GLOSSARY. 353 



Radicle:: tlie lower part of tlie caulicle in the embryo which 

 develops into the root. 



Radix: root. 



Mamoge:: bfainching. 



Raphe : the seed-stalk -or funlculns wlien applied (adliermg) to the 

 ovuie, as ia an anatropous ovule. 



Raphides : aeedle-shaped crystals in the cells. 



Ray : a marginal flower, especially if ligulate. 



Receptacle : the enlarged end of an axis or peduncle which supports 

 a head of flowers. 



Reflexed : bent backwards. 



Regular flower: the members in each whorl alike in shape and size. 



Rejuvenescence : one process ■of oeU-formation, as by all of the proto- 

 plasm in t, cell -contfacting and iiseii becoming a new cell. 



Reniform: kidney -shaped. 



Repand : with a wavy margin. 



Repent: creeping. 



Resting spore: a zygospore. 



Reiietdate : netted -, as reticuJate -veirra. 



Retrorse : direc^d downwards or backwards. 



Retting : the process «f prepaiing Flax, etc., by nraceration tvt other- 

 wise in order to effect a sepacatioH of the fibre from the stem. 



Retuse : with a. shallow or obscure notch in a rounded apex. 



Reversion : petals changing back to sepals, stamens to petals, etc. 



RevoliUe : rolled backwards. 



Rhaehis : the axis of a compound lea^ llower-cluste:, etc 



Rhaphe : the funiculus or «eed-stalk when confluent wiQi the side 

 of an anatroipous ovule; raphe. 



RJiisoids : hairs which, as in Mosses, etc., perform the fiinction of 

 roofs. 



Rhizome: root-stock; subterranean stem. 



Rib : a prominent vein in a, leaf; a ridge 



Riibed : having ribs. 



Ringent : gaping. 



Root : the descending axis of a plant, tipped with a root-cap, desti- 

 tute of leaves, etc 



Root-cap : the mass of oells at the tip of the root covering its grow- 

 ing pc4nt. 



Root-hairs: the minute hairs or outgrowtlis from surfiice cells of 

 the root. 



Rootlet : a little root, or branchlet of a root. 



Rootstock : rhizome ; root-like stem or trunk on or under ground. 



Rosaceous : like a rose. 



RosteUate: with a small beak. 



Rosiellum : a beak ', the prtrtuberance 5a Orchid-flowers in which the 

 lower ends of the oaudicles of the polUnia are enclosed. 



Rostrate: beaked. 



Rotate: wheel-shaiped. 



Rotation of protaplasm, : mass movement of protoplasm in cells. 



Rugose: wrinkled, 

 23 



