Spring Flora of Oklahoma 
123 
Fruit not beaked, its ribs slender, narrower than the 
intervals between them. 1. C. procumbens. 
Fruit beaked, its prominent ribs mostly as broad as the 
intervals. 2. C. Teinturieri. 
1. Chaerophyllum procumbeus (L.) Crantz. Spreading Chervil. 
More or less pubescent, slender, spreading or erect, 6'-20' high. Leaves 
ternately decompound, the lower petioled, the upper nearly sessile. 
Fruit glabrous or minutely pubescent, oblong or linear-oblong, 2"-2 1 / 4" 
long. 
In moist ground. April-June. Common. 
2. Chaerophyllum Teinturieri Hook. Teinturier’s Chervil. 
Similar to the preceding species, much branched, and often taller. 
Fruit 3"-4" long, less than 1" wide, narrowed above into a distinct 
beak. 
In dry soil. March-May. 
III. COGSWELLIA Spreng. 
Perennial herbs, acaulescent or nearly so, from thick, 
fusiform or tuberous roots, with ternate, pinnate, or bi- 
pinnate, finely dissected leaves, and compound umbels of 
white or yellow flowers. Involucre none. Calyx-teeth most¬ 
ly obsolete. Stylopodium depressed or none. Fruit oval, 
oblong, or orbicular, glabrous or pubescent, dorsally com¬ 
pressed. Carpels with filiform, dorsal, and intermediate 
ribs, the lateral ones' broadly winged. Oil-tubes 1-4 in the 
intervals, 2-10 on the commissural side. Seed-face flat or 
slightly concave. 
1. CogswiePi^ daucifofia (Nutt.) M, E. Jones. Carrot-leaved 
Parsley. Foliage tomentose, becoming less dense in age. Peduncles 
4'-10' high, usually exceeding the leaves. Taproot stout. Leaves 
finely dissected into short, linear or filiform lobes. Rays of the 
umbel %'-l' long. Flowers yellow. Fruit broadly oval, glabrous, 
about 3" long. Oil tubes 1-3 in the intervals. 
Prairies. March-April. Common. 
IV. PLEITAENIA Coult. & Rose. 
Perennial, nearly glabrous herbs, with pinnately-decom- 
pound leaves, and compound umbels of yellow flowers. In¬ 
volucre none. Involucels of a few subulate, pubescent, de¬ 
ciduous bracts. Calyx-teeth prominent, triangular. Petals 
