Thunbergia grandiflora
Content
Description
Woody vine. Young stems subquadrate to quadrate-sulcate, pubescent. Petiole, 40-100 mm long, naked; blade ovate to subcircular, 6-20 x 3-13.5 cm, acute to acuminate at apex, cordate to truncate at base, pustulate and pubescent on both surfaces, venation palmate, margin coarsely and irregularly lobed below middle, lobes to 17 mm long. Inflorescence of axillary, many-flowered, pedunculate, dichasiate thyrses, to 30 cm long; peduncle 1-10 cm long, peduncle and rachis pubescent; dichasia opposite, 1-3 per axil, peduncules 2.5-6 cm long, pubescent; proximal bracts sessile to subsessile, subfoliose, 10-70 x 7-40 mm, distal bracts lance-subulate to subulate, 2-6 x 1-1.5 mm, pubescent; bracteoles often coherent on posterior side, ovate-elliptic to obovate, 3.5-47 x 16-22 mm, rounded-apiculate at apex, truncate at base, minutely scabrous-pubescent and bearing small, scattered, black dots without. Calyx annular, unlobed, purplish, densely pubescent; corolla light purple, lavender or white with a yellowish throat, 60-80 mm long, externally glabrous, limb regular, 65-85 mm in diam., lobes subelliptic, 30 x 25-40 mm, apically subtruncate; stamens ± homodynamous, 21-22 mm long, thecae 9-11 mm long (including basal appendage), subequal in size, parallel, equally inserted, thecae of anterior pair of stamens pubescent, armed with a rigid, sharp, white, awnlike appendage 2-3 mm long, thecae of posterior stamens less densely pubescentwith either 1 or both thecae appendaged at base; style 21 mm long, glabrous, stigma lobes subfunnelform, equally inserted, 1.1-1.2 mm long. Capsule body globose, coriaceous, 16 mm in diam., stout, flattened, subulate beak ca. 20 mm long; seeds not seen.