COULTER AND ROSE—-NORTH AMERICAN UMBELLIFERAE. 197 
First species cited, Leptotueniu dissecta Nutt. 
A genus of I1 species, belonging to western United States and 
British Columbia. 
For a critical discussion of this genus in relation to its allies, see our Revision N, 
Am. Umbell. 50. 
Foliage puberulent. 
Fruit sessile or nearly so; staminate flowers on slender pedicels, 
Wlowers purple .......2..-2---2-2.-.0-22-22-2-2---------- 2222 1. L. dissecta, 
Flowers yellow ....-..2..-.22..-...22222..-....--...------.----. 2. LL. foliosa, 
Fruit with pedicels longer than those of the staminate flowers. 
Fruit usually 8 to 12 mim. long; leaves finely dissected 2.2.22... 3. L. multifida. 
Fruit larger; foliage less dissected ......222222.2222.2-2----2------- 4. L. eatoni. 
Foliage glabrous. 
Leaves finely dissected. 
Involucels conspicuous and more or less united. 
Bractlets obovate, toothed near apex.......222.22----------- 5. DL. anomala. 
Bractlets lanceolate, entire. .................----------2------ 6. DL. humilis. 
Involucels neither conspicuous nor united, 
Fruit broadly oblong (10 to 12 mm, broad); lateral wings prominent and 
thick; oil tubes conspicuous, 3 in the intervals; leaflets filiform. 
7. L. purpurea. 
Fruit narrowly oblong (4 to 6 mm. broad) or short-oblong; lateral wings not 
prominent; oil tubes inconspicuous, mostly solitary in the intervals or 
wanting; leaflets shorter. 
Fruit short-oblong; peduncles slender, 
Leaflets rigid, pungent; flowers purple; Washington . 2.22. 8. LL. watsoni. 
Leaflets thin, not rigid. 
Flowers salmon color; pedicels long .........2..--- 9. L. sulmoniflora. 
Flowers deep yellow; pedicels short ...........2.-2---- 10. L. leibergii. 
Fruit narrowly oblong; peduncles enlarged andturgid . 2.2... 11. L. minor. 
Leaflets broad .........-2...--------------------------------- 12. L. californica. 
1. Leptotaenia dissecta Nutt. in Torr. & Gray, Fl. 1: 630. 1840. 
Ferula dissecta Gray, Proc. Am. Acad. 7: 348. 1868. 
Ferula dissoluta Watson, Bot. Calif. 1: 271. 1876. 
About 3 to 9 dm. high, leafy at base: leaves broad, 8 dm. or so long, 
ternate and thrice pinnate: segments ovate or oblong, 1 to 2.5 em. 
long, pinnatifidly laciniate-lobed and toothed, puberulent on the veins 
(beneath) and margins; umbel 8 to 20-rayed, with an involucre of few 
linear bracts and involucels of several linear bractlets; rays 5 to 13 
cm. long; flowers purple; sterile flowers pedicelled; fruit sessile or 
nearly so, 10 to 18 mm. long, about 6 mm. broad; strengthening cells 
in the distinct filiform dorsal and intermediate ribs, as well as in the 
laterals; seed face plane. 
Type locality, ** plains of the Oregon |Columbia| near the confluence 
of the Wahlamet;” collected by Vu¢tal/; type in Herb. Philad. Acad. 
From northern California to Vancouver Island. 
Specimens examined : 
CALIFORNIA: Sisson, Siskiyou County, Brown, in 1897, 
OreGon: Edge of prairies, Llowell, July, 1880. 
5872 14 
