INDEX. 



315 



Pleurisy Boot, 199. 



Plicate, folded like a fan, 183. 



Plumous, like a plume ; leathery, 



Plumule (a little plume), 111. 



Poa, 271. 



Poet's Narcissus, 262. 



Poinciana, 125. 



Pollen, abundance of, 32. 



Pollenization, curious facts in, 41, 60, 74, 



77 80, 82, 85, 91, 118, 128, ia r >, 145, 157, 



163, 173, 180, 197, 201, 207, 235, 



236, 237, 240, 243. 

 Pollinia, masses of pollen, 197. 

 Poly (in composition), many ; as 

 Polyandrous, with many stamens, 

 Polyanthus 168,261,263. [47. 

 Polygonaceae, 203. 

 Polygonum, 200. 

 Polypetalous, with the petals free and 



distinct, 142. 

 Polypod Fern, 20. 

 Polytrichum, 15. 

 Pome, a fruit like an apple, 108. 

 Poor-man's-weather-glass, 168. 

 Poppy, 68. 

 Poppy Bee, 70. 

 Poppy worts, 67, 70. 

 Portulaca, 43, 91. 

 Portulacaceae, 43. 

 Posterior, next to the axis. 

 Potato, Sweet, 187. 

 Potentilla, 112. 



Precocious, flowering before leafing. 

 Premorse, ending abruptly, 246. 

 Prickles, distinguished from thorns, 114. 

 Pride-of-Ohio, 161. 

 Primrose, 125, 168. 

 Primulace;ie, Primworts, 161, 168. 

 Prince's Pine, 152. 

 Prismatic, shaped like a prism, 3, 4, or 



many-sided. 



Procumbent (stem), lying prostrate. 

 Produced, unusually extended. 

 Proterandrous, 82. 

 Proliferous, reproducing, as cymes from 



the midst of a cyme, flowers from the 



midst of a flower. 

 Prothallus, 22. 

 Provinces, 33, 43. 

 Prunus, 116. 

 Pteris, 27. 



Pubescent, downy with short, soft hairs. 

 Puberulent, minutely downv. 

 Pnlsatilla, 62. [needle. 



Punctate, dotted, as if punctured with a 

 Purple-fringed Orchis, 238. 

 Purslanes, 43. 



Pyriform, of the form of a pear. 

 Pyrus, 112, 117. ^H 



Pyrola, 150. J|hJ 



Pyxis, a pericarp with a lid, 43, 169. ^~? 



Quadrangular, four-angled. 



Quality, the external traits, affecting the 



senses, 260. 

 Quamash. 258. 

 Quercus, 208. 



ince, 117. 



inate, growing in fives, 

 incuncial aestivation, 42, 106, 

 uinque (in composition), five 



R. 



Raceme, flowers arranged as hi Cur- 

 rant, 41, 201. 



Rachis, the axis of an inflorescence, 

 etc., 24, 41. 



Radiant Head, flowers all ligulate, 144. 



Radiate head, the outer row of flowers 

 ligulate, 145. 



Radical, springing from the root, 47, 54. 



Radicle, the root end of the embryo. 



Radicle accumbent, 103. See Accumbent. 



Radicle incumbent, 100. See Incumbent. 



Radish, 103. 



Ramial, of a branch (ramus). 



Ranunculacea?, 59, 62. 



Ranunculus, 48. 



Ran stead, 174. 



Rape-seed oil, 103. 



Rays (of the Composites), 142. 



Rays of an Umbel, 132. 



Receptacle, where the florets of a Com- 

 posite stand, 139. 



Receptacle chaffy, 145. 



Receptacle naked, 139. 



Reclined, the leaf in bud bent over 

 forward. 



Recurved, bent (not rolled) back- 

 ward, 31. 



Red Maple, 192. 



Red Oak, 210. 



Reduplicate-valvate aestivation, 

 the valves with recurved edges. 



Reflexed, bent back excessive- 

 ly, 52. 



Regma, the fruit of the Geranium, 



85. 



i Regular, like parts similar, 

 73. 



Reniform, kidney-shaped, 

 73, 177. 



Repand toothed, 126. 



Reproductive organs, 

 29. 



Resupinate, reversed; 

 upside down, 72. 



Reticulate, netted, 47. 



Retuse, the apex broadly 

 indented. 



Revolute, rolled backward. 



Rheum, 203. 



Rhizoma, Rhizome, 20. ^ 



Rhombic, of the shape of 



a rhomb. ""^SaT 



J Rhododendron, 158. C ^M& 



\ Rhubarb, 203. 



Ribs, ridges on the fruit of the Umbel- 

 worts, 135. 



Richardia. 232. 

 ! Ricinus, 206. 

 I Ringent (corolla), the throat open. 



! Roblnia, 121. 



Robin's Plantain, 140. 



Rock Maple, 188. 



