272 Umbellaceae 
BB. Leaves ovate to orbicular or kidney-shaped. 
D. Marsh- or water-plants; leaves kidney-shaped, wider than long; umbel simple. 
Group 3, B (p. 273) 
“DD. Not marsh- nor water-plants; leaves ovate or longer, at least longer than 
wide; umbel compound. Group 1, B (p. 272) 
AA. Leaves compound or very deeply dissected. 
E. Fruit conspicuously bristly or scaly. Group | (p. 272) 
EE. Fruit not bristly nor scaly. 
F. Fruit strongly flattened dorsally; lateral ribs more or less prominently winged. 
Group 2 (p. 272) 
FF. Fruit not strongly flattened dorsally, usually somewhat flattened laterally. 
G. -Oil-tube O—1 in each interval. Group 3 (p. 273) 
GG. Oil-tubes more than | in each interval. GrouP 4 (p. 274) 
GROUP | 
A. Flowers in dense bracted prickly heads. ERYNGIUM (p. 275) 
AA. Flowers in compound umbels, the umbellets often in head-like clusters, but then not 
or hardly bracted. 
B. Fruit covered with hooked bristles; leaves merely coarsely lobed or |-compound. 
SANICULA (p. 275) 
BB. Fruit with bristles only on the ribs; leaves finely dissected or more than I-com- 
pound. 
C. Bnistles of the fruit barbed with arrow-head-like tips; stylopodium none. 
Daucus (p. 289) 
CC. Bristles of the fruit not barbed, or merely hooked by the curved tip; stylo- 
podium conical or short. 
D. Calyx-lobes prominent; fruit ovate or oblong; oil-tube | in each interval; 
leaves pinnately dissected into small narrow divisions. CAUCALIS (p. 276) 
DD. Calyx-lobes none; fruit linear-oblong or linear; oil-tubes none or nu- 
merous; leaves ternately decompound; leaflets wide, ovate, toothed. 
: WASHINGTONIA (p. 276) 
GROUP 2 
A. Oil-tube | in each interval. 
B. Plant with a leafy stem. 
C. Flowers greenish or white or purplish. 
D. Plant either slender or else pubescent at least in the umbels: stylopodium 
conic. 
FE. Plant slender, glabrous; fruit glabrous. OxYPOLIs (p. 285) 
EE. Plant stout, pubescent at least in the umbels: fruit hairy. 
F. Leaves 1—2-pinnate; leaflets oblong to linear-lanceolate, 2.55 cm. 
long. SPHENOSCIADIUM (p. 280) 
FF. Leaves large, ternate; leaflets round-cordate, 10—25 cm. long. 
HERACLEUM (p. 289) 
DD. Plant stout and glabrous; stylepoduim flat or none. ANGELICA (p. 282) 
CC. Flowers yellow. PASTINACA (p. 289) 
BB. Leafy stem none or almost none. LomaTiumM (p. 286) 
AA. Oil-tubes more than | in each interval. 
G. Stem leafy, branching. 
H. Leaves ternately or pinnately |—3-compound, ANGELICA (p. 282) 
HH. Leaves many times compound. CONIOSELINUM (p. 282) 
GG. Stem none or leafless and unbranched. 
I. Lateral wings of the fruit thin. 

