274 Umbellaceae 
N. Ribs of the carpels conspicuously winged. THASPIUM (p. 282) 
NN. Ribs of the carpels filiform. ZIzZIA (pie27 09 
GROUP 4 
A. — Stylopodium conic. 
B. Fruit round; carpels globose; carpel-ribs very slender, inconspicuous. 
BERULA (p. 280) 
BB. Fruit ovate or oblong. 
C. Ribs of the carpels prominent, equal. 
D. Umbel 15—25-rayed; fruit oblong to ovate; carpels flattened laterally if 
at all. LicusTicuM (p. 280) 
DD. Umbel 5—12-rayed; fruit oblong to linear; carpels slightly flattened dorz 
sally if at all. WASHINGTONIA (p. 276) 
CC. Ribs of the carpels filiform or almost none. EULoPHus (p. 279) 
AA. — Stylopodium flat or none. 
E. Seed-face sulcate or decidedly concave. 
F.  Carpels flattened dorsally. AULOSPERMUM (p. 284) 
FF. Carpels terete. -_DRUDEOPHYTUM (p. 277) 
EE. Seed-face plane or but slightly concave. 
G. All of the ribs of the carpels conspicuously winged. 
H. Plants of the seashore, tomentose; wings of the carpels corky-thickened. 
GLEHNIA (p. 283) 
HH. Plants of mountains and plains, glabrous or merely pubescent; wings of 
the carpels thin. 
I. Leaves pinnate; leaf-segments short, crowded, more or less confluent; 
flowers purple or pinkish. PHELLOPTERUS (p. 283) 
II. Leaves ternate and then pinnate; leaf-segments short, linear, more or less 
hard-tipped; flowers yellow or white. PTERYXIA (p. 283) 
GG. _ Ribs of the carpels not winged. 
J. Stem-leaves simple, entire, clasping or perfoliate. © BUPLEURUM (p. 277) 
JJ. ‘Stem-leaves none or not as above. 
K. Flowers yellow; carpels-ribs all filiform; plant without leafy stem. 
HESPEROGENIA (p. 277) 
KK. Flowers white or greenish; at least the lateral carpel-ribs corky. 
L. Stem 3 dm. or less high; lateral carpel-ribs thick and corky, the dorsal 
filiform. OROGENIA (p. 277) 
LL. Stem 6 or more dm. high; all the carpel-ribs corky and equally prom- 
inent. 
M. Calyx-teeth minute; fruit flattened laterally; leaves pinnate. 
SIUM (p. 279) 
MM. Calyx-teeth none; fruit not or hardly flattened either way; leaves 
2—3-ternate. COELOPLEURUM (p. 281) 
HYDROCOTYLE WATER PENNYWORT 
Perennial, low, in or near water; stem slender, creeping, rooting from the nodes 
(ours). Leaves orbicular-peltate or reniform (ours) ; in ours 3—7-cleft, the lobes crenate. 
Flowers small, white; umbels in ours simple, 5—10-flowered; involucre none. 
Calyx-teeth none or minute. Petals entire. Fruit more or less orbicular, strongly flat- 
tened laterally; carpels 5-ribbed; oil-tubes none or small. (Gk. hydor—water, kotyle—a 
flat cup; some species have somewhat cup-shaped peltate leaves.) W. 
H. ranunculoides L. 
