PIPER FLOKA OF THE STATE OF WASHINGTON. 347 



3. Crataegus brevispina (Dougl.) Ik'ller, Cat. N. A. PI. od. 2. G8. 1000. 



Crataegus doiiglasii Lindl. Bot. Reg. 21: pJ. 1810. 1835. 



Crataegus punctata breinspina Dougl.; Hook. Fl. Bor. Am. 1: 201. 1833. 



Type locality: "Common on banks of streams on tlie north-west coast of America."' 

 Collected by Douglas and by Scouler. 



E,.4NGE: British Columbia to California and Nevada. 



Specimens ex.-^mined: Seattle, Pijyer; Peshastin, Sawlherg cfc Leiberg 544; Wenache, 

 Whited 1292, 1070,89; Ellensburg, FAi<e(7 348; GlentMo, LaJce de Hull 50-i; without locality 

 Vasey in 1889 ; Spokane, Kreager 534 ; Puyallup, Piper, Way 29, 1902 ; Pullman, Piper 3827, 

 3826. 



ZoN.\L distribution: Arid Transition. 



The specimens from westeiTi Washington are somewhat ditTereiit from tliose of easteiTi 

 Washington and possibly distinct. 



Near Pullman and Spokane occurs a form whose fniit is first chestnut-colored, later turn- 

 ing black. This blooms a little later than the ordinaiy form, but has no definite cliaracters 

 to distinguish it. 



PYRUS. 



Leaves simple ; fruit oblong 1 . P. direr.sifolia. 



Leaves pinnate; fruit globose. 



Fruit coral-red; leaflets shining, serrate from near the base 2. P. sitchensis. 



Fruit purple, glaucous; leaflets dull, serrate near the apex _,. . 3. P. occidentalis. 



1. Pyrus diversifolia Bong. :\lem. Acad. St. Peterslx VI. 2: 133. 1832. Crabapple. 

 Pyrus rivularis Dougl.; Hook. Fl. Bor. Am. 1: 203. 1834. 



Type locality: Sitka. 



Range: Alaska to California in the coast region. 



Specimens examined: Clallam County, Elmer 2510; Cascade Mountains, latitude 49°, 

 Lyall; Admiralty Head, Piper, May, 1898; Steilacoom, G. C. Woolson; Nis(|ually Valley, 

 Allen 213; Manor, Piper, July 14, 1899; without locality, Vasey in 1889. 



Zonal distribution; Humid Transition and Canadian. 



2. Pyrus sitchensis (Roem.) Piper, Mazama 2: 107. 1901. Mountain ash 

 Sorbus sitchensis Jioem. Syn. Mon. 3: 139. 1847. 



TiPE .locauty: Sitka. 



Range: Alaska to California and Idaho. 



Speclmens' examined; Lake Cushman, Piper 1989; Twisp River, Whited, July 19, 1896; 

 Easton, Whited 424; Mount Rainier, Piper 1990; Bear Prairie, Allen 291; Cascade Ivloun- 

 tains, latitude 49°, LyoZZ in 1859; Klickitat River, Fleft 1341; Nason Creek, Samlberg db 

 Leiberg 683; near Lake Chelan, Lalce d' Hull: Blue Mountains, Piper 2420; Mount Carlton, 

 Kreager 265; without locality, Vasey in 1889; Stehekin, Grifliths cl" Cotton 204. 



Zonal distribution; Canadian and Hudsonian. 



Referred to Pyrus americana DC. in Cooper's Report. It is also tlie Sorbus sambuci- 

 folius or Pyrus samhucifolius of various reports so far as Washington specimens are con- 

 cerned, but it is tjuite different from the real Pyrus sainhucifolbts Cham, ct Schlecht. 



3. Pyrus occidentalis S. Wats. Proc. Am. Acad. 23: 263. 1888. Mountain ash. 

 Sorbus occidentalis Greene, Fl. Fran. 54. 1891. 



Type locality; Cascade Mountains, latitude 49°. Collected by Lyall. 



Range: British Columbia to Oregon in the Cascade Mountains. 



Specimens examined: Clallam County, Elmer 2509; Cascade Mountains, latitude 49°, 

 .Lyall in 1859; Baldy Peak, Lamh 1365, 1365a; Mount Rainier, Piper 1988, Flett 277; Goat 

 Mountains, Allen 125; Mount Adams, Henderson, August, 1892; mountains, Skamania 

 County, Suksdorf, August 13, 1886; near Skagit Pass, Lale d- Hull, August, 1892; Stam- 

 pede Pass, Henderson, October, 1892; Stevens Pass, Sandberg d- Leiberg 750; Bridge Creek, 

 Elmer 663; without locality, Vasey in 1889. 



Zonal distribution; Hudsonian. 



