic. v. 2. 78. 
Root tapering, sweet according to Linnaeus. Herb smooth. Stems several, 
one and a half to two feet high, upright, branched, leafy, angular, 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, flowers. Legumes blackish, cylindrical. 
Black Bitter-Vetch. O. niger. Linn. Found by Mr. Thomas Drum¬ 
mond, in the den of Airley, ten miles west of Forfar, sparingly. 
P. June—July. Hook. Scot. Sm. Eng. FI. E.) 
* (From o pw, to excite; and /3an ox; the plant refreshing and nourishing 
cattle. E.) 
