XVIII 



oatgrass (Danthonia), G45 (Continued. 



onespike (D. unispicata), G45. 



Parry (D. parryi) , O46. 



poverty (D. spicata), G46. 



tall (Arrhenathcrum elatius), G22. 



timber (D. intermedia), G47. 

 oceanspray (Sericotheca discolor), B147. 

 Odostemon (hollygrape) , BW). 



aquifolium (Oregon-grape), B 100. 



fremontii (Fremont hollygrape), B99. 



haematocarpus (red h.)> B99. 



nervosus (longleaf h.), B99. 



repens (creeping h. ), B99. 

 oleaster, wild. See buffaloberry, russet. 

 olive, wild. See buffaloberry, russet. 

 onion (Alliura; A. cepa), Wll. 



nodding (A. cernuum), Wll. 

 oniongrass (Melica; M. bulbosa), G7S. 



little (M. fugax), G78. 



showy (M. spectabilis), G78. 



Yosemite (M. inflate), G78. 

 opopanax. See acacia, sweet. 

 Opulaster (ninebark) , BIOS. 



capitatus (Pacific n.), BIOS. 



malvaceus (mallow n.), BIOS. 



monogynus (mountain n.), BIOS. 



paucillorus. See O. malvaceus. 

 Opuntia (pricklypear, flat-stemmed spp.; cholla, 

 cylindrical-stemmed spp.) 



arborescens (cholla), Bl 06. 



engelmanni (Engelmann pricklypear), B106. 

 ora, copa de. See California-poppy. 

 Orbexilum. See Psoralea. 

 Oregon-grape (Odostemon aquifolium), B100. 

 Oregon-grape. See hollygrape, lomtleaf. 



scaly. See hollygrape, longleaf. 

 Oreobatus. See thirnbleberry. 

 Oreostemma. See Aster. 

 orthocarp. See owlclover. 



yellow. See owlclover, yellow. 

 Orthocarpus (owlclover), W1S6. 



erianthus, W1S6. 



luteus (yellow owlclover), W136. 



purpurascens (purple o.), W136. 



purpureo-albus (purple- whi te o.), W136. 

 Oryzopsis (ricegrass) 



cuspidata. See O. hymenoides. 



hymcnoides (Indian ricegrass), G88. 

 osha. See loveroot; loveroot, fernleaf; loveroot. 



Porter. 

 Osmorhiza (sweetroot), W68, W137. 



occidentals (sweet-anise), W137. 

 owlclover (Orthocarpus), W186. 



purple (O. purpurascens), W1S6. 



purple-white (O. purpureo-albus), W1S6. 



yellow (O. luteus), W136. 

 owls-claws. See sneazeweed, orange. 

 oxytrope. See crazy weed; pointvetch. 

 Oxytropis (crazy weed, spp. causing locoism; point- 

 vetch, harmless spp.), W138. 



albiflora [(A. Nels.) K. Schum., not Bunge], 

 See O. saximontana. 



besseyi (Bessey pointvetch), W138. 



lagopus (haresfoot crazy weed), W1S8. 



lambertii (crazy weed), W139. 



macounii (spike c.), W138. 



richardsonii (whorled c.), W1S8. 



saximontaita (Rocky Mountain c.), \V138. 



spicata [(Hook.) Standl., not (Pal!.) O. <fe B. 

 Fedtsch.]. See O. macounii. 



splendens (showy crazy weed), W1SS. 



splendens richardsonii. See O. richardsonii. 

 Pachistima (boxleaf) 



canbyi (Canby b.), B107. 



myrsinites (myrtle b.), B107. 

 Paeonia brownii (Browns peony), W140. 

 paintbrush (Castilleja), W49. 



Indian (C. coccinea), W49. 



narrowleaf. See Wyoming paintbrush. 



Wyoming (C. linariaefolia), W49. 

 painted-cup (Castilleja), W49 

 palmilla. See yucca, soaptree. 

 panicgrass (Panicum), G89. 



Arizona (P. arizonicum) , G89. 



blunt. See vine-mesquite. 



bulb (P. bulbosum), GOO. 



little bulb (P. bulbosum minus), G90. 

 Pacific (P. pacificum), G89. 

 Savannah (P. gymnocarpon), G91. 



panicgrass (Panicum), G89 Continued. 



Scribner (P. scribnerianum) , G89. 



silky. See cottongrass, Arizona. 



vine. See vine-mesquite. 

 Panicularia. See Glyceria. 



nervata. See G. striata. 



nervata elata. See G. elata. 



rigida. See G. striata. 

 Panicum (panicgrass), G89. 



antidotale, G89. 



arizonicum (Arizona panicgrass), G89. 



barbinode. See P. purpurascens. 



barbipulvinatum (cushion witchgrass), G89. 



bulbosum (bulb panicgrass) , G90. 



bulbosum minus (little bulb p.), G90. 



bulbosum sciaphilum. See P. bulbosum 

 minus. 



capillare (witchgrass), G89. 



digitarioides (maidencane). G89. 



gymnocarpon (Savannah panicgrass), G01. 



maximum (Guinea grass), G89. 



miliaceum (proso), G89. 



obtusum (vine-mesquite), G'.M. 



pacificum (Pacific panicgrass), G89. 



purpurascens (Para grass), G89. 



scribnerianum (Scribner panicgrass), G89. 



virgatum (switchgrass). G89. 



walteri. See P. digitarioides. 

 Papaver (poppy) 



somniferum (opium p.), W76. 

 Para grass (Panicum purpurascens) , G89. 

 paradise-flower. See catclaw. 

 parsnip. See waterhemlock. 



cow-. See cow-parsnip. 



woollyhead-. See woollyhead-parsnip. 

 pasqueflower (Pulsatilla) 



American (P. ludoviciana), Wi, r ,(). 



European (P. vulgaris), W159. 



western (P. occidentals) , W159. 

 pea 



blue-. See lupine. 



buffalo-. See goldenpea; goldenpea, mountain. 



Montana-. See goldenpea, mountain. 



red-and-yellow-. See red-and-yellow-pea. 



wild yellow. See goldenpea, mountain, 

 peavine (Lathyrus), W102. 



Arizona (L. arizonicus), W102. 



aspen (L. leucanthus), W102. 



bush (L. eticosmus), W101. 



cream (L. ochroleucus), W102. 



fewflower (L. pauciflorus) , WIQZ. 



marsh (L. palustris), WlOt. 



Nuttall (L. nuttallii), W102. 



Sandberg (L. bijugatus sandbergii), W102. 



sulphur (L. sulphurous), W101. 



thickleaf (L. coriaceus), W10Z. 

 Pedicularis (fernleaf), W142. 



bracteosa (northern f.), WHS. 



canadensis (early f.), W1I$. 



crenulata (meadow f.), WHS. 



densiflora (Indian- warrior) , WH&. 



gray! (Grays fernleaf), WHS. 



groenlandica (elephanthead), AV143. 



lanceolata (swamp fernleaf), W1JS. 



palustris (European f.), W11&. 



racemosa (sickletop), WHS. 



surrecta. See P. groenlandica. 

 Pediomelum. See Psoralea. 

 pe-ik. See mules-ears, 

 pennycress (Thlaspi), W1S7. 



field (T.arvense), W187. 



mountain (T. alpestre), W187. 

 pennygrass. See pennycress. 

 Pentstemon, W144- 



abietinus (firleaf p.), W1U- 



aggregatus. See P. rydbergii. 



azure (P. azureus), W144- 



azureus (azure pentstemon), W144- 



blue (P. glaber), WH4- 



blueleaf (P. glaucus), W144. 



breviflorus (stubflower pentstemon), W144- 



bush (P. fruticosus), WH4- 



coloradensis (Colorado pentstemon), W144- 



Colorado (P. coloradensis), W144- 



cyananthus (Wasatch pentstemon), W144- 



eggleaf (P. ovatus), W144- 



ellipticus (rockvine pentstemon), WH4- 



firleaf (P. abietinus), WH4- 



fruticosus (bush pentstemon), W144. 



