Spring Flora of Oklahoma 
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axillary, densely many-flowered. Flowers whitish. Calyx-teeth usu¬ 
ally 10, subulate. 
In waste places. May-September. Frequent. 
IV. GLECOMA L. 
Low, diffuse, creeping herbs, with nearly orbicular or 
reniform, crenate leaves, and blue or violet flowers in small, 
axillary, verticillate clusters. Calyx oblong-tubular, 15- 
nerved, not 2-lipped, unequally 5-toothed. Corolla-tube en¬ 
larged above, 2-lipped. The upper lip erect, the lower 
spreading. Stamens 4, didynamous. Ovary deeply 4- 
parted. Nutlets ovoid, smooth. 
1. Glecoma hederacea L. Ground Ivy. Gill-over-the-ground. 
Perennial, the creeping stems leafy. Leaves green on both sides, 
6"-18" in diameter. Clusters few-flowered, the flowers 7"-10" long. 
Corolla bluish-purple, corolla tube 3 times as long as the calyx. The 
upper pair of stamens much longer than the lower. 
Waste places and about houses and gardens. March-May. Fre¬ 
quent. 
V. PRUNELLA L. 
Perennials, with stems simple or nearly so, and sessile, 
3-flowered flower clusters in the axils of kidney-shaped 
bracts, the whole forming a spike or head. Calyx tubular- 
bell-shaped, somewhat 10-ribbed. Upper lip broad, 3- 
toothed, the teeth short. Lower lip with two longer teeth. 
Upper lip of the corolla upright, arched, and entire. The 
lower spreading, reflexed, fringed, and 3-cleft. Stamens 
4, reaching up under the upper lip, with the tips of the 
filaments 2-toothed, only one tooth anther-bearing. Ovary 
deeply 4-parted. Nutlets ovoid, smooth. 
1. Prunella vulgaris L. Self-heal. Heal-all. Stem procumb¬ 
ent, ascending or erect, 2'-24' long. Leaves ovate, oblong or oblong- 
lanceolate, entire, crenate, dentate or incised, l'-4' long. Spikes 
terminal, very dense, G"-12" long, becoming 2'-4' long in fruit. Cor¬ 
olla violet or purple or sometimes white, 4"-6" long. 
In fields, woods and waste places. May-October. 
VI. LAMIUM L. 
Annual or perennial, hairy herbs. Calyx tubular-bell- 
