164 
Spring Flora of Oklahoma 
scarcely 2-lipped. Sterile filament sparingly bearded. Capsule ovoid, 
pubescent, reticulate-veined, as long as the calyx. 
On dry prairies. May-July. Common. 
5. Pentstemien graradiflorus Nutt. Large-flowered Beard- 
tongue. Glabrous and somewhat glaucous. Stem 2°-4° high. Leaves 
all entire and obtuse, the basal ones obovate, narrowed into broad 
petioles, those of the lower part of the stem sessile, oblong or oval, 
l'-2y 2 ' long, the upper nearly orbicular, cordate-clasping. Thyrsus 
leafy-bracted, the bracts orbicular and cordate. Flowers nearly 2' 
long. Corolla lavendar-blue, the tube rather abruptly dilated above 
the calyx, the limb somewhat 2-lipped. The sterile filament incurved, 
villous and capitate at the summit. Capsule 8"-10" high, three 
times as long as the calyx. 
On prkiries. M^ay-August. Blaine County. 
6. Pentstemon acummatus Dougl. Sharp-leaved Beard- 
tongue. Glabrous and glaucous. Stem 6'-24' high, leafy. Leaves 
entire, the lower and basal ones oblong or spatulate, narrowed into 
petioles, the upper sessile or clasping, lanceolate or ovate-lanceolate, 
2'-3' long. Thyrsus sometimes one-sided, usually leafy-bracted be¬ 
low. Corolla blue, 9 r '-10" long, its tube rather gradually dilated, 
limb 2-lipped. Sterile filament bearded along the dilated summit. 
Capsule twice as long as the calyx. 
In dry soil. May-August. Blaine County. 
III. COLLINSIA Nutt. 
Winter-annual or biennial herbs. Leaves opposite or 
verticillate. Flowers blue, pink, white, or variegated, ver- 
ticillate or solitary in the axils. Calyx carfipanulate, 5-cleft. 
Corolla irregular, 2-lipped. Stamens 4, didynamous. Cor¬ 
olla with a gland on the upper side of the tube near the 
base. Stigma capitate or 2-lobed. Capsule ovoid or glob¬ 
ose. Seeds peltate, concave on the inner side. 
1. Collinsia verna Nutt. Blue-eyed Mary. Glabrous or pu- 
berulent. Stem 6'-24' long, simple, or branched. Leaves opposite, 
the lower broadly ovate or orbicular, crenate or entire, slender-peti- 
oled. Middle leaves sessile or cordate-clasping, ovate or oblong, den¬ 
tate, l'-2' long, floral leaves ovate to spatulate, dentate or entire. 
Upper whorls 4-6-flowered. Corolla 6"-8" long, its lower lip blue, 
the upper purple or nearly white, the lobes emarginate or truncate. 
Capsule globose, shorter than the linear calyx-lobes. 
In moist soil. April-June. Wlichita and Arbuckle Mountains. 
