Rhizophyllous 



OF BOTANICAL TERMS. 



Rosette 



RHIZOPHYL'LOtJS, emitting roots 

 from the leaves. (Rare.) 



RHIZOTAX'IS, the position or 

 order of arrangement of the 

 roots upon a plant; radication. 

 Compare Phyllotaxis and 

 Caulotaxis. 



RHI'ZOtAXY, see Rhizotaxis. 

 RHODOL'OGY, the part of botany 

 which treats of roses. 



RHO'DOPHYL, the compound 

 pigment which is the coloring 

 matter of red algse, the Flo- 

 ridese. 



RHODOSPER'MIN, crystalloids of 

 proteid found in the Florideae 

 containing the rhodophyl or 

 red coloring matter. 



RIB, a large prominent vein. 



RIBBED, (1) having more than 

 one prominent longitudinal 

 vein; (2) applied to an apple 

 or other fruit with large longi- 

 tudinal ridges. 



RICTUS, an old term for the 

 throat of a personate flower. 



Rf GfiS'CENT, approaching a rigid 

 or stiff consistence. (M. C. 

 Cooke.) 



RIGHT, see remarks under Dex- 

 trorse and Left. 



Rf MA (pi. Ri'mae), a chink or 

 cleft. 



RIMOSE', abounding with chinks, 

 clefts, or cracks, as the bark 

 of many trees and the thallus 

 of certain lichens; rimous, 



RIM OTIS, see Rimose. 



RIM'tJLOSE, diminutive of Ri- 

 mose. 



RIND, see Cortex. 



RING, see Annitlus. 



RINGED, see Annulated. 



RlN'GENT, bilabiate, with the 

 lips widely separated and the 

 throat open, as in Lamium. 

 Compare Personate. 



RIPA'RIAN, see Riparious. 



RIPA'RfOtJS, growing along riv- 

 ers or other water-courses; 

 riparian. 



RlVOSE', having sinuate channels. 

 Compare Sulcate. 



RlVtJLOSE, having small sinuate 

 channels. Compare Striate. 



R6D - FRTJCTIFiCA'TION, un- 

 branched gonidiophores in 

 Basidiomycetes. 



ROGUE (Hort), an inferior sport 

 or variation, i.e., a plant which 

 deviates in an undesirable man- 

 ner from the type of the species 

 or variety. 



ROOT, the descending axis; — 

 differing in character from 

 the stem chiefly in being des- 

 titute of leaves. Compare Rhi- 

 zoid and Rhizome. Sachs ex- 

 tends the term Root to the root- 

 like organs (rhizoids) of cel- 

 lular plants. 



ROOT-CAP, a protective covering 

 to the growing extremity of 

 roots; calyptra; pileorhiza. 



ROOT-HAlR§, slender hairs upon 

 tbe younger roots, which serve 

 to absorb food from the soil. 



ROOT -LEAF, a leaf springing 

 from the base of the stem. 



ROOT - PRfiS'StrRE, see Sap- 

 pressure. 



RO"OT'LET, a small root; root- 

 fibre. 



ROOT -SHEATH, see Coleorhiza. 



ROOT'STOCK, see Rhizome. 



RO'RlDUS, covered with trans- 

 parent elevations resembling 

 drops of dew. (Obs.) 



R0§A'CE0tJS, rose-like, or be- 

 longing to the family Rosaceae. 



RO§EL'lA (obs.), see Rosette. 



RO§ETTE', a cluster of leaves or 

 other organs arranged some- 

 what like the petals of a 



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