PIPER FLORA OF THE STATE OF WASHINGTON. 39 



Shrubs. 



Amelanchier utahensis. 

 Artemisia tridentata. 

 Artemisia tripartita. 

 Chrysothamnus nauseosiis. 

 Ericameria nana. 

 Er logon u m micro thecum. 

 ■ Eurotia lanata. 

 Orayia spinosa. 



Kunzia tridentata. 

 Ramona incana. 

 Rhus glabra occidentalis. 

 Rhus toxicodendron. 

 Rihes aureum. 

 Rihes cereum,. 

 Rarcohatus vermiculatus. 

 Tetradymia canescens. 



Herbs. 



Adenostegia capitata. 

 Artemisia dracunculoides. 

 Asclepias mexicana. 

 Atriplex canescens. 

 Bergia texana. 

 Carex douglasii. 

 Castilleja pallescens. 

 Chaenactis douglasii. 

 Chorisanthe watsoni. 

 Chrysopsis villosa. 

 Cleome lutea.- 

 Coldenia nuttallii. 

 Coleosanthus linifolius. 

 Comandra pallida. 

 Corispermum hyssopifolium. 

 Cryptanthe pterocarya. 

 Dondia depressa. 

 Erlgeron concinnus. 

 Erigeron divergens. 

 Euphorbia glyptosperma. 

 Oaertneria acanthicarpa. 

 Oaura parvi flora. 

 Oilia leptomeria. 

 Oilia parviflora. 

 Qilia pungens hookeri. 

 Hymenopappus tenuifolius. 

 Iva axillaris. 

 Iva xanthifolia. 

 Lactuca pulchella. 

 Lappula occidentalis. 

 Lupinus pusillus. 

 Mamillaria sp. 

 Mollugo verticillata. 

 Monolepis pusilla. 

 Nicotiana attenuata. 



Oreocarya leucophaea. 

 Orobanche ludoviciana. 

 Orogenia UncarifoUa. 

 Oxytheca dendroid ea. 

 Pentstemon acuminatus. 

 Pentstemon deustus. 

 Pentstemon gairdneri. 

 Pentstemon glaber. 

 Phaca inflexa. 

 Phacclia linearis. 

 Phlox longifolia. 

 Phragmites phragmites. 

 Piptocalyx circumscissa. 

 Psoralea lanceolata scabra. 

 Ptiloria paniculata. 

 Ptiloria tenuifolia. 

 Rumex venosus. 

 Schoenocrambe linifolia. 

 Sitanion hystrix. 

 ^olanum, triflorum. 

 Hphaeralcea munroana. 

 Sporobolus airoides. 

 Sporobolus asperifolius. 

 Sporoholus cryptandrus. 

 Strep tanthus long iros tris. 

 Stipa bloomeri. 

 Stipa comata. 

 Stipa occidentalis. 

 Stipa thurberiana. 

 Thelypodium integrifolium. 

 Thelypodium laciniatum. 

 Thelypodium nuttallii. 

 Trifolium megacephalum. 

 Zygadenus paniculatus. 



From the foregoing lists it is evident that the greater portion of 

 the Upper Sonoran flora in Washington is of Great Basin origin. 

 The comparatively small proportion of Californian species is prob- 

 ably due partly to the barriers through which few plants of this zone 



