154 THE LADIES' FLOWER-GARDEN 
in June and July. It should be grown in a loamy soil, and it is increased by dividing tlie roots or by seeds, 
though it ripens them but sparingly. The flowers are distinguished from those of 0. lutens, which they resemble, 
by their darker colour, and the very unequal teeth of the calyx. 
C— OROBUS ATROPURPUREUS, Desf. THE DARK PURPLE OROBUS. 
Synonymes. — 0. sieulus, Raf. ; O. Rafinesquii, Prest. I from one to several pair of linear-acuminate^ glabrous leaflets. Sti» 
ENGRAViNGS.'-Bot. Reg. t. 1763 ; and our^^. 6 in Plate 36. pules semi-sagittate, somewhat one-toothed. Peduncles longer than 
Specific Character. — Stem nearly simple ; striated. Leaves with I the leaves. Racemes dense, secund, many-flowered ; corollas elongated. 
Description, &c.^This very elegant species is remarkable for the very rich colour of its flowers and their 
singular disposition. It is a native of Algiers, Sicily, and the loamy meadows of Eastern Calabria. It flowers 
in May. It was introduced in 1826 ; and it is quite hardy in British gardens. 
OTHER SPECIES OF OROBUS. 
O. VARIEGATUS, Dec, Suit. Brit. Flow. Gard., 2d ser. t. 28. 
This species bears considerable resemblance to O. atropurpureua. 
O. FORMOSUS, Stev. 
Flowers about the size of those of O. vernus, but of a rich dark purple. A native of Caucasus ,' introduced 
in 1818. 
O. ALPESTRIS, Waldst.et Kit. 
Flowers purple ; the standard is veined with crimson, fading to blue. A native of Hungary ; introduced 
in 1817. 
O. MULTIFLORUS, Sieb. 
A native of Italy, introduced in 1820. The flowers are of a pale red. 
O. VTCIOIDES, Dec. 
Flowers yellow. A native of Camiola ; introduced in 1819. 
0. LUTEUS, Lin. 
Flowers varying from orange to pale yellow. Found in mountainous places throughout the Continent of 
Europe ; introduced in 1759. 
O. TOURNEFORTII, Lap. 
Flowers purple, with the wings and keel shaded oflf to white. A native of the Pyrenees ; introduced 
in 1820. 
O. OCHROLEUCUS, WaldsUet Kit. 
A native of Hungary, with cream-coloured flowers ; introduced in 1816. 
O. NIGER, Lin. 
A British species with purple flowers. The whole plant turns black in drying. 
O. JORDANI, Tenore 
A native of Italy, with blue flowers ; introduced in 1830. 
