RUBIACEAE 573 



Rouge, Carthamus tinctorius L. 



Rouhamon Aubl.s=Strychnos L. (Logan.)- 



Roulinia Decne. Asclepiadaceae (n. i). 15 Texas to Argentina. 



Rouliniella Vail. (Roulinia p.p.). Asclepiadaceae (n. i). 7 C- Am. 



Roupala Auhl. Proteaceae (n). 40 trop. Am., Austr., New Caled. 



Roupellia Wall, et Hook. (Strophanthus p.p. EP.). Apocynaceae 

 (n. i). i W. Afr. 



Rourea Aubl. Connaraceae. 40 trop. 



Roureopsis Planch. Connaraceae. 2 Malaya. 



Roussea Smith. Saxifragaceae (v). i Mauritius. 



Rousseauxia DC. Melastomaceae (i). i Madag. 



Rousselia Gaudich. Urticaceae (4). i W.I. 



Rouxia Husn. (Agropynim p.p.). Gramineae (12). i Eur. 



Rouya Coincy (Thapsia p.p.). Umbelliferae (in. 7). i Medit. 



Rowan, Pyrus Aiicuparia Ehrh. 



Roxburghia Banks=Stemona Lour. (Stemon.). 



Roxburghiaceae = Stemonaceae. 



Royal fern, Osmimda; - palm, Oreodoxa regia H. B. et K. 



Roydsia Roxb. Capparidaceae (ill). 5 Indomal. 



Royena L. Ebenaceae. 15 Afr. R. litcida L. useful timber. 



Roylea Wall. Labiatae (vi). i Himalaya. 



Roystonea O. F. Cook. (OreoJoxa p.p.) Palmae (iv. i). 3 N. Am., 

 W.I. 



Rozelle, roselle, Hibiscus Sabdariffa L. 



Rubacer Rydberg (Rulnts p.p.). Rosaceae (in. 2). 5 N. Am. 



Rubber, the coagulated latex of caoutchouc-containing plants, esp. 

 Hevea, Manihot, Castilloa, Landolphia, Fitntuiuia, &c.; now very 

 extensively cult, in the trop., esp. Hevea brasiliensis Muell.-Arg., 

 q.v. See Euphorbiaceae, Apocynaceae, Moraceae, &c. and Willis, 

 Agriculture in the Tropics, Lock, Rubber and Rubber Planting ; 

 African-, Fnntumia, Landolphia, &c. ; Bolivian-, Sapiuw, Borneo-, 

 Wiliughbeia; Ceara -, Manihot Glaziovii Muell.-Arg., &c. ; Central 

 American-, Castilloa; Columbian-, Sapium', Indian-, Ficus elastica 

 Roxb. ; Ire -, Funtitmia ; Lagos -, Funtitmia ; Madagascar -, Lan- 

 dolphiu, &c ; Mangabeira -, Hancornia; Manicoba -, Manihot; 

 Mexican-, Castilioa; Para-, Hevea brasiliensis Muell.-Arg. &c.; 

 Pernatnbuco -, Hancornia ; silk -, Fnntumia ; virgett -, Sapium ; 

 West Indian -, Castilloa ; and see Carpodinus, Clitandra, Eucotninia, 

 Parameria, Mascarenhasia, Urceola. 

 Rubens (Lat.), blush-red. 



Rubeola Tourn. ex Adans. =Crucianella L. (Rubi.). 

 Ruber (Lat.), red. 



Rubia (Tourn.) L. Rubiaceae (n. u). 8 Eur., As., Am. (i in Brit.). 

 R. tinctoruni L. is the madder, formerly cult, for its dye (alizarin), 

 which is now prepared artificially. 



Rubiaceae (EP., BH.}. Dicots. (Sympet. Rubkles). 350 gen., 

 5500 sp., one of the largest fams. of pi. Most are trop., but a number 

 (esp. Galieae) are temp., and Galium itself has a few arctic sp. Trees, 

 shrubs and herbs with decussate slip, entire or rarely toothed 1. The 

 stips. exhibit great variety of form ; they stand either between the 

 petioles (inter petiolar) or between the petiole and the axis (intrapetiolar) , 



