OP ORNAMENTAL PERENNIALS. 155 
O. HUMILIS, Ser. 
A dwarf plant, with purple flowers. A native of Dahuria ; introduced in 1825. 
O. TUBEROSUS, Lin. 
A native of Britain, with changeable flowers and tuberous roots. 
O. DIVARICATUS, Lap. 
A native of the Pyrenees, with purplish spreading flowers ; introduced in 1816. 
O. PYRENAICUS, Lin. 
A native of the Pyrenees, with large rich dark purple flowers, only one or two together ; introduced in 1622, 
O. VARIUS, Sal., Bot. Mag. t. 675. 
A native of Italy; introduced in 1759. The flowers have the standard rose-coloured, and the heel and 
wings yellowish. 
O. CANESCENS, Lin. 
A beautiful species with greyish leaves, and the flowers white, tinged with blue. A native of the Pyrenees ; 
introduced in 1816. There are several varieties of this kind, which are made separate species by some authors. 
O. ALBUS, Lin., Sat. Brit. Flow. Gard. t. 22. 
There are several varieties of this species, all with white flowers. The species is a native of Hungary ; 
introduced in 1794. 
GENUS XVI. 
PLATYSTYLIS, Sweet. THE PLATYSTYLIS. 
Lin. Syst. DIADELPHIA DECANDRIA. 
Gemeric Character. — Calyx campanulate, five-cleft, the two upper I broad, spatulate, villous at the apex. Legumes oblong, many.seeded, 
lobes shortest. Corolla papilionaceous. Stamens diadelphous. Stj'le I seeds nearly globose. (G. Don.) 
Description, &c. — This genus has been separated from Orobus, on account of the breadth of its style, as 
signified in the name. 
1.— PLATYSTYLIS CYANEA, Sweet. BLUE-FLOWERED PLATYSTYLIS, 
Synonyhe. — Orobus cyaneus, Slev. 
Enghatimgs. — Swt. Brit. Flow. Gard. t. 230 ; and unr Jig, 3 in 
Plate 36. 
Specific Chikkter. — Stem simple, striated; leaves with two — three 
pair of approximate, linear lanceolate, acute leaflets ; stipules about 
equal in length to the petioles; peduncles few-flowered, longer than the 
leaves ; calycine segments lanceolate, hardly the length of the tube. 
(G. Don.) 
Description, &c. — This species has bright blue flowers when they first unfold, but they become a dark 
purple before they fade. The species is a native of Caucasus, and it was introduced in 1823. 
OTHER SPECIES OF PLATYSTYLIS. 
P. SESSILIFOLIA, Swt. 
Flowers large, and a bluish purple. Introduced from Greece, near Athens, in 1823. 
X 2 
