278 Umbellaceae 
lets (ours). Calyx-teeth none. Fruit oblong, flattened laterally, with rather wide com- 
missure; ribs equal, very slender or prominent (ours) ; stylopodium prominent, flat; oil- 
tubes none or continuous about the seed cavity (ours). (Gk. bous—an ox, pleuron—=a 
rib; referring ot the conspicuous leaf-veins of some species.) E. 
B. americana ©. & R. 
ZIZIA ALEXANDERS 
Perennial, smooth; stem 3—9 dm. high. Leaves mostly simple or ternate or 
quinate; in ours the radical leaves simple, cordate, crenately toothed. Flowers yellow; 
umbels compound; involucre none; involucels of small bractlets. Calyx-teeth promi- 
nent. Fruit oblong or ovate, glabrous, flattened laterally; central fruit in each umbellet 
sessile; stylopodium none; oil-tubes large, | in each interval, 2 on the commissure side. 
(Honor of I. B. Ziz, a Rhenish botanist.) E. 
Z. cordata Koch (Heart-leaved Alexanders) 
CICUTA WATER HEMLOCK 
Tall, glabrous, branching, poisonous, in marshes. Leaves pinnate or ternate; leaflets 
serrate. Flowers white; involucre none or of few bracts: umbels compound, many- 
rayed. Calyx-lobes prominent. Fruit oblong to orbicular, laterally flattened, glabrous: 
stylopodium conical; ribs corky, ‘strong, flattish, the laterals the largest; oil-tubes | in 
each interval, 2 on the commissure side. (The Latin name.) 
A.  Bulblets not present in the axils of the leaves. 
B. Fruit orbicular. 
~C. Leaflets lanceolate to ovate-lanceolate, closely and sharply toothed or even 
cleft, strongly reticulate beneath, thickish. W. FE. (C. purpurata.) 
C. douglasii C. & R. 
CC. Leaves lanceolate to linear-lanceolate, not so closely nor sharply serrate, ot 
strongly reticulate beneath, thinner. W. E 
C. vagans Gr. 
BB. Fruit oblong. E. C. occidentalis Gr. 
AA. Bulblets present in the axils of the upper leaves. F. 
C. bulbifera L. 
AMMI BISHOP’S-WEED 
Annual, glabrous. Flowers white; involucre of foliaceous bracts; involucel-bracts 
prominent or minute. Fruit small, ovate, glabrous, flattened laterally dorsal and in- 
termediate ribs filiform to wide and obtuse: lateral ribs closely applied to those of the 
other carpel and forming a dilated band to the fruit; stylopodium flat or none; oil-tubes 
I in each interval. (Greek name for some plant of this family.) W. 
IX visnaga Lam. (Tooth-pick Plant) 
TAENIOPLEURUM 
Herbs. Erect, glabrous, from a fascicle of thickened root-fibers; stems 9-12 dm. 
high. Leaves ternate and then 1—2-pinnate; leaflets toothed, lanceolate to ovate. Flow- 
ers white; involucre and involucels of many conspicuous bracts. Calyx-lobes prominent. 
Fruit flattened laterally, oblong, glabrous: ribs wide, prominent; stylopodium prominent, 
conical; oil-tubes very large, 1 in each interval, 2 on the commissure side. (Gk. taenion 
=a band, pleuron—a rib; referring to the wide ribs of the carpels.) U. 
T. howellii C. & R. 
