348 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
AMYGDALACEAE. AtmMonp FaAmMILy. 
Flowers perfect; carpel solitary ..........-.....-.-2..- wee eee ee eee eee Prunvs. 
Flowers dioecious; carpels five ........-. 2.222222 22 eee OsMARONIA., 
PRUNUS. 
Flowers racemose; fruit dark purple -.......... 2-22.22... Lee eeeee 1. P. demissa. 
Flowers corymbose; fruit bright red ......-. 2222222222222 2 ee eee 2. P. emarginata. 
1. Prunus demissa (Nutt.) Dietrich, Syn. Pl. 3: 43. 1843. CHOKECHERRY. 
Cerasus demissa Nutt.; Torr. & Gr. Fl. 1: 4112 1840. 
Tyre Loca.ity: “ Plains of the Oregon toward the sea and mouth of the Wahlamet.”’ 
Rance: Oregon, Washington, and Idaho. Perhaps also farther eastward. 
SPECIMENS EXAMINED: Whidby Island, Gardner 100; Wenache, Whited 117, 1071; 
Yelm Prairie, Piper 1120; North Yakima, Mrs. Steinweg in 1894; Sunnyside, Cotton 371: 
Rock Lake, Sandberg & Leiberg 104; upper Columbia, Lyall; Lake Chelan, Lake & Hull 
in August, 1892; without locality, Vasey in 1889; Spokane Valley, Watson 97; Pullman, 
Piper 1530, August, 1896; Wawawai, Lake, May, 1892; Blue Mountains, Piper, August, 1896. 
ZONAL DISTRIBUTION: Arid Transition and Upper Sonoran. 
Two forms or perhaps distinct species occur in eastern Washington, one with densely 
flowered stiff racemes blooming 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 emarginata (Dougl.) Walp. Rep. 2: 9. 1843. WILD CHERRY. 
Cerasus emarginata Dougl.; Hook. Fl. Bor. Am. 1: 169. 1830. 
Type Locaity: “On the upper part of the Columbia River, especially about the Kettle 
Falls.’’ Collected by Douglas. 
Rance: British Columbia to Idaho and California. 
SPECIMENS EXAMINED: Klickitat River, W/ett 18327; Wenache Mountains, Whited 1005; 
Peshastin, Sandberg & Leiherg 590; White Bluff, Lake & Hull, August, 1892; Fllensburg, 
Piper, May, 1897; without locality, Vasey in 1889; Blue Mountains, Lake &: Hull, July, 
- 1892; Piper, August, 1896; Mount Carlton, Kreager 245. 
ZONAL DisTRIBUTION: Arid Transition. 
2a. Prunus emarginata villosa Sudw. U.S. Dept. Agr. Div. Forest. Bull. 14: 240. 1897. 
Cerasus mollis Doug].; Hook. Fl. Bor. Am. 1: 169. 1830, not Torr. 1824. 
Prunus mollis Walp. Repert. 2: 9. 1843. 
Prunus emarginata mollis Brewer in Brewer and Wats. Bot. Cal. 1: 167. 1876. 
Type Locatity: “Northwest coast of America, near the mouth of the Columbia, and on 
subalpine hills, near the sources of that river.” Collected by Douglas. 
Rance: British Columbia to Oregon and Idaho. 
SPECIMENS EXAMINED: Clallam County, //mer 2525; Montesano, Heller 4036: Port Lud- 
low, Binns; Tacoma, Flett 56; Admiralty Head, Piper, May, 1898; upper Nisqually Valley, 
Allen 120; Cascade Mountains, latitude 49°, Lyall; Lake Chelan, Lake & Hull 513. 
ZONAL DISTRIBUTION: Humid Transition. 
OSMARONIA. 
1. Osmaronia cerasiformis (Torr. & Gr.) Greene, Pittonia 2: 191. 1891. INDIAN PLUM. 
Nuttallia cerasiformis Torr. & Gr.; Hook & Arn. Bot. Beech. Voy. 337. pl. 82, 1841. 
Type Locauity: “On the Columbia.”’ Collected by Nuttall, by Douglas, and by Scouler. 
Rance: British Columbia to California in the coast region. 
SPECIMENS EXAMINED: Montesano, eller 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, E/mer 2511. 
