350 



PB ACTIO AL GUIDE TO GABDEN PLANTS 



OEOBUS 



requires very hot and dry situations, but 

 likes plenty of water during growth. It 

 is rather too tender for any except the 

 mildest parts of the kingdom out of doors, 

 but makes a charming and brilliant 

 climber for cold greenhouses. 



L. tingitanus (Tangier Pea). — A 

 pretty Tangierian annual, with winged 

 stems, ovate, blunt, sharply pointed leaf- 

 lets, and ovate, semi-sagittate stipules. 

 Flowers in summer, with a large purple 

 standard, and bright red wings and keel. 



Culture dc: as above. 



L. tuberosus. — This native of Em-ope, 

 Asia, and N. Africa is now naturalised in 

 some parts of England, and is also grown 

 in Holland for its edible, tuberous roots. 

 The stems are 4-angled, and the leaves 

 have one pair of oblong, elliptic leaflets, 

 and narrow, acute, semi-sagittate stipules. 

 Flowers in summer, large, rosy, 3-6 on a 

 stalk, very free. 



Culture do. as above. As the roots of 

 this species travel a good deal under 

 ground, plants should be placed where 

 they will not interfere with choicer 

 subjects. 



L. violaceus. — A rather pretty Califor- 

 nian perennial 6-8 ft. high, with pale green 

 leaves composed of 10-12 leaflets, and 

 racemes of violet-blue flowers produced in 

 summer. 



Culture dx: as above. Eequires pro- 

 tection in northern parts in winter. 



OROBUS (Bitter Vetch). — Ben- 

 tham and Hooker consider this to be 

 merely a botanical section of Lathyrus. 

 For garden purposes, however, it is quite 

 distinct, and is best kept separate from 

 the Sweet and Everlasting Peas. It 

 differs from Lathyrus chiefly in having 

 no tendril at the tip of the leaf-stalk, 

 and in the plants as a rule being dwarf, 

 tufted, and non-climbing in habit. 



Culture and Propagation. — They 

 thrive in any good garden soil, and are 

 easily increased by dividing the root- 

 stocks in spring, or by sowing seeds at 

 the same period. They are suitable for 

 rougher parts of the rockery, margins of 

 shrubberies, borders &c. 



O. atropurpureus. — An elegant Alge- 

 rian perennial 1-li ft. high, with leaves 

 composed of 2-3 pairs of sharp linear 

 leaflets and small semi-sagittate stipules. 

 The deep rose or violet-purple flowers 

 appear in May and June in loose racemes. 



Culture dc. as above. Incold northern 

 parts this species requires protection in 

 winter with dry leaves &c. 



O. aurantius. — A Caucasian perennial 

 li~J, ft. high, with .5-6 pairs of lance- 

 shaped, bluntish leaflets, and deep yellow 

 flowers in early summer. 



C'tilture dc. as above. 



O. cyaneus (Platystylis cyaneiia). — 

 A pretty Caucasian species 6-12 in. high. 

 Leaves with 2-3 pairs of closely set, 

 narrow, lance-shaped, acute leaflets. 

 Flowers in spring, blue at first, changing 

 to purple, large, handsome, few on a stalk. 



Culture dc. as above. 



O. filiformis (0. canescens). — A native 

 of S. Europe, with 4-angled stems, and 

 leaves with 2-3 pairs of linear, bluntish, 

 downy or dotted leaflets. Flowers in 

 May, white, tinged with blue, many on a 

 stalk. 



Culture dc. as above. 



O. flaccidus. — A native of Croatia, 

 6 ft. high. Leaves with 2-3 pairs of long, 

 smooth, opposite, linear leaflets, dark 

 green above, pale beneath ; stipules large, 

 semi-sagittate. Flowers hi May, purple, 

 with 2 prominent blunt teeth near the 

 middle of the standard petal. 



This is closely related to 0. vernus, 

 and is regarded as a botanical form of it. 



Culture dc. as above. 



O. hirsutus. — A native of Tlu-ace, 1 ft. 

 high. Leaflets ovate, acute, paraUel- 

 nerved. Flowers-in May, red. 



(Culture dc. as above. 



O. lathyroides (Vicia oroboides). — 

 A pretty Siberian species, 1-11 ft. high. 

 Leaves composed of 2 leaflets 2 in. long, 

 1 in. broad, oval, lance-shaped acute ; 

 stipules semi-sagittate, toothed at the 

 base. Flowers in early smnmer, blue, 

 small, numerous. 



Culture dc. as above. 



O. luteus. — A handsome Siberian 

 species 1-2 ft. high. Leaves witli 3-5 

 pairs of elliptic lance-shaped, pointed leaf- 

 lets, glaucous beneath. Flowers in June, 

 yellow, many on a staUc. 



Culture dc. as above. 



O. niger. — A pretty European species 

 11-3 ft. liigh, with flexuous stems, and 

 glaucous green leaves composed of about 

 8 pairs of small oval-oblong leaflets. In 

 June and July about 8-12 handsome 



