30 
Slender and glabi’ous: leaves simply pinnate or re- 
duced to petioles Tiedemannia, 10 
Stout and pubescent: leaves large andternately com- 
pound Hekaceeum, 1 1 
Stylopodium depi’essed. 
Caulescent and branching. 
Flowers white. 
Slender: leaves pinnately dissected: dorsal ribs 
filiform: Texan Eubyta^nia, (i 
Stout: leaves ternately or pinnately compound: 
dorsal ribs prominent Angeeica, 7 
Stout: leaves pinnately decompound: dorsal ribs 
winged Seeinum, 8 
Flowers yellow .Pastinaoa, 12 
Acaulescent or nearly so Peucedanum, K! 
Oil-tubes more than one in the intervals. 
Caulescent and branching. 
Dorsal ribs obsolete; laterals corky thickeneu: flow- 
ers yellow POEYTiENIA, I.*] 
Dorsal ribs prominent; laterals not corky thickened: 
flowers white. 
Leaves ternately or pinnately compound Angelica, 7 
Leaves much more compounded Conioselinitm, !) 
Acaulescent or nearly so. 
Lateral wings corky-thickened: dorsal ribs filiform. 
Dwarf, with small pinnate or lobed leaves Coeopteba, 14 
Tall and stout, with large pinnately decompound 
leaves Leptot^nia, 15 
Lateral wings membranous: dorsal ribs filiform Peucedanum, 16 
Lateral wings thickened; dorsal ribs very prominent 
or slightly winged Pseudocymoptebus, 17 
* * F'r7iit n:)t strongly flattened dorsally {iisually sorne- 
xvhat laterally flattened). 
Oil-tubes none. 
Seed-face concave. 
Stylopodium conical. 
Fruit linear-oblong, glabrous Anthbiscus, 38 
Fruit linear-oblong, bristly Osmobhiza, 41 
Fruit of nearly distinct globose carpels .Bieoba, 4 
Stylopodium depressed. 
Leaves simple and perfoliate — Bupleubum, 39 
Leaves large and decompound Conium, 44 
Seed-face plane. 
Leaves simple and lobed: southwestern Boweesia, 57 
Leaves biternate: introduced at the east ..Egopodium, 5(! 
