1578 



ROTHROCKIA 



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

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

 vol. 2, part 1, p. iO'.i. 



cordiidlia, A. Gray. Lvs, opposite, slender-petioled, 

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

 racemes; corolla - lol>es :i-+ lines long. Along water- 

 courses near the borders of Arizona. Cult, in 8. Calif. 



F. W. Barclay. 



KOUGE PLANT, ffivhiu hiimilis. 



EOtTPALA (probal)lv a native name in Guiana). Also 

 spelled Eopalu, Bhnpala. etc. Proteacmr . A genus of 

 about 40 species of the tropical regions of S. America. 

 They are mostly woody i)lanis, with handsome ever- 

 green (vs., either simple or pinnate: fls. usually incon- 

 spicuous, in axillary or lateral racemes, pedicelled in 

 pairs, hermaphrodite, regular ; perianth cylindrical, 

 rather straight, but little dilated at the base; the limb 

 somewhat globular: ovary sessile; ovules 2, pendulous, 

 orthotropous. 



A. Rairs riist-ciihirf(J. 



Pohlii, Meisn. {B. Corcnrinleiixis, Hort. ). A tree 

 with branches clothed with rusty colored woolly 

 tomentum: lvs. 1 ft. or more long, pinnate, with 

 ^-S pairs of Ifts. which are .')--.') in. long, on 

 stout petiolules 1 in. or less long, ovate or ob- 

 li(|ue]y ovate, acuminate, acutely serrate; fls. 

 J-3 in. 'long, white or yelhiwish. in nearly ses 

 sile axillary racemes :t-.") in. long. B.M. G095. 



AA. Ratrs [inhlrtt, 



aitrea. Linden. Acc<irding to Belg. 

 Hort. 180(5:202, this species was named 

 for the golden hairs covering the 

 upper parts of the stem and i>et- 

 ioles. Brazil. — Rare and imper- 

 fectly known, but still offered in 

 America. 



R. Jonghei, Hort.. is a plant offered 

 ^>y Siebrecht which doe-s ict aiipear 

 in botanical works. 



P. W. Barclay. 



EOWAN. Snrbiis Aucitpii rla. 



EOYAL CROWN. Eucomix. 



EOYAL FEEN. Oxmumh, rr- 



EOYAL PALM, 0,-,.n,U,:rf, 



'*'"'''■ 2191. To illustrate the 



EOYAL PEACOCK FLOWEE, ^T^'cJ Raspblrr°y. "= 



PmncKtiia yrijill. 



If the main cane nr 

 EOYfiNA (Adrian van Koyen, str-in on tlie left grew in 

 professor of botany ir. Univ. of l™^,'Ji|) ^^ S^ 

 Leyden; died 1(79). Ebr„ac,-,r. and id the close of the 

 Boyena lucida la one ot the old- season of 1900, the whole 

 time Cape shrubs formerly cult, cane had died or be- 

 under glass for ornament in Eng- come vei-y weak. If the 

 land and lately oifered in S. Call- cane had been examined 

 fornia. It has small white ds. "i the spring of 1900 the 

 , ^ -I / . •t.\ - '"^""i would have been 



about % m. acros.s, with ;. more ,^^^ (,^, a.bove A) from 

 or less reflexed Jobcs. R-.ycna wbifh was to erow the 

 is a igrenus of about i:i s|iMcics uf truit- bearing shoot, 

 evergreen, shrubs or small trees, 



2 of which are native to tropical Africa ami the re.st to 

 the Cape. The genus is distinguished from the 4 or 5 

 other genera of the phony family by the flowers being 

 bermaprodite instead of ditefidus and the stamens in a 

 single series. Other generic 'di/iracters (taken from the 

 Flora of Tropical Africa): '-ulyx often accrescent in 

 fruit; lobes 5, rarely 4; coi-Llia. 1m41- or urn-shaped. 

 5-cIeft; lobes reflexed; stamens 10. inserted at the base 

 of the corolla- tnlie : ovary (T)ni'-:il ; styles or style- 

 branches 2-4: fr. globose to o))lnn^-, leathery, indeliis- 

 ceut. 



liicida, Linn. Tender slirub: l\-s. ovate, the yonnKor 

 ones silky: peduncles about ;i. tliii'd as long as the lys. : 

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



RUBUS 



RUBBER PLANTS. Various plant.s furnish Rubber. 

 The best gutta pereha is said to be produced by Inondh- 

 dra Gtdta (which see), a native of India. P'or the Rub- 

 ber Tree of South America, see Rerea BrasiUcn.sis, p. 

 741. The Rubber Ti'ee of tropical Africa is Lnndolphia 

 florldii; see B.M. (IOCS. The Rubber Plant of horticul- 

 turists is Ficns ela^tica. 



RtTBIA (Latin, red; referring to the color of the dye 

 extracted from the root}. Rahuxcetp. K. tint:toru)n is 

 the dye-plant called Madder, the 

 long, fleshy roots of which are ground 

 to powder. According to Thorburn, 

 Madder furnishes a good green fod- 

 der if cut the second year when in 

 flower. The genus consists of about 

 !^^^ 30 species of scabrous, hispid or 

 1^ prickly herbs widely scattered about 

 the world, mostly in the temperate 

 regions. Lvs. in whorls of 4-8 or 

 rarelj' opposite: lvs. small to minute, 

 >^>^ i^i axillary or terminal cymes, 5-nier- 



ous ; involucre none ; calyx - limb 

 wanting ; corolla rotate or rotate- 

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

 or abortively 1-celled. 

 tlnct6rum, Linn. (i?. tinctdria, Salisb.). Madder. 

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

 sessile or very short-petioled, mostly lanceolate, not 

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

 spreading, leafy. p. w. Barclay. 



RtTBUS (Latin name, ultimately connected with 

 ■ruber, red) . Iiosace<ti. Bramble. Blackberries and 

 Raspberries. A most variable and puzzling genus, 

 containing perhaps 200 fairly well-marked species and 

 numbei'less 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 Ruborum Germa- 

 uii©," 1877; Babbington, "British Rubi," 1869; W. M. 

 Rogers, "Key to the British Rubi," Journ. Botany, 1892). 

 Focke describes 72 species inhabiting Germany. There 

 is also a large extension of the genus in the Himalayan 

 region, about 50 species being recognized (J. 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 bo 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 

 no monograph of the American species. The species 

 that are valuable for their fruits are reviewed by Card in 

 "Bush-Fruits" and by the present writer in "Sketch of 

 the FiVohition of our Native Fruits," 1898. Rubus is 

 widely distributed in the northern hemisphere, particu- 

 larly in temperate and warm-temperate parts. Softie 

 of them are alpine and arctic. In tropical countries the 

 genus is relatively poorly represented. Oliver admits 

 only 4 in the "Flora of Tropical Africa." Only 2 species 

 are described in Grisebach's "Flora of the British "West 

 Indies." Baker admits 3 species in the "Flora of Mau- 

 ritius and the Seychelles." Hillebrand describes 3 spe- 

 cies in "Flora of the Hawaiian Islands." The southern 

 hemisphere has few species. Bentham's "Flora Austra- 

 liensis" has but .5 species. Kirk's "Flora of New Zea- 

 land " mentions only 4 indigenous species. There are 

 also 5 species described in Harvey and Sonder's work 

 ("Flora Capensis ") on the flora of the Cape of Good 

 Hope region. 



Rubus is closely allied to Rosa, from wliich it differs 

 chiefly in the strnctun- of llie flower. In Rosa, the 

 turns is hollow (formerly said that the calyx is hollow 

 or urn-shaiM'd) and contains the dry fruits or akenes. 

 In Rubus tlie torus is convex, conical or elongated, and 

 bears the mostly soft or pulpy fruits on its surface. 

 Rubi liVi: chiefly shrubs with stems (canes) that die 



