124 
Spring Flora of Oklahoma 
obovate-cuneate, with long, incurved tip. Stylopodium 
none. Fruit oval or obovate, much flattened dorsally, thick 
and corky. Oil-tubes 12-18. Seed flat. 
1. Pleiotaenla Nuttallii (DC.) Coult. & Rose. Nuttall’s Prai¬ 
rie Parsley. Foliage nearly glabrous. Stem 12'-36' high. Roots 
fusiform. Leaves pinnate, the segments deeply pinnatifid or parted, 
l'-3' long. Umbels 6-12 rayed. Pedicels finely pubescent, l"-2" long. 
Fruit glabrous, 3"-5" long. 
In dry soil. April-May. Common. 
V. CYNOSCIADIUM DC. 
Glabrous, slender, branching annuals, the lower and 
basal leaves mostly linear and entire, those of the stem 
mainly divided into few linear segments. Involucres and 
involucels of several subulate or narrowly-linear bracts. 
Flowers small, white, in terminal and lateral-compound 
umbels. Calyx-teeth short. Fruit ovoid, or oblong, nearly 
terete, glabrous, strongly ribbed, the lateral ribs larger. 
Oil-tubes solitary in the intervals and 2 on the commissural 
side of each carpel. Seed-face flat. 
1. Cyiiosciadium pinnatum DC. Pinnate Cynosciadium. Stems 
erect or decumbent, 12'-24' high. Basal leaves entire, or pinnately 
divided. Stem-leaves pinnately divided nearly to the midvein into 
3-9 narrowly linear entire segments, the terminal segment much 
longer than the lateral ones. Umbels 4-10 rayed. Fruit about 2" 
long, less tha^ 1" wide, crowned by the ovate calyx-teeth. 
In wet soil. May-August. Cleveland County. 
VI. SPERMOLEPIS Raf. 
Annual herbs, with erect, slender, branching stems. 
Leaves alternate, dissected into narrow segments. Flowers 
very small, white, in compound unequal-rayed umbels. In¬ 
volucre none. Involucels of a few, small, narrow bracts. 
Calyx-teeth obsolete. Fruit ovate, laterally flattened, tuber- 
culate or bristly. Oil-tubes solitary in the intervals, 2 on 
the commissural side. Stylopodium short, conic. 
Umbel-rays divaricate. 1. S. divaricatus. 
Umbel-rays ascending. 2. S. patens. 
