PIPER—FLORA OF THE STATE OF WASHINGTON, 287 
ALYSSUM. 
1. Alyssum alyssoides (Iu.) Gouan, Hort. Monsp. 321. 1762. 
Clypeola alyssoides L. Sp. Pl. 2: 652. 1753. 
Alyssum calyeinum L. Sp. Pl. ed. 2. 2: 908. 1763. 
Type Locatity: ‘Habitat in Austria, Gallia.” 
SPECIMENS EXAMINED: Seattle, Piper in 1885; Pullman, Piper. 
DRABA. 
Annuals. 
Flowers white. 
Petals deeply 2-cleft...........-2.-2.-.---.-.-.-.. 1. D. verna. 
Petals entire; pods hispid... ....-.-.------------- 2. D. caroliniana micrantha. 
Flowers yellow. 
Pods 6 to 8 mm. long, much shorter than pedicels. _ 3. D. nemorosa. 
Pods 8 to 15 mm. long, about equaling the pedicels .. 4. D. stenuloba. 
Perennials. 
Midrib of leaves becoming prominent. 
Flowers yellow; pods acute... .....2....2.-.- .... 5. D glacialis. 
Flowers white; pods acuminate................... 6. D. douglasii. 
Midrib of leaves not prominent. 
Stems scapose; flowers white. .......-.2.-.------. 7. D. lonchocarpa. 
Stems very leafy; flowers yellow.........-.-.----. &. D. aureola. 
1. Draba verna L. Sp. PI. 2: 642. 1753. 
Type LocaLity: Europe. 
SPECIMENS EXAMINED: Vancouver, Suksdorf 499; 7. 2. Wilcor, March, 1883; Walla 
Walla, Leckenby, April, 1898; Waitsburg, Horner 606. 
2. Draba caroliniana micrantha (Nutt.) A. Gray, Man. ed. 5. 72. 1867. 
Draba micrantha Nutt.; Torr. & Gr. Fl. 1: 109. 1888. 
Type Locauity: ‘Open plains and rocky places about St. Louis, and in Arkansas.” 
RanGeE: Washington to Illinois, Texas, and New Mexico. 
SPECIMENS EXAMINED: North Yakima, Henderson, May, 1892; Spokane, Piper, May, 
1897; Waitsburg, Horner 74; Wawawai, Piper 2801. 
ZONAL DIsTRIBUTION: Arid Transition and Upper Sonoran. 
3. Draba nemorosa L. Sp. Pl. 2: 6438. 1753. 
Tyre Locaity: “Habitat in Sueciae nemoribus.” 
Rance: British Columbia to Colorado and the Great Lakes. Europe. Siberia. 
SPECIMENS EXAMINED: Whidby Island, Gardner 25; White Salmon, Suksdorf 232; Fort 
Colville, Lyall in 1861; Geyer 626; Hangman Creek, Sandberg & Leiberg 4; Pullman, Piper 
1794; Elmer 151; Almota, Piper, April, 1894; Waitsburg, Horner 608; Wawawai, Piper 
2800. : 
ZONAL DISTRIBUTION: Upper Sonoran and Arid Transition. 
4. Draba stenoloba Ledeb. Fl. Ross, 1: 154. 1841. 
Type Locauity: “In ins. Unalaschka.”’ 
Rance: Alaska to Colorado and California. 
SPECIMENS EXAMINED: Olympic Mountains, Flett 102; Mount Baker, Flett 851; Klicki- 
tat River, Flett 1142 in part; Yakima County, Henderson 2385 B; Stevens Pass, Sandberg 
& Leiberg 758; Wenache Mountains, Elmer 434; Wenache Mountains, Cotton 1288. 
ZONAL DISTRIBUTION: Hudsonian. 
5. Draba glacialis Adams, Mem. Soc. Nat. Mosc. 5: 106. 1817. 
Type Locaity: ‘In promontorio Byskofskoymys,” near the mouth of the Lena River, 
Siberia. 
