248 



BOTANY. 



Peltigera, 75 ; Fig. 45. 

 Penicillium, 71 ; Fig. 42. 

 Pepper, 183. 



Perianth. See " Perigone." 

 Periblem, 170. 

 Perigone, 143, 148, 151, 170. 

 Perisperm, 163. 

 Perisporiacese, 66. 

 Periwinkle, 219. 

 Peronospora, 60; Fig. 35. 

 PeronosporesB, 57. 

 Persimmon, 212; Fig. 117. 

 Petal, 148, 174, 179. 

 Petiole, 173. 

 Petunia, 215; Fig. 119. 

 Peziza, 73 ; Fig. 43. 

 Phacelia, 214. 



Phseophycese. See "Brown algae." 

 Phaenogam. See " Spermaphyte." 

 Phascum, -acese, 99, 101; Fig. 65. 

 Philadelphus. See " Syringa." 

 Phloem, 110, 124, 135, 137, 150, 173, 176. 

 Phlox, 214; Fig. 118. 

 Phcenix dactylifera. See " Date- 

 palm." 



Phosphorus, 2. 

 Phragmidium, 81 ; Fig. 47. 

 Physarum, 14. 

 Physianthus, 220. 

 Physiology, 3. 



Phytolacca, -acese. See "Poke-weed." 

 Phytophthora, 60. 

 Pickerel-weed, 156, 228; Fig. 84. 

 Picric acid, 156, 233. 

 Pig- weed. See " Amaranth." 

 Pine, 9, 10, 129, 142. 

 Pine-apple, 156. 

 Pine-sap, 210; Fig. 116. 

 Plngutcula, 218. 

 Pink, 181,185; Fig. 97. 

 Pink-root, 218; Fig. 122. 

 Pinnate (leaf), 159. 



veined, 171. 



Pinnularia, 42 ; Fig. 24. 

 Pinus sylvestris. See " Scotch pine." 



Piper. See "Pepper." 



Piperinese, 183. 



Pistil, 143, 145, 174. 



Pitcher-plant, 194, 195 ; Fig. 105. 



Pith, 130, 174, 177. 



Placenta, 148, 179. 



Plane, 183. 



Plantago, -inese. See " Plantain." 



Plantain, 223, 225 ; Fig. 121. 



Plasmodium, 12. 



Platanese. See " Plane." 



Platanus. See " Sycamore." 



Plerome, 176. 



Plum, 207. 



Plumbago, -inese, 212. 



Pod, 156. 



Podophyllum. See " May-apple." 



Podosphsera, 66-70; Fig. 39. 



general structure, 66. 



structure of filaments, 68. 



suckers, 68. 



conidia, 68. 



sexual organs, 68. 



spore fruit, 68, 69. 



spore sac, 69. 

 Pogonia, 166. 

 Poinsettia, 199. 

 Poison-dogwood, 198. 

 Poison-hemlock, 202. 

 Poison-ivy, 171, 198. 

 Poke-weed, 185; Fig. 97. 

 Polemonium, -acese, 214 ; Fig. 118. 

 Pollinium, 165. 

 Polycarpse, 185. 



Poly gala, -acess. See " Milk- wort." 

 Polygonatum. See "Solomon's Seal. 

 Polygonurn, -acese, 184; Fig. 98. 

 Polysiphonta, 52; Fig. 29. 

 Pomegranate, 206. 

 Pond-scum, 22, 29, 30. 

 Pond-weed, 159; Fig. 86. 

 Pontederia. See " Pickerel-weed." 

 Poplar, 181, 183. 

 Poppy, 191. 

 Portulaca, -acex. See " Purslane." 



