266 UMBELLIFER^E. leibergia. 



GLYCOSMA. 



yellow flowers. • 



B. Americanum C. & R. Rev. Umb. 115. Radical leaves linear- 

 lanceolate, cauline ones very variable, oblong to linear, more or less clasp- 

 ing: rays unequal, 6-24 lines long, with involucre of 3-5 unequal bracts 

 and involucels of 5-8 rather small ovate bractlets: pedicels short: carpel 

 with prominent ribs, oil-tubes continuous about the seed-cavity and one 

 in each rib. Seed-face plane. Alaska to Yellowstone Park, perhaps 

 Washington. 



26 LEIBERGIA C. & R. Contr. Nat. Herb, iii, 675, t. xxvii. 



Slender glabrous acaulescent plants from a small globose root, 

 ternatety divided leaves and irregular umbels of white flowers. 

 Calyx-teeth obsolete. Fruit flattened laterally, linear, beaked, 

 glabrous: stylopodium wanting. Carpels only slightly flattened 

 dorsally, with 5 filiform ribs, the 2 lateral a little more promi- 

 nent and turned inward. Oil-tubes small, solitary in the inter- 

 vals, 2 on the commissure. Seed-face slightly concave but when 

 dry becoming more or less involute. 



L. orogenioides C. & R. I.e. Stem slender 6-23 inches high ; leaves 

 nearly as long as the flowering peduncle : leaflets linear, l>2-4 inches 

 long, entire or with a few teeth or linear lobes : rays of the umbel 3-10, 

 very slender, often spreading, 1-6 inches long; umbellets with few fl >wers 

 and fruits : involucre none ;involucels of few small bracts that are somewhat 

 united at base : fruit 4 lines long, flattened laterally but terete at base, 

 terete and somewhat beaked at apex. Along small streams, Coeur d'Alene 

 Mountains Idaho, Spokane Co., Washington. 



27 OSMORHIZA Jour. Phys. lxxxix. 



Perennials from thick aromatic roots, with ternately decom- 

 pound leaves, ovate variously toothed leaflets, involucre and in- 

 volucels few-leaved or wanting and white flowers in few-rayed 

 and few-fruited umbels. Calyx-lobes obsolete. Fruit linear to 

 linear-oblong, caudate, attenuate at base, acute above, very 

 bristly on the ribs. Carpel slightly flattened dorsally or not at 

 all, nearly pentagonal in section, with equal ribs and thin peri- 

 carp. Oil-tubes obsolete in mature fruit. 



O. nuda Torr. Pac. R. R. Rep. iv, 93. Stems rather slender, 1-3 feet 

 high, divaricately branched, somewhat pubescent or glabrous : leaves 

 twice ternate ; leaflets 6-24 lines long, toothed and cleft : umbel long ped- 

 uncled, 3-6-rayed, mostly naked; rays slender, spreading 2-4 inches long: 

 ♦pedicels 2-12 lines long : fruit with not very prominent ribs : stylopodium 

 and style very short, seed-face concave. Very common in wooded dis- 

 tricts. Alaska to California and the Rocky mountains. 



28 GLYCOSMA Nutt. T. & G. Fl. i, 639. 



Mostly tall perennials from thick aromatic roots with ter- 

 nately decompound leaves, ovate variously toothed leaflets, 

 mostly without involucre or involucels, and white flowers in few- 

 rayed umbels. Calyx-teeth obsolete. Fruit linear to linear-ob- 

 long, not attenuate :at base, acute above, glabrous or somewhat 



