Herb 100-300 mm, usually procumbent strand plant. Stems glabrous, angular when young, rounded with age. Leaves petiolate, glabrous, succulent, amphistomatic; petiole 2-4 mm long; blade widely ovate to rounded-emarginate, 20-30 x 17-22 mm, venation pinnately reticulate, lateral veins 4-5 pairs, margins entire. Inflorescence terminal, rarely branched, up to 100 mm, usually bearing 5-9 flowers (up to as many as 17) singly in decussate arrangement, 7-14 mm apart; bracts solitary, minute; bracteoles paired. Flowers zygomorphic, pedicellate; pedicels 3-5 mm long. Calyx persistent, pentamerous divided to base; teeth triangular, 8 x 2 mm, clothed outside in glandular and eglandular trichomes, strigose inside. Corolla pentamerous, infundibuliform; tube 10 x 16 mm, dilated in the upper 2/3, ventrally corrugated and sculptured, glandular without, strigose in basal 1/3 within, throat glabrous; lobes rounded, papillate; lateral lobes 4 x 3 mm; median lower lobe 5x3 mm, with palate and tessellated nectar guides. Stamens 4, epipetalous, didynamous; filaments glabrous, 4-6 mm long; anthers bithecous, mucro-nate, slightly oblique, 1.5-2 mm long, with basal glandular hairs. Pollen perprolate, 33 x 15 µm tricolporate with annular lips surrounding the pore; pseudocolpi 2, margocolpi 2, poles sometimes apocolpate. Ovary oblong, 3-4 x 2 mm, densely pubescent except along sutures; style pubescent basally, 7-8 mm long, filiform and arcuate; stigma shortly bifid with rounded lobes; nectariferous disc cupular, 1 mm deep, shallowly lobed. Fruit bilocular, loculicidal capsule, 25 x 6 mm; stipe 13 mm, apex rostellate. Seeds reniform, laterally flattened, 4-5 mm in diam., 1.2 mm thick, reticulate and tuberculate; tubercles spheroidal to elongate mounds; jaculators spathulate, 5-6 mm long.
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A herb. It grows 20-30 cm tall. The stems can be erect or straggling. They are 4 sided in cross section. The nodes are 10-15 cm apart. The leaves are opposite and triangle shaped. They are 3-7 cm long by 3-4 cm wide. The flowers are tube shaped and 1.5 cm long. They have purple marks. The flowers are on one side of the 10 cm long flower stalk. The fruit is a dry capsule.
Corolla 1.2-1.5 cm, ca. 0.5 cm wide at mouth, middle lobe of lower lip slightly reflexed.