PIPER FLORA OP THE STATE OF WASHINGTON. 



43 



black pine ( Finns confoi'td) disinites the ground with the red fir. 

 Until the middle of July these prairies are carpeted with flower,-; 

 (PI. X). After this time they present a distinctly arid appearance. 

 The flora consists of a considerable number of species which, so 

 far as Washington and Oregon are concerned, do not occur else- 

 where, though most of them range into California. Among tliem 

 are the follow i no-: 



ArciHirid truclht. 

 LUMjvciithcoit Idtifoliiim. 

 Enjiltnuihuii i/inaiilcioii. 

 Gilia tciK'lla. 

 Godcthi (iiiKJCiHi. 

 Godctiu iiKiiihinilDcra. 

 Grinddia iiitcurifoliii. 

 Honlzonvlla dm audi. 

 Hookcru voronuta. 

 Ilookcra piilchcUa. 

 Hosuckia (/idciUs. 

 Iris tciia.r. 



Lo))i(itiiiiii iitriciildtKDi. 

 L II pill II -s' (/ Ihiciiiil is. 



Lupin IIS lepidiis. 

 Microscris laciii iata. 

 Ortliorurpiis iittiiiiiatiis. 

 I'latiistif/uia orri/iniiini. 

 Raiiiniciiliis orthorhynchus. 

 Seiiccio fastigiata. 

 Sericocarpus rigid us. 

 Solidago tolmicana. 

 ^yvthgris rot uiidi folia. 

 Trifoliinii liallii. 

 TrifoHiiiii tridcutatuin. 

 VaJcriuiKila congest a. 

 Viola Jioinllii. 



A much hirger number of species, however, recur in the Arid 

 Transition area east of the Cascade Mountains. Nearly all of these 

 species are limited to the Pacific coast, ranging from California 

 northward to British Cohnnbia on both sides of the Cascade Moun- 

 tains. Here, as in the case of tlie Up}Hn' Sonoran species of Califor- 

 nia origin, there is good reason to lielieve that most of the species 

 reached the Columbia P>asin through the Khunath Gap. Character- 

 istic examples are the following: 



Agoscris hctcropji ijtla. 

 AlchcmiUa orcidriitiitis. 

 Alsine nitens. 

 Antennaria lioircllii. 

 Athysaniis piisiilus. 

 Balsamorh iza balsa niorh iza. 

 Balsamorhiza dcJtoidca. 

 Boisduvalia strict a. 

 Caruin gairdiicri. 

 CaucaUs in icrociirpa. 

 Ceanntlius sanguineus. 

 Collinsia grand iflora. 

 Crocidiii )ii in u 1 1 ica ii Ic. 

 Erioccph alum la n a turn. 

 Erigcron sprcios us. 

 Gilia capita fa. 

 Gilia gracilis. 

 Githopsls speciilarioidcs. 

 Hctcrocodon rariflorum. 

 Hcuclicra cijliiuJricu. 

 Hieracium scolder i. 



Ilonkera. li yacintJi ina. 

 Eosackia dec u in 1)cns. 

 Loinatiiiiii iiiiilicaiilc. 

 Luinatiuiii triteriiatuni. 

 Mlcra III ltd is orega iia. 

 Nararretia iiitertcita. 

 Pcctocari/d pciiicilldta. 

 Pill us ponderosa. 

 Pole nion ill III iiiicrantlnnii. 

 Pruiius deiiiissa. 

 Psilocarpli us elatior. 

 Q lie re us garryxi ii a . 

 Seduiu douglasil. 

 Sid a Icea cainpestris. 

 Silcnc inenziesii. 

 tSisi/rincJi ivm grand! fl or uiii. 

 TelUiiia parvifiora. 

 Tliysanocarpus curripes. 

 Toiiella colliiisioides. 

 Zygadeniis vcncnosus. 



