umbellifer^e. (parsley family.) 115 



Var. Hookeri, Torr. & Gray. Ehachis narrow: fruit scabrous. — Loc. cit. 

 M. trachyspermum, Nutt. From the Saskatchewan to the Upper Missouri, the 

 Platte, and S. W. Montana. 



2. M. temiifolium, Nutt. Acaulescent, erect and somewhat cespitose, of 

 glaucous hue : leaves tripinnately divided ; segments linear : flowers white : fruit 

 nearly glabrous ; oil-tubes with a more aromatic oil than in the former species. 

 — Loc. cit. " Rocky Mountains," Nuttall. 



3. OEOGtEITIA, Watson. 



Calyx-teeth minute. Commissure with 2 to 4 oil-tubes : carpophore adnate 

 to the carpels and forming » thick corky midrib dividing the hollowed face 

 of the commissure longitudinally. — Dwarf, scarcely caulescent, glabrous : 

 root tuberous : leaves radical, 1 to 2-ternate, with entire linear segments : 

 umbel with few very short unequal rays. 



1. O. linearifolia, Watson. Stem an inch or two above ground and 

 very slender : leaves 2 or 3, upon filiform petioles, equalling the stem : umbels 

 with 2 or 3 rays ; umbellets 3 to 5-flowered : involucre none ; involucels of 

 1 to 3 linear leaflets exceeding the rays. — Bot. King's Exp. 120, pi. 14. 

 Wasatch Mountains, on damp shaded ridges. 



4. CABUM, L. 



Calyx-teeth small. Stylopodium conical. — Smooth, erect, slender biennial 

 herbs or acaulescent, with tuberous or fusiform fascicled roots : leaves mostly 

 simply pinnate with a few leaflets. 



1. C. Gairdneri, Benth. & Hook. Stem I to 4 feet high, from a tuberous 

 root: leaves few, with 3 to 7 linear entire leaflets; the lower leaves rarely pin- 

 nate with entire or toothed divisions ; upper leaves usually simple : involucre 

 of a single linear leaflet, or often wanting ; involucels of several linear bracts : 

 flowers white. — From Washington through Idaho to Wyoming, and thence 

 to S. California. A common article of food among the Indians, who call it 

 " yamp." 



2. C. ( ■? ) Hallii, Watson. Acaulescent from a stout caudex branching at 

 the summit : leaves pinnate or pinnatisect ; leaflets or segments oblong or sub- 

 ovate in outline, pinnately 3 to 7-lobed and few toothed : scape very simple, naked, 

 surpassing the leaves, 10 inches high: involucel deeply parted: flowers yel- 

 low. — Bibl. Index, i. 416. Seseli Hallii, Gray. Miisenium Greenei, Gray. 

 Colorado. 



5. BEEULA, Koch. 



Calyx-teeth minute. Stylopodium conical and styles short. Commissure 

 broad. Seed terete. — A smooth perennial aquatic : leaves pinnate : involucre 

 and involucels of several leaflets. 



1. B. angustifolia, Koch. Erect, J to 3 feet high, the stem stout and 

 angled : leaflets about 6 pairs, ovate-oblong to linear, often laciniately lobed at 

 base and the upper ones especially more or less deeply cut-toothed : involucre 

 and involucels of 6 to 8 entire linear-lanceolate leaflets. — Slum angustifolium, 

 L. From Colorado northward, and eastward across the continent ; also in 

 California. 



