INDEX 
Peabush—Continued. 
feather (P. formosa), 85. 
James (P. jamesii), 85. 
Parry (P. parryi), 85. 
silver (P. argyraea), 85. 
7Peach (Amygdalus; A. persica), 66, 69, 70. 
wild, 69, 70. 
Peachbrush (Emplectocladus), 69-70. 
Anderson (E. andersonii), 70. 
wild, 69, 70. 
+Pear (Pyrus), 65. 
Peat, 131, 1305 
Peavine. See Pea, wild. 
Pellett, Frank C., 141, 185. 
Pennell, Francis W., 1438, 185. 
Penistemon, 10, 133, 143-144. 
Barrett (P. barrettae), 143. 
barrettae (Barrett p.), 143. 
breviflorus (stubfiower p.), 144. 
bush (P. fruticosus), 143, 
cliff (P. rupicola), 143. 
Davidson (P. davidsonii), 143. 
davidsonii (Davidson p.), 143. 
Douglas p. (P. douglasii), 143. 
dougilasii (Dougias p.), 143 
fruticosus (bush p.), 1438. 
Lemmon (P. lemmonii), 144. 
lemmonii (Lemmon p.), 144. 
Lewis (P. lewisii), 143. 
lewisii (Lewis p.), 14 
littleleaf (P. microphyllus), 144, 
Lyall (®. lyallii), 143. 
lyallti (Lyall p.), 143. 
Menzies (P. menziesii), 143. 
menziesii (Menzies p.), 143. 
microphyllus (littleleaf p.), 144, 
Newberry (P. newberryi), 143. 
newberryi eters p.), 143 
rupicola (cliff p.), 143. 
Seouler (P. eae 143. 
scouleri (Scouler p.), 143. 
stubflower (P. breviflorus), 144. 
+Peppertree, California (Schinus molle), 95. 
Pepperwood, 39. 
Boor ena P. ramosissimum (squaw-apple), 
79 
Perisoreus obscurus (Oregon shlong 
Persea americana (avocado), 38. 
Pests, plant, 53, 55, 89, 111, 114, 116, 123, 
163, 166, 178. 
Peterson, Jesse L., 4. 
Peyote (Lophophora williamsii), 118, 
Philadelphus (mockorange), 40, 180. 
lewisii (Lewis m.), 40. 
Phlox, false, 139 
family, 139. 
whorl, 139. 
Phoradendron (mistletoe), 26. 
flavescens (American m.), 27. 
Photosynthesis, 115. 
Phyla (fogfruit), 140. 
Phyllodoce (mountain heath), 132, 180. 
breweri (Brewer m. ii.), 1 ion! 
empetriformis (red m. h.), 132. 
glandulifiora (cream m. h.), 132. 
Phymosia, 115. 
Physocarpa, 57. 
Physocarpus, 57. 
Phyito- bezoars, 118. 
Picea (spruce), 11. 
yabies (Norway s. ), 11, 
excelsa, 11. 
Pickleweed, 34, 36. 
Pieris mariana (staggerbush), 9 5 
Pignut, 
Pinaceae, 10242, 
Pinball, 145. 
inbal 
Pine (Pinus), 10, 11, 49, 100, 134, 176. 
pray ss value of, —11. 
amily 
lodgepole, 65, 119, 182, 133. 135, 136, 
149. 
reproduction, 107. 
BME: 25. ES 
western white, 
western yellow, 21, 25, 48, 48, 49, 50, 
53.55, 57, 6d, 66, 68, 85, 87, 98, 100, 
105, 109, 119, 123, 124, UB; 142) 
148 149, 150. 
205 
Pine—Continued. 
white, 42, 43. 
whitebark 65. 
yellow. See Pine, western yellow. 
Pinemat (Arctostaphylos nevadensis), 124. 
Pink, prairie, 177. 
Pinole, 87, 105. 
Pinon (Pinus edulis), 2, 3, 11, 22, 37, 39, 50, 
55, 70, 91, 96, 97, 111, "423, 137 140, 1417 
148, 155, ‘176. 
singleleaf pinon (P. monophylla), 11. 
Pinus (pine; pifion), ae niece 
edulis (pifion), 1 
monophylia (singleleaf pifion), 11. 
Pioneer species, 97, 109. 
Piper, Charles V., 23, 63, 149, 185, 189. 
Pipsissewa, common (Chimaphila umbellata), 
Pistache (Pistacia; P. vera), 95. 
Mexican (P. mexicana), 96 
Texas (P. texana), 96 
Pistacia (pistache), 95. 
mexicana (Mexican p.), 96, 
texana: (Texas p.), 
fvera (pistache), 95. 
Pithecollobium unguis-cati (blackhead), 71. 
Pithecolobium. See Pithecollobium. 
Plant succession. See Succession, plant. 
Pleiacanthus spinosus, 179. 
Pluchea borealis, 164. 
sericea (arrowweed), 164. 
Plum (Prunus spp.), 7, 66, 69. 
yjcommon (P. demestica) 66. 
desert, 70. 
Indian, 70. 
Klamath, 69. 
Pacific (P. subcerdata), 69. 
sand (P. angustifolia watsoni), 2. 
Sierra, 69 
wild (sec. Prunophora). 6 
Plumas National Forest, 146. 
Plume, Apache (Fallugia paradoxa), 7, 50-51. 
Poisoning, livestock. See Poisonous spe- 
cies, 
Poisonous seeds, 94. 
Poisonous species (of browse plants), 3, 5, 
heer On tile GO 2 Ze moO meee 
67, 683/69) (82,985, 8555 86, 87, 89, 90, 
91; 92, (93, 94,98; 102, 104, 107, 111 f 
113; 118; £22, 123, 126, 127, 128, 130, 
131, 182; 133, 186, 137, 139, 142, 143, 
145, 146, 147, 149, 156, 155, 156, 157, 
158°) 163.) 164, 166, AGO win ze is. hats 
178, 179 
Polemoniaceae, 139. 
Peliomintha, 140. 
Pollen, 19, 102. 
Polycodium, 133. 
Polygala acantheclada (thorn Pe) 93. 
senega (seneca-snakeroot), 9 
spiny (P. subspinosa), 93. 
subspinosa (spiny p.), 93. 
thorn (P. acanthoclada), 93. 
Polygalaceae, 98. 
Polygonaceae, 9, 27. 
Ponil, 50. 
Poplar (Populus), 9, 16. 
Populus (poplar; aspen; cottonwood), 9, 16-17. 
aurea, 1 
tremuloides; P. 
pen), 17. 
Poreleaf, slender, 166. 
Porophyllum gracile (yerba-del-venado), 166. 
Potash, 86. 
Potassium salts, 35. 
Potato family, 142-143. 
Potentilla fruwticosa, 355. 
tenwifolia, 57. 
Potherbs, 27. 
Pott, Emil, 11, 185. 
Prairies, 27. ‘See Plains. 
Braniblake Ac blas 
Prescott National Forest, 73, 94. 
Prickleaf (Dysodia acerosa), 166. 
Prickles (plant), 116, 118, 146. 
Pricklypear (sec, Platopuntia, 
tia), 116-118. 
Engelmann (QO. engelmanni), 117, 118. 
Prien, O, L., 157, 185. 
tremuloides aurea (as- 
genus Opun- 
