32. Leonurus. Calyx top-shaped, the rigid spiny-pointed teeth soon spreading. Nutlets truncate and acutely 3-angled at top. Leaves cleft or incised.
33. Lamium. Calyx-teeth not spiny-pointed. Nutlets sharply 3-angled, truncate.
34. Galeopsis. Calyx tubular-bell-shaped; the 5 teeth spiny-pointed. Anthers transversely 2-valved, the smaller valve ciliate.
[++][++] Stamens often deflexed or contorted after anthesis.
35. Stachys. Calyx tubular-bell-shaped, equally 5-toothed or the 2 upper teeth united into one. Nutlets rounded at top.
1. TRICHOSTÈMA, L. Blue Curls.
Calyx bell-shaped, oblique, deeply 5-cleft; the 3 upper teeth elongated and partly united, the 2 lower very short. Corolla 5-lobed; the lobes narrowly oblong, declined, nearly equal in length; the 3 lower more or less united. Stamens 4, with very long capillary filaments, exserted much beyond the corolla, curved; anther-cells divergent and at length confluent.—Low annuals, somewhat clammy glandular and balsamic, branched, with entire leaves, and mostly solitary 1-flowered pedicels terminating the branches, becoming lateral by the production of axillary branchlets, and the flower appearing to be reversed, namely, the short teeth of the calyx upward, etc. Corolla blue, varying to pink, rarely white, small; in summer and autumn. (Name composed of θρίξ, hair and στῆμα, stamen, from the capillary filaments.)
1. T. dichótomum, L. (Bastard Pennyroyal.) Viscid with rather minute pubescence; leaves lance-oblong or rhombic-lanceolate, rarely lance-linear, short-petioled.—Sandy fields, E. Mass. to Ky., south to Fla. and Tex.
2. T. lineàre, Nutt. Puberulent, more slender and less forked; leaves linear, nearly smooth.—Conn. to La., near the coast; in sandy ground.