Description:—An herbaceous plant with erect stems, sometimes 6 ft. high, simple or branched. Stems obtusely 4-angled, glandular-pilose. Leaves opposite, sometimes alternate, petiolate; petioles 0·5-5 cm. long, grooved above, convex beneath, glandular-pilose; lamina 2-6·5 cm. long, ovate, more or less 3-lobed with the lobes crenate (the uppermost leaves not lobed), cordate at the base, palmately veined, with the veins prominent beneath, depressed above, glandular-pubescent. Flowers solitary, axillary, with often two abortive flowers in the same leaf-axil. Pedicels 5 mm. long, terete, glandular-pilose. Calyx divided almost to the base; the lobes erect, 0·8-1 cm. long, lanceolate, acuminate, sub-obtuse, glandular-pilose; the anterior lobe the smallest. Corolla-tube 3·5 cm. long, ventricose at the base, then slightly constricted and widening into a broad campanulate portion 1·4 cm. diameter, glandular-pilose; lobes 0·8 cm. long, about 1 cm. broad, transversely oblong, rounded above; the posterior lobe longer. Stamens of two different lengths, inserted above the ventricose portion of the corolla-tube; filaments 0·9-1·3 cm. long, glabrous; anthers 5 mm. long, linear. Ovary 6 mm. long, oblong in outline, densely villous, with 2 divergent horns at the apex; style 1·8 cm. long, terete, glabrous; stigmas recurved, papillose. Fruit 2 cm. long, oblong, with 2 divergent horns, glandular-pilose.
[Plate 87.]—Fig. 1, portion of flowering branch; Fig. 2, corolla laid open; Fig. 3, pistil; Fig. 4, cross-section of ovary; Fig. 5, stigmas; Fig. 6, stamens and anther; Fig. 7, fruits; Fig. 8, fruit dehisced; Fig. 9, leaf; Figs. 10, 11, abortive flowers.
F.P.S.A., 1923.
S. Gower del.