COULTER AND ROSE—NORTH AMERICAN UMBELLIFERAE. 93 
pound and with narrowly linear or filiform segments, involucre and 
involucels of few subulate bracts, and long-peduncled umbels (mostly 
in pairs) of yellow flowers. 
A monotypic genus, based on Thaspium trachypleurun Gray, 
belonging to the Rocky Moun- 
tain region of the United 
States. 
1. Harbouria trachypleura 
(Gray) C. & R. Rey. N. 
Am. Umbell. 125. 1888. 
Fig. 23. 
Thaspium trachyplearum Gray, 
Proc. Acad. Philad. 1862; 63. 
L865. 
Cicuta trachypleura Watson, 
Bibl. Index 417. 1878. 
From 3 to 6 dm. high; leaf 
segments mucronulate; umbels 
Fic, 23.—Harbouria trachypleura: a, b, x &. 
(mostly 2 long-peduneled ones) 15 to 25-rayed; rays 1 to 2.5 cm. long; 
pedicels 4 to 6 mm. long; fruit 4 mm. long. 
Type locality, ‘ton the mountains at middle and lower elevations,” 
Colorado; collected by //a/l & Harbour, no. 215, in 1862; type in 
Herb. Gray, duplicate in U. S. Nat. Herb. 
In the foothills of Colorado, and extending into Wyoming and New 
Mexico. : 
Specimens examined: 
Cotoravo: Hall & Harbour 215, in 1862; St. Vrain Canyon, Coulter, May 26, 
1873; Central City, Alice Eastwood, October, 1892; Morrison, Bethel 3612, 
June, 1895; Larimer County, Osterhout, July, 1895; Gore Mountains, alti- 
tude 2,850 meters, Bethel 3613, August, 1895; near Fort Collins, altitude 1,650 
meters, Baker, May 24, 1896. 
Wyomrc: Laramie Hills, Nelson, May-June, 1893; Table Mountain, Nelson 
160, June 2, 1894; Uinta County, Stevenson 31, July 17, 1894; Medicine Bow 
Mountains, Albany County, Nelson 3365, August 10, 1897. 
25. CICUTA L. Sp. Pl. 1: 255. 1753. 
Calyx teeth rather prominent. Fruit flattened laterally, oblong to 
orbicular, glabrous. Carpel with strong flattish corky ribs, the lat- 
erals largest (at least in section), without strengthening cells. Stylopo- 
dium low, sometimes low conical. Oil tubes solitary in the intervals, 
2 on the commissural side. Seed nearly terete or somewhat dorsally 
flattened, with face from plane to slightly concave. 
Smooth poisonous marsh perennials, with pinnately compound leaves 
and serrate leaflets, involucre of few bracts none, involucels of several 
slender bractlets, and white flowers. 
First species cited, C. virosa L. 
5872—_7 
