PIPER FLORA OF THE STATE OF WASHIN^GTON. 347 



3. Crataegus brevispina (Dougl.) Heller, Cat. N. A. PI. ed. 2. 98. 1900. 



Crataegus douglasii Lindl. Bot. Reg. 21: pi. 1810. 1835. 



Crataegus punctata brevispirm Dougl.; Hook. Y\. Bor. Am. 1: 201. 1833. 



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

 Collected by Douglas and by Scouler. 



Range: British Columbia to California and Nevada. 



Specimens examined: Seattle, Piper; Peshastin, Sandherg & Leiberg 544; Wenache, 

 Whited 1292, 1070, 89; E\\enshuTg,Whited34S; Glendsih, La1cec& Hull BOi; without locahty 

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

 3826. 



Zonal distribution: Arid Transition. 



The specimens from western Washington are somewhat different from those of eastern 

 Washington and possibly distinct. 



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

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

 to distinguish it. 



PYRTJS. 



Leaves simple ; fruit oblong 1 . P. diversifolia. 



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. Mem. Acad. St. Petersb. VL 2: 133. 1832. Crabappi^. 

 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 2rA0; Cascade Mountains, latitude 49°, 

 Lyall; Admiralty Head, Piper, May, 1898; Steilacoom, G. C. Woolson; Nisqually Valley, 

 AUen 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 Roem. Syn. Mon. 3: 139. 1847. 



Type locality: Sitka." 



Range: Alaska to California and Idaho. 



Specimens examined: Lake Cushman, Piper 1989; Twisp River, Whited, July 19, 1896; 

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

 tains, latitude 49°, Lyall in 1859; Klickitat River, Fleit 1341; Nason Creek, Sandherg cfc 

 Leiberg 683; near Lake Chelan, Lalce cfc Hull; Blue Mountains, Piper 2420; Mount Carlton, 

 Kreager 265; without locality, Vasey in 1889; Stehekin, Griffiths cfc Cotton 204. 



Zonal distribution: Canadian and Hudsonian. 



Referred to Pyrus arnericana DC. in Cooper's Report. It is also the Sorbus sambud- 

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

 cerned, but it is quite different from the real Pyrus sambucifolius Cham. & 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, Lamb 1365, 1365a; Mount Rainier, Piper 19S8,Flett 277; Goat 

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

 County, Suksdorf, August 13, 1886; near Skagit Pass, LaZ:e cfc Hull, August, 1892; Stam- 

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

 Elmer 663; without locality, Vasey in 1889. 



Zonal distribution: Hudsonian. 



