INDEX AND GLOSSARY. 



223 



Organs of Vegetation : root, stem, 

 and leaves. 



Orthostichiea, 160. 



Orthotropous : applied to ovules 

 when straight, so that the mi- 

 cropylo is as far as possible from 



,. the point of attachment, 246. 



Osmose, 314. 



OuEline of leaveai 171. 



Oval, Pig. 146. 



Ovary, 7,25. 



Ovate, Fig. 148. 



Ovoid: egg-shaped. 



Ovule, 7, 16. 



Oxygen, 307. 



Palate, 209. 



Palet, 101. 



Palmate,-168. 



Palmately-lobed, 176. 



Palmatifid, 176. 



Panicle, 10.6, 190. 



Papilionaceous, 39. 



Pappose, 206. 



Pappus: a circle of bristles or 

 hairs representing the limb of 

 the calyx in flowers of the Com- 

 posite Family, 62. 



Parallel- veined : same as straight- 

 veined, 83. 



Paraphyses, 353. 



Parasites, 135, 156, 310. 



Parenchyma, 286. 



Parietal : on the walls, 221. 



Parted: almost completely cut 

 through. 



Pectinate: pinnatifid with lobes 

 like the teeth of a comb. 



Pedate, Fig. 160. 



Pedicel, 28, 58. 



Peduncle, 6, 28. 



Peltate, 126, 175. 



Pentamerous flowers, 196. 



Pentandrous : with five distinct 

 stamens. 



Pepo, 233. 



Perennial: a plant which con- 

 timies to grow year after year, 

 136. 



.Perfect: having both atameoa S^od 

 pistil. 



Perfoliate, 179. 



Perianth, 84, 90. 



Pericarp, 229. 



Perigynous, 40, 48, 213, 216. 



Perisperm, 248. 



Peristome, 341. 



Permanent tissue, 285. 



Persistent, 34, 206. 



Personate, 209.^ 



Petal, 5, 207. i 



Petaloideous, 359. 



Petiolate : having petioles. 



Petiole, 4. 



Phanerogamous or Phaenogamous, 

 129, 359. 



Phellogen, 294. 



Phloem, 295. 



Phosphorus, 307. 



Phyllome, 225. 



Phyllotaxis, 158. 



PileuB, 347. 



Pilose : having long, soft liairs. 



Pinna: a primary division of a 

 pinnately-compound teaf. 



Pinnate, 168. 



Pinnately-lobed, 176. 



Pinnatifid, 176. 



Pinnule : a secondary division of 

 a pinnately-oompouud leaf. 



Pistil, 7, 13, 215. 



Pistillate : having a pistil, 68, 70. 



Pitcher-shaped (leaf). Fig. 169. 



Pith, 300. 



Placenta, 221. 



Flacentation, 221, 



Plaited, 166, 210. 



Plumose : feathery. 



Plumule, 79, 117, 138, 252. 



Pod : a dehiscent fruit, 25, 



Pollen, 6, 16. 



Pollen-masses, 92. 



Pollen-tube, 16. 



PoUination, 124, 247. 



PoUinia : pollen-masses. Fig. 9?. 



Polyadelphous, 40, 212. 



Polyandrous : with numerous dis- 

 tinct stamens, 6, 24. 



Polyoarpellary, 215. 



Polygamoiis: having perfect aa 

 well as imperfect flowers. 



Polygamo-dioscious, 75. 



Polypetalous : having separate 

 petals, 6, 207. 



