1578 



ROTHBOCKIA 



5-parted ; stigma abruptly produced from the top into a 

 column having a 3-crested apex. Syn. Flora N. Araer., 

 vol. 2, part 1, p. 403. 



cordifdlia, A. Gray. Lvg. opposite, slender-petioled, 

 cordate, acutely acuminate: fls. white or whitish, in 

 racemes; corolla -lobes 3-4 lines long. Along water- 

 courses near the borders of Arizona. Cult, in S. Calif. 

 F. W. Barclay. 



B0U6E PLANT. Bivina Immilis. 



BOtrPALA (probably a native name in Guiana). Also 

 spelled -Ropa?rt, -Bftopnift, etc. ProteAcete. Ag 

 about 40 specie.=! of the tropical regions of S. A 

 They are mn-^tly wooily i>l:i!its, ivitli h:,ii.l-'.nv 

 green Ivs.. i-itli.T ^ini|.| ■ ihiiikm,' i1- t,-ii;illv 



SpicUOUS, in ;iXlll;if\- or l;ihl;il i ;m- , ': 



pairs, hi-nii:i|'lirci(lllc', l-r^iiilnv ; |.. I : ' : 



rather straight, iHit little (liL-iti-cl :it tli.l.:i-r: il 

 somewhat globular; ovary sessile; ovules 2. pi-ii 

 orthotropous. 



A. Hairs rust-colored. 



Pdhlii, Meisn. {E. Corcovadfnsis, Hort.). A tree, 

 with branches clothed with rusty colored woolly 

 tomeutum: Ivs. 1 ft. or more long, pinnate, witl 

 5-8 pairs of Itts. which are 3-5 in. long, on 

 stout petiolules 1 in. or less long, ovate or ol 

 liquely ovate, acuminate, acutely serrate: fls, 

 K in. long, white or yellowish, in nearly ses- 

 sile axillary racemes 3-5 in. long. B.M. 6095. 

 AA. Hairs golden. 



aiirea, Linden. According to Belg 

 Hort. 1866:202, this species was named 

 for the golden hairs covering the 

 upper parts of the stem and pet- • 

 ioles. Brazil. — Rare and imper- ^^ M V^ 

 fectly known, but still offered in ^iLaf \ 



America. 



It. Mnghei, Hort., is a plant offered 

 by Siebrecht which does not appear 

 in botanical works. 



F. W. Barclay. 



RUBUS 



RUBBEK PLANTS. Various plants furnish Rubber. 

 The best gutta percha is said to be produced by Isonau- 

 dra Gutta (which see), a native of India. For the Rub- 

 ber Tree of Soxith America, see Hevea Brasiliensis, p. 

 741. The Rubber Tree of tropical Africa is Landolphia 

 florida; see B.M. 6963. The Rubber Plant of horticul- 

 turists is Ficu.i elastica. 



RDBIA (Latin, red: referring to the color of the dye 

 extracted from the root). Biibi&ceii'. Ji. tinctontm is 

 the dye-plant called Madder, the 

 long, Heshy roots of which are ground 

 to jiowcler. According to Thorburn, 

 JIadder furnishes a good green fod- 

 der if cut the second y<-iir when in 



arely opposite: Ivs. small to minute, 

 u axillary or terminal cymes, 5-mer- 

 nvolucre none ; calyx - limb 

 wanting ; corolla rotate or rotate- 

 bell-shaped, 5-lobed: ovary 2-loculed 

 or abortively 1-celled. 

 tinctdrum, Linn. (B. tinctbria, SalLsb.). Madder. 

 A scandent herbaceous perennial: Ivs. 2-4 in. long, 

 hort-petioled, mostly lanceolate, not 

 cordate, in whorls of 4-6: cymes terminal, panicled, 

 spreading, leafy. p. w. Barclay. 



ROWAN. 



Aucupar 



ROYAL CROWN. Encomis. 



ROYAL FERN. Osmunda r 

 galis. 



ROYAL PEACOCK FLOWER. 



2191. 

 black Raspberry, 



RtTEUS (Latin name, ultimately connected with 

 ruber, veA). Bosdcew. Bramble. Blackberries and 

 Raspberries. A most variable and puzzling genus, 

 ning perhaps 200 fairly well-marked .species and 

 numberless intermediate forms. As many as 1,500 spe- 

 cies have been described. The genus is particularly 

 strong in Europe, where the greatest number of specific 

 names have been made (see Weihe & Nees, "Rubi 

 Germanici." 1822-7; Focke, "Synopsis Hnbnrum Germa- 

 TiilP," 1877; Babliington, "Hritisli Hiil.i," l,si;9; W. M. 

 Rogers, "Key to the British Kulii.'MMurii. I'.olanv, 1892). 

 l''„cke describes 72 species iiiljal.iliiig i hiiikiiiv. There 

 trge extension of the genus in the Himalayan 

 region, about 50 species being recognized (.1. D. Hooker 

 admits 41 species in the "Flora of British India"). The 

 species extend eastward into China and Japan. Hemsley, 

 in his "Flora of China," admits 41 species. In Japan, 

 Franchet and Savatier admit 22 species. In North 

 America, about 40 species are now recognized, but they 

 have not been studied critically, and it is probable that 

 many more specific types will be recognized in the near 

 future. No end of 'species could be made, but it is 

 doubtful whether a great multiplication of species- 

 names would contribute anything more than confusion 

 to the literature and knowledge of the genus. There is 



fornia. 1 ' , i 



or less r^'il. .\< ■:;•-• ': 



is a genus of ali-n: ; : 



evergreen shruli^ 



2 of which are ii:ii i - i ■ 



the Cape. The -rim- i- ,1 

 other genera of the ebony 

 hermaprodite instead of di 

 single series. Other generi 

 Flora of Tropical Africai: 



fruit; lobes 5, rarely 4; eoi-ulhi l>ell- or urn-shaped, 

 5-cleft; lobes reflexed; stamens 10, inserted at the base 

 of the corolla -tube: ovary conical; styles or style- 

 branches 2-4: fr. globose to oblong, leathery, indehis- 



Idcida, Linn. Tender shrub: Ivs. ovate, the younger 

 ones silky: peduncles about a third as long as the Ivs.: 

 corolla bell-shaped. S.Africa. B.R. 32:40. 



Ho].e r.-gion. 



Rubus is closely allied to Rosa, from which it differs 

 chiefly in the structure of the flower. In Rosa, the 

 torus is hollow (formerly said that the calyx is hollow 

 or urn-shiiped) and contains the dry fruits or akenes. 

 In Rubus the toi-ns is eoinex. conical or elongated, and 

 bears the mostly soft or imlpy fruits on its surface. 

 Rubi are cliieily slirnl.s with "stems (canes) that die 



