1538 



ROBINIA 



ROCHEA 



beauty of R. Pseudacacia was early recognized and it 

 was extensively planted, but the attacks of the borer 

 have caused great loss and checked the planting of a 

 beautiful tree. 



2134. Rivina humilis {X /^). (See page 1537.) 



Pseudacacia, Linn. Locust. False Acacia. Black 

 Locust. Fig. 2135. This species is the largest of the 

 genus, growing to a height of 80 ft. Lfts. short-stalked. 

 9-19, 1-2 in. long, oval or ovate, smooth, often emargi- 

 nate or mucronate: bark on young wood brown and 

 glandular; stipules glandular, enlarging with age and 

 becoming strong thorns on the 2-year-old wood : fls. 

 white and fragrant, in drooping racemes: fr. a broad, 

 brown, many-seeded pod or legume. May, June. East- 

 •ern N. A. — Wood very lasting, and adapted to many uses. 

 Many varieties of this species are in cultivation, the 

 following being sold in this country: atirea, Hort., has 

 pale yellow Ivs. ; bella-rdsea, Hort., rose-colored fls., 

 and is probably a hybrid of R. Pseudacacia and R. vis- 

 cosa; var. inlrmis, DC, is a thornless variety, with 

 large dark foliage; buU^ta, Hort., is much like Bessoni- 

 ana (below), but more compact; Decaisne^na, Carr., is a 

 form with handsome rose-tinted fls. R.H. 1863:151. F.S. 

 19:2027. I.H. 12:427. Gn. 34, p. 174; spectdbilis, Du 

 Mont Cour., is a strong-growing thornless var.; mono- 

 ph^Ua, Pelz. & Kirchn., is the Single-leaf Locust, and of 

 this there is a slightly pendulous sub-var, ; p^ndula, 

 Loud., is a form with broad, spreading, somewhat 

 drooping branches ; semperfldrens, Hort., is said to 

 flower throughout the summer; vars. gl6bula, stricta 

 and mimosseidlia are horticultural forms, which are suf- 

 ficiently described by their names; pyramid^Iis, Petz. 

 & Kirchn., is a distinct narrow-growing form; umbra- 

 cuUfera, DC. Umbrella Locust. Thornless, the gla- 

 brous branches densely crowded : lfts. ovate. Vars. 

 rubra, stricta and Besaoniana are forms of this. Very 

 •distinct. 



hispida, Linn. Rose Acacia. Fig. 2130. A shrub 2- 

 8 ft. high, all parts of the plant except the fls. bristly 

 or hairy: lfts. 9-13: racemes loose: fls. on long pedi- 

 cels, rose color. May, June. Va. to Ga., in mountains. 

 B.M. 311. Gn. 34, p. 175. — Like the next species, it 

 spreads from the root and should be planted where it will 

 not interfere with other plants. Seldom matures seed. 



viscdsa, Vent. Clammy Locust. A small tree, rarely 

 growing to the height of 30-40 ft. : shoots, petioles 

 and seed -pods covered with viscid -glandular hairs: 

 lfts. 11-25: fls. in a short and usually rather erect ra- 

 ceme, rose color. June. Va. to Ga., in mountains. S.S. 

 3:115. B.M. 560.-The var. bella-rdsea.Nich., is /e.PsencZ- 

 acacia, var. bella-rosen. 



Neo-Mexicilna, Gray. A shrub 5 or G ft. high, with 

 stout stipular prickles : peduncle, raceme and calyx 

 glandular-hairy: fls. in drooping axillary racemes, rose 

 color. Southwestern N. Amer. S.S. 3:114. Gt. 41:1385. 



li. Kelsei/l is "a new species discovered and introduced in 

 1901, by Harlan P. Kelsey. The bark much resembles K. Pseud- 

 acacia and the plant is sparintjly pubescent." It is A'. Hoyn- 

 toni, Ashe. j„„j^ p_ COWELL. 



ROBIN'S PLANTAIN, Erigeron bellidifoUus. 



BOCAMBOLE {Alli^im Scorodoprasuni, Linn.), is a 

 humble member of the onion tribe, the underground 

 bulbs of which are used abroad like garlic, known in 

 America amongst the Canadian French. The plant is a 

 hardy perennial, with a stem that is twisted spirally above 

 and bears at the top an umbel of flowers, some or all of 

 which are changed to bulblets. The presence of these 

 bulblets distinguishes the plant from garlic. The spe- 

 cies can be propagated by the bulblets, but quicker re- 

 sults are secured from the cloves of the underground 

 bulbs. In mild climates, the bulbs should be planted in 

 autumn or not later than February ; in cold climates, 

 plant in spring. In the autumn when the leaves decay, 

 the bulbs are lifted, dried in the sun, and stored. 



Rocambole is a native of Europe, the Caucasus region 

 and Syria. It has flat or keeled leaves, short spathe, 

 bell-shaped, 6-parted perianth, and the 3 inner stamens 

 broader than the rest, 3-cleft, and not longer than the 

 perianth. It is a perennial plant. Good seeds are 

 rarely produced. 



ROCCARDIA. Consult Helipterum. 



ROCHEA (de la Roche, French botanist). Crassu- 

 Idcew. A genus of 4 species of succulent plants from 

 S. Africa, with opposite, oblong-ovate or lanceolate Ivs. 

 and fls. in terminal, few-to many-fld. heads. For generic 

 characters, see Crassula. The best species is R. coc- 

 cinea. The following points concerning its culture are 

 condensed from Gn. 40, p. 300: This species enjoys an 

 abundance of light and sun-heat, and needs to have its 

 wood thoroughly ripened in the autumn to insure a dis- 

 play of bloom. If small plants can be procured they 

 should be nipped about February 1. If a few leaves are 

 removed, after the top is pinched out, shoots will start 

 more evenly. After pinching, the plants are put into 

 considerably larger pots, a peaty soil being generally 

 used and good drainage given. They should be given a 

 night temperature of 50°, day temperature of 75-80° 

 in sunshine, with plenty of atmospheric moisture until 

 the new growths are freely produced, when they should 



2135. Robinia Pseudacacia {X%). 



be inured to more air. A shading of the glass may be 

 necessary in siuiinifr, or the plants may be ])Iaced in a 

 sheltered ])ositi(in outside. About August, wlieu the 

 plants have nuide as much growth as can be ripened 

 that season, they may be placed in a warm, dry, sunny 



