XX 



porcupinegrass. See feathergrass, New Mexican- 

 need legrass. 



green. See needlegrass, green. 

 long-avraed. See needle-and- thread. 

 robust. See sleepygrass. 

 small mountain. See needlegrass, subalpine 

 southwestern. See needlegrass, California. 

 western. See needlegrass, western, 

 potato 



Indian-. See yampa. 

 prairie. See breadroot, Indian. 

 Potentilla (cinquefoil), W155. 

 argen tea (silver c.) , W155. 

 biennis (biennial c.), W1B5. 

 breweri (Brewer c.), W165. 

 canadensis (oldfleldc.), W155. 

 Wipes (slimstem c.), W16B. 

 fruticosa. See Dasiphora fruticosa. 

 glaucophylla (blueleaf cinquefoil), W15B 

 nuttaHii (Nuttall c.), W15C. 

 reptans (creeping c.), W155. 

 tenuifolia. See Dasiphora fruticosa tenuifolia. 

 tormentilla (tormentilla), W166. 

 poverty grass. See three-awn. 



Texas. See three-awn, poverty. 

 prairie-bean. See goldenpea, mountain, 

 prairlefennel. See biscuitroot. 

 pricklypear (Opuntia, flat-stemmed spp.) 



Engclmann (O. engelmanni), BlOti. 

 proso (Panicummiliaceum), G89. 

 Prosopis (mesquite), BUS. 



glandulosa (honey m.), B112. 

 juliflora (common m.). B112. 

 juliflora glandulosa. See P. glandulosa. 

 odorata. See Strombocarpa odorata. 

 pubescens. See Strombocarpa odorata. 

 velutina (velvet mesquite), J3//#. 

 Prunus (cherry; chokecherry; plum) 



demissa (western chokecherry), B114. 

 cmarginata (bitter cherry), B115. 

 melanocarpa (black chokecherry), B114. 

 virginiana (common c.),B114. 

 Psoralea (scurfpea; breadroot). W157. 

 argophylla (silverleaf scurfpea), W157. 

 castorea (Beaverdam breadroot) , W167. 

 corylifolia (Malay- tea), W167. 

 cnspidata (tall breadroot), W1B7. 

 esculenta (Indian b.), W157. 

 hypogaea (little b.), W167. 

 macrostachya (leatherroot), W167. 

 mcphitica (skunktop breadroot), W157, 

 physodes (California-tea), W167. 

 tenuiflora (slender scurfpea), W1B7. 

 Psoralidium. See Psoralea. 

 Pteridium, W1B8. 



aquilinum (bracken), W158. 

 aquilinum pubescens (western b.), W158. 

 Pteris'O (brake), W1B8. 



"aquilina" (of western authors). See Pteri- 



diutn aquilinum pubescens. 

 aquilina lanuginosa. See Pteridium aquilinum 



pubescens. 

 Pnlsatilla (pasqueflower) 



hirsutissima. See P. ludoviciana. 

 ludoviciana (American pasqueflower), W159. 

 occidentalis (western p.), W169. 

 patens. See P. ludoviciana. 

 vulgaris (European pasqueflower), W169. 

 Purshia (bitterbrush) 



glandulosa (desert b.), B116. 

 , tridentata (bitterbrush), B116. 

 pussy toes (Antennaria), W16. 

 raceme (A. racemosa), W16. 

 rose (A. rosea), W16. 

 showy (A. pulcherrima) , W16. 

 Pyrrocoma. See Aplopappus. 

 quackgrass (Agropyron repens), Ol. 

 quakerbonnet. See lupine. 

 Quamasia (camas), Wl 60. 

 cusickii (Cusickc.), W160. 

 esculenta [Kaf., not (Ker) Coville]. See Q, 



quamash. 



leichtlinii (Leichtlin camas), W160. 

 quamash (common c.), \V160. 

 suksdorfli (Suksdorf c.), W160. 

 Queen-Annes-lace. See yampa. 

 Quercus (oak), B117. 

 alba (white o.), B117. 

 arizonica (Arizona white o.), Bin. 



Quercus (oak), B117 Continued, 

 breweri. See Q. oerstediana. 

 califoruica. See Q. kelloggii. 

 chrysolepis (canyon live oak). B117 

 dumosa (California shrub o.), B117 

 dumosa turbiuella. See Q. turbineila. 

 emoryi (Emory oak), B117 

 gambelii (Gambelo.). B121. 

 garryana (Garry o.), B117. 

 garryana breweri. See Q. oerstediana. 

 grisea (gray oak), J3117. 

 keiloggii (California black o.), B123 

 lobata (California white o.), B117. 

 novomexicana (New Mexican o.) Blgl 

 oerstediana (Brewer o.), B117 

 turbineila (shrub live o.), B125 

 utahensis (Utaho.), Blgl. 

 vaccini folia (huckleberry o.), B117. 

 virginiana (live o.), Bin. 

 vreelandii (Vreeland o.), B121 

 Qumey grass. See ricegrass, Indian. 

 quinine-brush. See bitterbrush. 

 quinine-bush. See cliffrose; silktassel, Wricht- 



tassel tree, 

 rabbitbrush (Chrysothamnus), B54. 



Bloomer (Aplopappus bloomeri), BIS. 

 Greene (C. greenei), BB.',. 

 Howard (C. howardi), B54. 

 Nevada (C. nevadensis), B$4 

 Parry (C. parryi), B54. 

 rubber (C. nauseosus). B56. 

 small (C. stenophyllus), B64. 

 tall (C. speciosus), B54. 

 twistleaf (C. yiscidiflorus tortifolius), B5L 

 rabbitbrush. See jimmy weed; rabbitbrush. rubber 

 rabbitsage. See rabbitbrush. 

 ragged-breeches. See waterleaf, ballhead. 

 ragwort (Senecio jacobaea), W168. 

 giant. See ragwort. 

 tansy. See ragwort. 

 Ranunculus (buttercup), W161. 

 acris (tall b.), W161. 

 alismaefolius (plantainleaf b.), W161 

 alismellus, W161. 

 aquatilis (water b.), W161. 

 asiaticus (Persian b.), W161. 

 bongardi (Bongard b.), W161. 

 calthaeflorus. See R. alismaefolius. 

 cymbalaria (ivy buttercup), W161. 

 flammula (lesser spear wort), W161. 

 flammula reptans (creeping s.), W161. 

 glaberrimus (sagebrush buttercup), W161. 

 macaulcyi (Macauley b.), W161. 

 maximus (great b.), W161. 

 occidentalis (western b.), W161. 

 sccleratus (rogue b.), W161. 

 raspberry, whiteflowering. See thimbleberry. 

 ratany (Krameria) 



iittleleaf (K. parvifolia), B88. 

 range (K. glandulosa), B88. 

 white (K.grayi).jBSS. 

 rattleweed. See crazyweed. 

 ray-flower. See actinea, stemless. 

 rayless-goldenrod. See goldenweed; jimmyweed; 



rabbitbrush. 



red-and-yellow-pea (Lotus wrightii), Will, 

 redberry. See buffaloberry, silver. 

 redhead Louisa. See bitterroot. 

 redheart (Ceanothusspinosus), BS9. 

 redroot (Ceanothusamericanus), BS9. 

 redroot. See eriogonum, James, 

 red top (Agrostis, G8; A. alba, G9). 

 alpine (A. rossae), G8. 

 alpine winter (A. hiemalisgeminata), Gil. 

 Idaho (A. idahoensis), G8. 

 leafy (A. diegoensis), O8. 

 purple. See spike redtop. 

 pygmy (A. humilis), G8. 

 Ross. See alpine redtop. 

 spike (A. exarata), G10. 

 western. See spike redtop. 

 winter (A. hiemalis), Gil. 

 reedgrass (Calamagrostis), G40. 

 bluejoint. See bluejoint. 

 Brewer. See shorthair reedgrass. 

 Canadian. See bluejoint. 

 marsh (C. inexpansa), G40. 

 Pacific (C. nutkaensis), Glfl. 



Old World genus. American species are preferably placed in the genus Pteridium. 



