168 
Spring Flora of Oklahoma 
pubescent. Stem simple or branched, 4-sided, l°-4° high. Leaves 
oblong or ovate, 3'-6' long. Flowers solitary or several together in 
axils. Corolla blue, 18"-24" long. Capsule club-shaped, longer than 
or equaling the calyx. 
In dry woods. May-July. Frequent. 
2,. Ruellia ciliosa Pursh. Hairy Ruellia. Hirsute or pube¬ 
scent. Stem 12'-30' high. Leaves hairy, ciliate, oblong or ovate, 
sessile or nearly so, long. Flowers clustered or solitary in 
the axils. Corolla blue, l%'-2' long. Capsule shorter than the 
calyx. 
In dry soil. May-September. Common. 
II. DIANTHERA L. 
Herbs mostly perennial. Leaves opposite, entire or 
toothed. Flowers irregular, axillary, solitary or clustered 
in the axils. Calyx 5-parted. Corolla 2-lipped. Upper lip 
erect, concave, entire or notched. The lower prominently 
veined, spreading, 3-lobed. Stamens 2, inserted on the 
throat of the corolla. Ovary 2-celled, 4-ovuled. Style sim¬ 
ple, acute. Stigma entire, or 2-lobed. Capsule flattened, 
narrowed below into a little stalk. Seeds flat, orbicular or 
ovate. 
1. Dianthera americana L. Dense-flowered Water Willow. 
Perennial, glabrous. Stem grooved and angled, usually simple, 
12'-30' high. Leaves lanceolate or linear-lanceolate, 3'-6' long, en¬ 
tire. Flowers violet or nearly white, capitate-spicate at the ends 
of slender, axillary peduncles. Bractlets linear-subulate, shorter 
than the flowers. Corolla 5"-6" long, its tube shorter than the lips, 
the base of the lower lip rough and palate-like. Capsule 6" long. 
In waste and wet places. May-August. Comanche and Potta¬ 
watomie counties. 
FAMILY 82. PLANTAGINACEiE. Plantain Family. 
Annual or perennial, mostly acaulescent, herbs, with 
1-several-ribbed or nerved radical leaves, and small, per¬ 
fect, polygamous or monoecious flowers, bracteolate in 
dense, terminal, long-scaped spikes or heads, or, rarely, 
solitary. Calyx 4-parted, inferior, persistent. Corolla 
hypogynous, scarious or membranous, mostly marcescent, 
