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988 



order Papilionacece and tribe Podalynea>, 

 consisting of two low herbs or undershrubs 

 from Swan River, with ascending simple 

 almost rush-like stems, and alternate nar- 

 row simple leaves. The flowers are yellow, 

 in a loose terminal raceme, of no beauty. 

 They are distinguished from the allied 

 genera, which like them have two ovules 

 only to the ovary, chiefly by the small 

 globular pod, borne on a distinct stalk. 



ROEBUCK-BERRY, The fruit of Bubus 

 saxatilis. 



ROEGNERIA. A genus of grasses be- 

 longing to the tribe Festucece. The spikelets 

 are distant, few-flowered ; the outer glumes 

 three-nerved, the superior five-nerved ; 

 flowering glume subcom pressed, length- 

 ened out into a long awn-shaped apex, olo- 

 soletely three-nerved, the margin hairy. 

 This genus contains only one species, 

 R. caucasica, which inhabits woods in 

 Daghestan. [D. M.] 



ROELLA. The name of a genus of 

 Cam panulacew, whose chief character is 

 derived from the capsule, which is elon- 

 gated and two-celled, opening by a hole at 

 the apex. The species are chiefly under- 

 shrubs, rarely herbaceous plants, having 

 alternate narrow and usually rigid leaves. 

 They are natives of the Cape of Good 

 Hope. The genus was named in honour of 

 Roell, an Amsterdam professor. [G. D.] 



RCESTELIA. A curious genus of parasitic 

 Fungi with an elongated peridium, the 

 component cells of which at length sepa- 

 rate from each other so as to form ragged 

 lacinias. In R. cornuta and lacerata, which 

 grow on the mountain-ash and hawthorn, 

 these are separate at the apex so as to ex- 

 pose completely the mass of spores joined 

 to each other like the beads of a necklace ; 

 but in B. cancellata they remain attached 

 above, so as merely to leave a passage for 

 the spores between their interstices. All 

 of them produce at the same time, gene- 

 rally on the opposite side of the leaf, 

 little cysts or pycnidia, which are filled 

 with minute naked spores. Some imagine 

 these bodies to have sexual functions. B. 

 cancellata, which is the pest of pear-trees, 

 produces curious rugged swellings on the 

 leaves, through each elevation of which 

 a peridium bursts out. The only method 

 of mitigating the evil is to handpick every 

 leaf as soon as it shows any sign of the 

 swellings and burn it. It may be too late 

 if the peridia have made their appearance 

 and dispersed their spores. [M. J. B.] 



ROGATION-FLOWER. Poly gala vul- 

 garis. 



ROGERIA. A small genus of Pedaliacea, 

 having the habit of Pedalium, and con- 

 sisting of annual herbs found in tropical 

 Africa and Brazil. The calyx is five-cleft ; 

 the corolla tubular and funnel-shaped ; 

 the stamens are four in number, and do 

 not project beyond the border of the co- 

 rolla; the fruit is almost nut-like, opens 

 towards the point, has from four to eight 

 spines, and appears to be from four to six- 



celled, the cells having eitheran indefinite 

 number or only solitary seeds. Their uses 

 are unknown. [B. S.] 



ROGIERA. A genus of Cinchonacece 

 named in compliment to M. C. Rogier, late 

 Minister of the Interior for Belgium, and 

 an active patron of horticulture. Thev 

 are shrubs somewhat resembling the 

 laurestine ; but the eaves are covered 

 with soft hairs, while the salver-shaped 

 corollas are rose-coloured, and closed at 

 the throats by a tuft of golden hairs. The 

 genus differs from Bondeletia in the ab- 

 sence of the thick ring in the corolla- 

 throat. [M. T. MJ 



ROHFNA. An Indian name for Soymida 

 febrifuga. 



ROI DES ARBRES. (Fr.) Quercus 

 Bobur. 



ROLLANDIA. This name has been 

 given to two shrubby milky-juiced Sand- 

 wich Island plants belonging to the Lobe- 

 liacece, which are described as differing 

 generically from Delissea in the staminal 

 tube being adnate to the tube of the co- 

 rolla on one side, instead of free from it. 

 This is supposed to be an error by Dr. Asa 

 Gray, who unites the genus with Delissea: 

 which see. [A. A. B.j 



ROLLINIA. An almost exclusively 

 Brazilian genus of Anonacew, composed of 

 about twenty species of shrubs or small 

 trees, closely allied to Anona, from which, 

 however, they are distinguished by their 

 flowers having the petals cohering and 

 forming an almost globose corolla, which 

 is open and shortly six-lobed at the top, 

 and is drawn out at the back into three 

 very blunt concave wings. They have al- 

 ternate entire short-stalked leaves, from 

 near the axils of which solitary or 

 rarely several flowers are produced, and 

 are succeeded by scaly fruits formed of a 

 number of one-seeded carpels cohering 

 together. , 



The arboreous species, such as B. mvlliflo- 

 ra, B. longifolia, and others, afford a light 

 tough wood resembling lancewood ; that 

 of the first-mentioned being used by the 

 natives of Guiana and Brazil for making 

 spears. They seldom grow above twenty- 

 five or thirty feet high. [A. S.] 



ROMATNE. (Fr.) The Cos Lettuce. 



ROMANZOVI A. A genus of Hydrophylla- 

 cece, consisting of low many-stemmed 'pi- 

 lose herbs, with cordate radical leaves on 

 longpetioles.smallalternate cauline leaves, 

 and terminal one-sided racemes. The ca- 

 lyx and corolla are five-parted; the five 

 stamens are included in the tube of the 

 corolla ; and the style, unlike the other 

 members of the order, is simple and fur- 

 nished with a capitate stigma. They are 

 natives of Arctic America. [W. C.j 



ROMARIN. (Fr.) Bosmarinus. — , 

 SALVAGE. Ledum palustre. 



ROMERIA. A genus of Papaveracecr, 

 named in honour of J. Romer, a botanist, 



