INDEX AND GLOSSARY. 



223 



Organs of Vegetation : root, stem, 

 and leaves. 



Orthostichies, 160. 



Orthotropous : applied to ovules 

 when straight, so that the mi- 

 cropyle is as far as possible from 

 the point of attachment, 246. 



Osmose, 314. 



Outline of leaves, 171. 



Oval, Fig. 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, 106, 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, 5, 28. 



Peltate, 126, 175. 



Pentamerous flowers, 196. 



Pentandrous : with five distinct 

 stamens. 



Pepo, 233. 



Perennial : a plant which con- 

 tinues to grow year after year, 



Perfect : having both stamens and 

 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. 



Petaloideous, 359. 



Petiolate : having petioles. 



Petiole, 4. 



Phanerogamous or Phsenogamous, 

 129, 359. 



Phellogen, 294. 



Phloem, 295. 



Phosphorus, 307. 



Phyllome, 225. 



Phyllotaxis, 158. 



Pileus, 347. 



Pilose : having long, soft hairs. 



Pinna: a primary division of a 

 pinnately-compound leaf. 



Pinnate, 168. 



Pinnately-lobed, 176. 



Pinnatifid, 176. 



Pinnule : a secondary division of 

 a pinnately-compound leaf. 



Pistil, 7, 13, 215. 



Pistillate : having a pistil, 68, 70. 



Pitcher-shaped (leaf), Fig. 169. 



Pith, 300. 



Placenta, 221. 



Placentation, 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. 



Pollination, 124, 247. 



Pollinia : pollen-masses, Fig. 9?. 



Polyadelphous, 40, 212. 



Polyandrous: with numerous dis- 

 tinct stamens, 6, 24. 



Polycarpellary, 215. 



Polygamous: having perfect as 

 well as imperfect flowers. 



Polygamo-dicecious, 76. 



Polypetalous : having separate 

 petals, 5, 207. 



