金塔火焰花 jin ta huo yan hua

Phlogacanthus pyramidalis (Benoist) Benoist.

Herbs to 1 m tall, perennial. Stems 4-angled, glabrous. Petiole ca. 2.5 cm; leaf blade elliptic to elliptic-ovate, 9-23 × 5.5-10 cm, abaxially glabrous or pubescent along veins, adaxially glabrous, secondary veins 8-10 on each side of midvein, base cuneate and decurrent onto petiole, margin entire, apex acute to shortly acuminate. Thyrses terminal, to 26 cm; cymes 3-flowered; peduncle 1-3 mm, pubescent; bracts leaflike, ovate to lanceolate, 0.6-3 × 0.3-1.2 cm, diminished in size apically on inflorescence, pubescent; bracteoles subulate, ca. 1 mm. Pedicel 3-5 mm. Calyx ca. 3.5 mm, glabrous or sparsely pubescent; lobes equal, linear, apex acuminate to acute. Corolla light purplish red, ca. 1 cm, bent to 90º and abruptly inflated at middle, glabrous; lobes ovate, ca. 2 × 1.5 mm. Stamens 2; filaments ca. 0.8 cm, glabrous; anther thecae ovoid, ca. 1.5 mm, connective hirsute; staminodes ca. 2 mm. Ovary glabrous; style ca. 1 cm, glabrous; stigma slightly 2-cleft. Capsule clavate, ca. 2.2 cm, 4-angled, 8-seeded. Seeds ca. 2 × 2 mm, compressed.

Forests. Hainan [Vietnam].