564 RHAPHITAMNUS 



Rhaphitanimis Miers. Verbenaceae (i). i Chili. 



Rhapidophyllum H. Wendl. et Drude. Palmae (i. 2). i S.E. U.S. 



Rhapis L. f. Palmae (i. 2). 5 E. As. Cult. orn. 



Rhaponticum (Vaill.J Hall. =Centaurea L. p.p. (Comp.). 



Rhaptonema Miers. Menispermaceae. i Madag. 



Rhaptopetalum Oliv. Scytopetalaceae (Olacin. BH.}. 5 trap. Afr. 



Rhatany root, Krameria. 



Rhazya Decne. Apocynaceae (i. 3). 2 W. As. 



Rliea. Boehnieria nivea Gaudich. 



Rheedia L. Guttiferae (v). 17 trop. Am., Madag. 



Rhektophyllum N'.E. Br. Araceae (iv). i trop. W. Afr. 



Rheotropism, sensitiveness to water stimulus. 



Rhetinodendron Meissn. Compositae (8). i Juan Fernandez. 



Rhetinosperma Radlk. Sapindaceae (i). i Queensland. 



Rheum L. Polygonaceae (I. 2). 20 temp, and subtrop. As. Fls. like 

 Rumex, but coloured and entomophilous, though they exhibit traces 

 of anemophily in very large stigmas (cf. Poterium, &c.). R. ojficinale 

 Baill. furnishes medicinal rhubarb; R. Rhaponticum L. is the rhubarb 

 used as a vegetable. 



Rhexia L. Melastomaceae (i). 7 E. U.S. 



Rhigiocarya Miers. Menispermaceae. i trop. W. Afr. 



Rhigiophyllum Hochst. Campanulaceae (i. i). i S. Afr. 



Rhigospira Miers (Tabernaemontana L.). Apocynaceae (i. 3). 7 Brazil. 



Rnigozum Burch. Bignoniaceae (2). 5 S. Afr. 



Rhinacanthus Nees. Acanthaceae (iv. B). 6 palaeotrop. 



Rhinanthus L. (incl. Fistularia L.). Scrophulariaceae (in. 3). 9 

 Eur., Medit., M. Am.; 2 in Brit, (yellow-rattle), common in damp 

 pastures. Semi-parasites with loose pollen fls. (see fam.). 



Rhinopteryx Niedenzu. Malpighiaceae (i). i Gambia. 



Rbipidium, a monoch. cyme where each successive branch falls alt. on 

 one side and the other of the relatively main axis, and all fls. are in 

 one plane, Iris, Juncus. 



Rhipogonum Forst. Liliaceae (xi). 5 E. Austr., N.Z. 



Rhipsalis Gaertn. (incl. Hariota, Pfeijfera). Cactaceae (ill. 3). 50 

 Brazil, Argentina. R. Cassytha L. is found in Ceylon and Madag., 

 but quite possibly introduced (the only cactus out of Am. ; see fam.). 

 Epiph., rarely thorny, sometimes of Cereus-like structure, sometimes 

 Phyllocactus-like, or with cylindrical stems (compare sp. of Euphorbia). 

 Fr. fleshy. 



Rhiz- rMzo- (Gr. pref.), root; -carp, pi. with sporangia on root-like 

 processes, Marsileaceae\ -me, see separate article; -opliore, Selaginella. 



Rhizanthemum VanTiegh. (Loranf/ntsp.p.). Loranth. (i). 2 Malaya. 

 Rhizanthous. flowering from the root. 



Rrjizofooleae = Caryocaraceae. 



Rhizocephalum Wedd. Campanulaceae (ill). 4 Andes. 

 Rliizoma galangae, Alpinia officinarum Hance. 



Rhizome, an underground creeping stem, usu. thickened, and mono- or 

 sympodial, Acorus, Alismaceae, Anemone, Asparagus, Balanophoraceae, 

 Bambusit, Begonia, Bellis, Cyperaceae,Dioscorea,Equisetum, Eranthis, 

 Gmmhieae, Iridaceae, Juncaceae, Lamiitm, Liliaceae, Mnsa, Ophio- 

 glossaceae, Petasites, Fteris, Ranunculaceae, Typha, Zingiber. 



