UMBELLIFER.E. (PARSLEY FAMILY.) 119 



less, linear-oblong, entire, or 1 to 2-toothed : involucre a single linear leaflet 

 or wanting ; involucels of several short bracts : oil-tubes 2 to 4 in the intervals, 

 4 to 10 on the commissure. Fl. i. 624. C. foeniculaceus, Torr. & Gray. Colo- 

 rado and northward, thence westward to California and Washington. 



* * Flowers white. 

 <- Peduncles shorter (sometimes longer in No. 3) than the leaves. 



3. C. montanus, Torr. & Gray. Root long and fleshy: stem 2 to 6 inches 

 high: leaves glaucous, ovate in outline, bipinnatelt/ divided ; segments rather 

 few and distant : involucre and involucel somewhat companulate, scarious, about 

 5-parted : flowers polygamous : fruit with membranous wings ; oil-tubes 4 on the 

 commissure. Loc. cit. Colorado, northward and westward. 



4. C. glomeratUS, Raf. Root thick and fusiform: stem 3 to 8 inches 

 high ; caudex bearing the leaves and peduncles at the summit : leaves on long 

 petioles, ternatebj divided and bipinnat ifid : leaflets of the palmately 5 to 1 -parted 

 involucre coherent at base and partly adnate to the rays of the umbellets : fruit 

 with thickened and somewhat spong>/ wings ; oil-tubes 3 to 4 in the intervals, 

 about 8 on the commissure. Colorado and northward, also eastward along the 

 Missouri and Arkansas Rivers. 



5. C. campestris, Torr. & Gray. Root tuberous: plant about 2 inches 

 high: leaves 3-parted, the divisions remote, bipinnat i Jid : involucels minute: fruit 

 with somewhat thickened and spongy wings, the alternate ones obsolete ; oil- 

 tubes 6 on the commissure. Loc. cit. " Plains of the Platte near the Rocky 

 Mountains" (Nuttall). 



i- <- Peduncles equalling the leaves or longer. 



6. C. (?) anisatus, Gray. Acaulescent, cespitose from a much-branched 

 caudex, glabrous: leaves narrow, on long petioles, somewhat rigid, pinnate; 

 leaflets 6 to 10 pairs, pinnately parted; segments entire or laciniately lobed, 

 linear, pungently acute: involucre usually none; involucels of 6 to 8 linear 

 leaflets : fruit irregularly winged ; calyx-teeth conspicuous ; oil-tubes one in 

 each narrow interval, 2 to 4 on the commissure. Proc. Acad. Philad. 1863, 

 p. 63. Colorado, Nevada, and the Wahsatch. 



7. C. bipinnatus, Watson. Cespitose, the short branches of the root- 

 stock covered with the crowded remains of dead leaves, glaucous, rough-puberu- 

 lent : leaves pinnate ; leaflets 4 or 5 pairs, subequal, 3 to 5 lines long or less, 

 pinnately divided; segments linear, entire or cleft into short linear lobes: 

 scape 4 to 6 inches high, much exceeding the leaves : involucels of several linear- 

 lanceolate leaflets : fruit nearly sessile, 1 i or 2 lines long ; wings thin, but some- 

 what corky, narrow; oil-tubes 3 or 4 in the rather broad intervals. Proc. Am. 

 Acad. xx. 368. C. foeniculaceus of Hayd. Rep. 1871. Resembling C. alpinus. 

 Mountains of Montana, Hat/den, Watson, Canby. 



16. PEUCEDANUM, L. 



Calyx-teeth obsolete or slightly prominent. Disk and stylopodium small 

 and depressed. Perennials, with fusiform or tuberous roots, caulescent or 

 acaulescent : umbels mostly involucellate : leaves pinnate to decompoundly 

 dissected. Watson, Proc. Am. Acad. xi. 121. 



