4?() CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Taller plants, the roots elongate, hardly tuberous. | 
Peduncles stout, often much swollen at the summit. 
Fruit very large, 18 to 28 mm. long; leaf segments 
NarrOW.....-.-------- +2 eee ee eee 9. L. suksdorfit. 
Fruit smaller 8 to 14 mm. long. 
Leaf segments lanceolate... ..---.--------- 10. L. nudicaule, 
Leaf segments ovate to orbicular....-..---- 11. L. platyphyllum, 
Peduncles less stout, never swollen at the top. 
Bractlets conspicuous. 
Flowers yellow; leaves glabrous... ...-.----- 12. L. utriculatum. 
Flowers white. 
Herbage tomentose. .-.-.------------ 13. L. macrocarpum. 
Herbage puberulent . ....-.----------- 14. L. artemisiarum. 
Bractlets small or wanting. 
Fruit linear; flowers long-pedicelled.......- - 15. L. ambiguum. 
Fruit oblong. 
Leaves pinnate. 
Oil tubes solitary in the intervals... 16. L. martindalei. 
Oil tubes 3 in each interval. ....-- - 17. L. halla. 
Leaves ternate. 
Wings of the fruit broad. 
Ill-scented, the leaves finely 
dissected... -..-..--------- 21. L. grayi. 
Not ill-scented, the leaves not 
finely dissected........-.--- 18. L. laevigatum. 
Wings of the fruit narrow. 
Ovaries glabrous. .....-...-.- 19. ZL. triternatum. 
Ovaries puberulent. 
‘ Leaf segments lanceolate, 
elongate, usually entire... 20. L. robustius. 
Leaf segments oblong, rather 
short, often toothed... ~~ - 22. L. brevifolium. 
1. Lomatium gormani (Howell) Coult. & Rose, Contr. Nat. Herb. 7: 208. 1900. 
Peucedanum gormani Howell, Fl. N. W. Am. 1: 252. 1898 (April 1). 
Peucedanum confusum Piper, Erythea 6: 29, 1898 (April 10. ) 
Typr Locauiry: On “high hills opposite The Dalles,’ Washington. Collected by 
Howell. 
Ranoe: Eastern Oregon, eastern Washington, and adjacent Idaho. 
SPECIMENS EXAMINED: Wenache Mountains, Whited 60; North Yakima, Mrs. Steinweg 
in 1894; Klickitat, Howell 411; Rock Creek, Sandberg & Leiberg 84; Pullman, Piper 1565; 
Elmer 73; Wawawai, Piper 1566; Coliax, Vasey, April 13, May 5, 1902; Waitsburg, Horner 
4; Spokane County, Leiberg 750; Klickitat Hills, Gorman, April, 1895. 
ZONAL pistriBuTION: Arid Transition. 
2. Lomatium geyeri (S. Wats.) Coult. & Rose, Contr. Nat. Herb. 7: 209. 1900. 
Peucedanum geyeri S. Wats. Proc. Am. Acad. 14: 293. 1879. 
Peucedanum evittatum Coult. & Rose, Bot. Gaz. 14: 277. 1889. 
Type Locauiry: ‘Sandy woods and plains, upper Columbia River; the biscuit-root of 
the Indians.” Collected by Geyer, no. 458, probably along the lower Spokane River. 
Rance: Eastern Washington and northern Idaho. 
SPECIMENS EXAMINED: Wenache, Whited 1007 and May 17, 1896; Badger Mountain, 
Whited, April 22, 1900; Roslyn, Whited, April 25, 1898; Ellensburg, Whited 270; Prper, 
May 20, 1897; Fort Colville, Lyall in 1861; Spokane, Piper 2300, 2941, 2697; Henderson 
2502; Hangman Creek, Sandberg & Leiberg 7; Ellensburg, Vasey in 1889. 
ZONAL DISTRIBUTION: Arid Transition and Upper Sonoran. 
