PIPER—FLORA OF THE STATB OF WASHINGTON. 291 
SPECIMENS EXAMINED: Hoquiam, Lamb 1026; Clallam County, Elmer 2692; Whidby 
Island, Gardner 24; Seattle, Piper 546; Tacoma, Flett 76; San Juan Island, Lyall in 1858; 
Goat Mountains, Allen, August 23, 1895; without locality, Cooper. 
ZONAL DistRiBUTION: Humid Transition. 
The following specimens seem to me ambiguous between C. oligosperma and C. pennsyl- 
vanica and I am unable to refer them elsewhere: Seattle, Piper 732; Tacoma, Flett, April 
20, 1896; west Klickitat County, Suksdorf 505, 504; Skokomish River, Piper 2182; Hin- 
caid; Pend Oreille River, Lyall in 1861; Waitsburg, Horner 588, 79; Wawawai, Elmer. 
PARRYA. 
1. Parrya menziesii (Hook.) Greene, Ii. Fran. 253. 1891. 
Phoenicaulis menziesii Greene, Bull. Torr. Club. 18: 148. 1886. 
Hesperis menziesti Hook. Fl. Bor. Am. 1:60. 1830. 
Phoenicaulis cheiranthoides Nutt.; Torr. & Gr. Fl. 1:89. 1838. 
Type Locaity: California. Collected by Menzies. 
Rance: Washington to California and Nevada. 
SPECIMENS EXAMINED: Ellensburg, Piper 2712; Kittitas Valley, Whited 68; Blue 
Mountains, Piper 2414. 
ZONAL DISTRIBUTION: Arid Transition. 
la. Parrya menziesii lanuginosa 5. Wats. in Gray, Syn. FI. 11: 152. 1895. 
Type Locauity: “Lower Columbia Valley, east of the Cascades, Douglas, Suksdorf.”’ 
Rance: Washington to California. 
SPECIMENS EXAMINED: Columbia River, Douglas in 1830; between Klickitat Valley and 
Columbia River, Suksdorf 236; east side Columbia below the Chelan, Watson 28; near Gol- 
dendale, Howell 43; Wenache, Whited 1019; North Yakima, Mrs. Steinweg in 1894; Crab 
Creek, Sandberg & Leiberg 242; without locality, Vasey in 1889; Klickitat Hills, Gorman, 
April, 1895; Rattlesnake Mountains, Cotton 551. 
ZONAL DistRIBUTION: Arid Transition. 
ARABIS. Rock cress. 
Seeds wingless; flowers white. 
Radical leaves pinnately cleft into short and broad segments.. 1. A. lyrata occidentalis. 
Radical leaves entire. 
Cauline leaves not auriculate. 
Herbage wholly stellate-pubescent..........-..-.- 2. A. whitedii. 
Herbage glabrous above, pubescent below with sim- 
ple or forked hairs... ..... 22-22. 2.22 20222206 3. A. nuttallii. 
Cauline leaves auriculate; plant glaucous, glabrous 
except near the base... .....-..--------------+--- 4. A. glabra. 
Seeds winged or wing-margined. 
Seeds arranged in a single row. 
Cauline leaves sessile not cordate or auricled. ..........- 5. A. furcata. 
Cauline leaves cordate or auriculate at base........... 6. A. hirsuta, 
Seeds more or less distinctly in two rows. 
Cauline leaves not at all auriculate at base; leaves all 
entire, villous-hirsute......2..2..-22.-2.--.-..-. ..--- 18. A. cusickii. 
Cauline leaves auriculate or cordate. 
Radical leaves dentate. 
Pods reflexed, usually straight; whole plant 
finely stellate-pubescent .......-.---.-.-.- 7. A. holboellit. 
Pods arcuate, spreading. 
Flowers dark-purple; basal leaves some- 
what pubescent, the upper glabrous and 
glaucous........2..2.-..--2-e ee ences 8. A. atrorubens. 
