348 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



AMYGDALACEAE. Almond Family. 



Flowers perfect ; carpel solitary Prunus. 



Flowers dioecious; carpels five Osmakonia. 



PRUNXTS. 



Flowers racemose : fniit dark purple 1. P. demissa. 



Flowers corj-mbose ; fruit bright red 2. P. eniarginata. 



1. Prunus demissa (Nutt.) Dietrich, Syn. PI. 3: 43. 1843. Chokecherry. 

 Cerasm demism Nutt.; Torr. &. Gr. Fl. 1: 411. 1840. 



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



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



SpEri.ME.\s E.\AMi.\Ei): Whidbv Island, Gardner 100; Wenache, Whited 117, 1071; 

 Yclm Prairie. Pijter 1120; North Yakima, J/rs. Steinweg in 1894; Sunnyside, Cotton 371; 

 Rock Lake, Sandherg d' I^iberg 104; upper Columbia, Lyall; Lake Chelan, Lake d' HvU 

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

 Piper 1530, August , 189G: Wawawni, iMke, May, 1892; Blue Mountains, Piper, August, 1896. 



Zonal dkstribitiox: 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 arlwresccnt , and tends to have broader leaves. 



2. Pninus emarginata (Dougl.) Walp. Rep. 2: 9. 1843. Wild cherry. 

 Cerafnts emarginata Dougl.; Hook. Fl. Bor. Am. 1: 169. 1830. 



Ti-pE ix)cality: "On the upper part of the Columbia River, especially about the Kettle 

 Falls." Colk»cted by Douglas. 



Range: Britisli Columbia to Idaho and C-alifomia. 



Speckmens e.xamineu: Klickitat River, Flett 1327; Wenache Mountains, Whited 1005; 

 Pcshastin, Sandherg <& Leiherg 590; White BlufT, Lake <& Hull, August, 1892; FUensburg, 

 Pi])er, May, 1897; without locality, Vasey in 1889- Blue Mountains, Lake cfe Hull, July, 

 1892; Piper, August, 1896; Mount Carlton, Kreager 245. 



Zonal distribution: Arid Transition. 



2a. Prunus emargi-iata villosa Sudvv. U.S. Dept. Agr. Div. Forest. Bull. 14: 240. 1897. 



Cerasus mollis Dougl.; Hook. Fl. Bor. Am. 1: 169. 1&30, not Torr. 1824. 



Prunus mollis Walp. Repert. 2: 9. 1843. 



Prunus emarginata mollis Brewer in Brewer and Wats. Bot. Cal. 1 : 167. 1876. 



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

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



Range: British Columbia to Oregon and Idaho. 



Specimens e.xamined: Clallam County, £7mer 2525; Montesano, /MZer 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. pi. 82, 1841. 



Ti'PE locality: "On the Columbia." Collected by Nuttall, by Douglas, and by Scouler. 



Range: British Columbia to California in the coast region. 



Specimens examined: Montesaflo, 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. 



