Spring Flora of Oklahoma 
133 
campanulate, bearded in the throat. Stamens 4, inserted 
on the corolla. Stigma capitate or obscurely 2-lobed. 
Capsule globose-ovoid, slightly compressed, didymous. 
Seeds smooth. 
1. Polypremum procumbens L. Polypremum. Stems tufted, 
4-angled, usually much-branched, 2'-12' long. Leaves narrowly linear, 
long, y 2 ”- 1" wide, sessile, minutely rough-toothed on the 
margins. Flowers solitary, sessile in the forks of the cymes and 
along their branches, leafy-bracted. Capsule crastaceous, about 
1" in diameter. 
In dry sandy soil. May-September. Lincoln County. 
FAMILY 69. GENTIANACEiE. Gentian Family. 
Annual or perennial herbs. Leaves entire, usually op¬ 
posite, sometimes alternate, without stipules. Flowers 
actinomorphic, solitary or in cymes. Calyx hypogynous, 
4-8-toothed or lobed. Corolla hypogynous, wheel, bell, or 
funnel-shaped, 4-8-lobed. Stamens 4-8, inserted on the 
corolla tube. Ovary 1-2-celled. Ovules many, on 2 op¬ 
posite placentas. Capsule 1-celled or partially 2-celled, 
2-valved, many-seeded. 
I. EUSTOMA Salisb. 
Glaucous, annual herbs, with opposite, sessile or clasp¬ 
ing, entire leaves. Flowers large, blue, purple, or white, 
long-peduncled, axillary and terminal, solitary or paniculate. 
Calyx deeply 5-6-cleft, keeled. Corolla broadly campanu¬ 
late, deeply 5-6-lobed, the lobes oblong or obovate, usual¬ 
ly erose-denticulate, stamens 5-6, inserted on the throat 
of the corolla. Ovary 1-celled. Stigma 2-lamellate. Cap¬ 
sule oblong or ovoid. Seeds foveolate. 
1. Eustoma Russellianum (Hook.) Griseb. Russell’s Eustoma. 
Stem stout, 12'-3()' high. Leaves oblong or ovate-oblong, 3-5 nerved, 
the upper usually acute at the apex, cordate-clasping at the base, 
l%'-3' long, the lower obtuse at the apex land narrowed into a ses¬ 
sile or auricled base. Flowers 2'-3' broad. Calyx-lobes long, acu- 
