Torenia crustacea (L.) Cham. & Schlecht. Weak, annual herb, creeping to ascending, 5-15 cm high, inconspicuously scaberulous; stems of older plants branched below many times, rooting at lower nodes, sometimes flushed with purple. Petioles to 4 mm long; blades variable in shape, +/- ovate, obtuse to acute at apex, subcordate to rounded at base and decurrent to base of petiole, 12 mm long and 12 mm wide or smaller, crenate to serrate, ciliolate; veins pinnate. Flowers solitary in the axils, the terminal flowers often in an inflorescence of 3; pedicels to 12 mm; calyx +/- bilabiate, 5-parted, 3-4 mm long; corolla bilabiate, +/- 5 mm long, violet to white, the lower lip spreading, 3-lobed; stamens 4, in 2 pairs, held next to upper lip; filaments of one stamen pair longer; thecae divergent; staminodia knotty, arising from near the bottom of the free part of the filament; style to 25 mm long, persistent until later stages of fruit; stigmas 2. Capsules ovoid, to 4 mm long, septicidally dehiscent; seeds numerous, tan, ca 0.3 mm long, the surface granular. Croat 6579. A common plant of open areas of the Laboratory Clearing; no doubt in other clearings as well. Flowers and fruits from May to October.