460 



INDEX AND GLOSSARY 



Poinsettia, 352; bracts, 110; starch, 273, 



274. 



Poisonous plants, 247. 

 Polarity, 50. 

 Polemoniacese, 416. 

 Polianthea, 337. 

 Pallards, 56, Fig. 92. 

 Pollen germinating, Figs. 218, 219. 

 Pollen: spores borne by the stamen, 



(270), 133, Figs. 218, 219. 

 Pollination: transfer of pollen from sta- 

 men to pistil, (278). 



Pollinium : pollen in a coherent mass, (301). 

 Polyanthus, 422. 

 Polygalaceae, 378. 

 Polygonacese, 349. 

 Polygonatum, 334. 



Polygonum, 351, Fig. 514; climbing, 112. 

 Polyhedral, 263. 

 Polypetalous: corolla of separate parts or 



petals, (267). 



Polypode, 180, 323, Figs. 333, 334. 

 Polypodium, 180, 323. 

 Polyporus, Fig. 135. 

 Polysepalous: calyx of separate parts or 



sepals, (267). 

 Polystichum, 323. 



Polytrichum commune, 196, Figs. 365-367. 

 Pome: fruit of apple, pear, etc., (324). 

 Pomology, 250. 

 Pond-lily, 361. 

 Poplar, 231; bud, 36; cuttings, 26; 



dioecious, 138; inflorescence, 121; 



Lombardy, 64; phyllotaxy, 48; seeds, 



168. 

 Poppy, 326; family, 362; opium, 271, 



362. 



Pores, 79, 83, 88. 



Portulaca, 159, 371; fruit, Fig. 280. 

 Portulacacese, 371. 

 Potassium, 76. 

 Potato, 4, 16, 19, 32, 35, 68, 77, 160, 249, 



251, 254, 409, Fig. 24; cells, 265; 



cuttings, 23; flower, 144, Fig. 242; 



inclusions, 275; phyllotaxy, 49; sprouts, 



31, 84, 90, Fig. 45; starch, 31, 274, 



275, Fig. 42; stem, 287; sweet, 16, 32, 



Fig. 204; -tomato graft, 28. 

 Potentilla, 386. 

 Pot marigold, 438. 

 Prickles, 109, Figs. 169, 170. 

 Prickly ash, 109, Fig. 169. 

 Prim, 421. 



Primrose, 422; family, 422. 

 Primula, 298, 422. Primulacese, 422. 

 Prince's feather, 351. 

 Privet, 62, 421. 

 Promycelium, 191. 

 Propagation by buds, 21; leaves, 21; 



rhizomes, 18; roots, 19. 

 Prosenchyma, 280. 



Proserpinaca, 208. 

 Proteids, 271. Protein, 271. 

 Proterandrous: anthers maturing first, 



(280), Fig. 222. 

 Proterogynous: pistils maturing first, 



(280). 



Prothallus, 180, Fig. 339. 

 Protococcus, 263. 



263. 

 PTtra^lla, 402. 

 Pruning, 59, 60. 

 Prunus, 387, Figs. 535-539. 

 Pseud-annual: perennial by means of 



bulbs, corms, or tubers, (13). 

 Pteridophyte, 183. 

 Pteris, 267, 289, 323, Fig. 456. 

 Puccinia, 190, 192, Figs. 352-357. 

 Puccoon, 414. 

 Pulse family, 379. 

 Pumpkins, 251, 289; and collenchyma, 



280; corn, 221, Fig. 385; flower, 144; 



fruit, 162; germination, 174; hairs, 298; 



leaf, 100; roots, Fig. 121. 

 Purslane, 159, 241, 242, 243, 371; family, 



371. 



Pusley, 371. 



Pussies of willow, 121, Fig. 60. 

 Pyrus, 391. 

 Pyxis: pod opening around the top, (317), 



Fig. 280. 



Quack-grass, 18, 19, 242, 244, Fig. 27. 

 Quercus, 343, Figs. 500-506. 

 Quillwort, 200. 

 Quince, 251, 271, 391; fruit, 162; Japa- 



nese, 97; -pear graft, 27. 

 Quinin, 271. 



Raceme: simple elongated indeterminate 



cluster with stalked flowers, (249), 



Figs. 184, 197. 

 Radicula, 367. 

 Radish, 7, 12, 17, 33, 69, 70, 75, 368, Figs. 



11, 120; and light, 43, Fig. 75; fruit, 



160. 

 Ragweed, 209, 230, 233, 243, 436, Figs. 



416, 556. 



Ranunculacese, 355. 

 Ranunculus, 357. 

 Rape, 251. 

 Raphanus, 368. 

 Raphe, 172. 

 Raphides, 276. 

 Raspberry, 20, 21, 251, 389; and birds, 



168; fruit, 160, 161, Fig. 290; leaf, Fig. 



142; pruning, 61, Figs. 106, 107. 

 Rattlesnake plantain, 341. 

 Rattlesnake-weed, 436. 

 Ray: outer modified florets of some com- 



posites, (305). 



