348 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



AMYGDALACEAE. Almond Family. 



Flowers perfect ; carpel solitar}- Prunus. 



Flowers dioecious ; carpels five Osmaronia. 



PRUNUS. 



Flowers racemose ; fruit dark purple 1. P. demissa. 



Flowers corymbose; fruit bright red 2. P. eniarginata. 



1. Prunus demissa (Xutt.) Dietrich, Syn. PL 3: 43. 1843. Chokecherry. 

 Cerasus demissa Nutt.; Torr. &. Gr. Fl. 1: 411. 1840. 



Type locality: "Plains of the Oregon toward the sea and mouth of the Wahlamet." 



Range: Oregon, Washington, and Idaho. Perhaps also farther eastward. 



Speclmexs examined: Whidby Island, Gardner 100; Wenache, Whited 117, 1071; 

 Yelm Prairie. Piper 1120; North Yakima, Mrs. Steimreg in 1894; Sunn^'side, Cotton 371; 

 Rock Lake, Sandberg & Leiherg 104; upper Columbia, Lyall; Lake Chelan, Lake d- Hull 

 in August, 1892; without locality, Fasej/ in 1889; Spokane Valley, Watson 97; Pullman, 

 Piper 1.530, August, 1S9G: Wawawai, Lake, May, 1892 ; Blue Mountains, Piper, August, 1896. 



Zonal distribution: Arid Transition and Upper vSonoran. 



Two forms or perhaps distinct species occur in eastern Washington, one with densely 

 flowered stiO" racemes l)looming about a week later than the other, which has looser, laxer 

 racemes. The former is often arborescent, and tends to have broader leaves. 



2. Prunus eniarginata (Dougl.) Walp. Rep. 2: 9. 1843. Wild cherry. 

 C, rasas emanjinata Dough; Hook. Fl. Bor, Am. 1: 169. 1830. 



Type locality: "On the upper part of the Columbia River, especially about the Kettle 

 Falls." Collected by Douglas. 



Range: British Columbia to Idaho and C'alifornia. 



Specimens examined: Klickitat River, Flett 1327; Wenache Mountains, Whited 100.5; 

 Peshastin, Sandberg c£' Leiherg 590; White BlufT, Lake & Hull, August, 1892; Fllensbtirg, 

 Piper, May, 1897; without locality, Vasey in 1889; Blue Mountains, Lake & Hull, Juh', 

 1892; Piper, August, 1896; Mount Carlton, Kreager 24.5. 



Zonal distribution: Arid Transition. 



2a. Prunus emargi-iata villosa Sudw. U. S. Dept. Agr. Div. Forest. Bull. 14: 240. 18^7. 



Cerasus mollis Doug!.; Hook. Fl. Bor. Am. 1: 169. 18.30, not Torr. 1824. 



Prunus »(oZ/ii's Walp. Repert. 2: 9. 1843. 



Pninus ernarginaia mollis Brewer in Brewer and Wats. Bot. Cal. 1: 167. 1876. 



Type lcjcality: "Northwest coast of America, near the mouth of tlie Columbia, and on 

 subalpine hills, near the sources of that river."' Collected by Douglas. 



Range: British Columbia to Oregon and Idaho. 



Specimens examined: Clallam County, AYmer 2.52.5; Montesano, //eWer 4036 ; Port Lud- 

 low, Binns; TeLComa, Flett .56; Admiralty Head, PJper, May, 1898; upper Nisqually Valley, 

 Allen 120; Cascade Mountains, latitude 49°, Lgall: Lake Chelan, Lake d' Hull 513. 



Zonal distribution: Humid Transition. 



OSMARONIA. 



1. Osmaronia cerasifomiis (Torr. &Gr.) Greene, Pittoniii 2: 191. 1891. Indian plum. 



Nuttallia cerasiformis Torr. & Gr.; Hook & Arn. Bot. Beech. Voy. 337. pi. 8£, 1841. 



Type locality: "On the Columbia." Collected by Nuttall, by Douglas, and by Scouler. 



Range: British Columbia to California in the coast region. 



Specimens examined: Montesano, Heller 3874; Admiralty Head, Piper, March, 1898; 

 Seattle, Piper 61; upper Nisqually Valley, Allen .59; west Klickitat County, Suksdorf 13; 

 Maxfield, Henderson, April, June, 1892; Clallam County, Elmer 2511. 



