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FOC | Family List | FOC Vol. 19 | Acanthaceae | Strobilanthes

85. Strobilanthes longespicata Hayata, Icon. Pl. Formosan. 9: 83. 1920.

长穗马蓝 chang sui ma lan

Semnostachya longespicata (Hayata) C. F. Hsieh & T. C. Huang.

Shrubs 1.2-2 m tall, much branched, drying green. Branches ± 4-angled, sulcate, glabrous. Petiole 1-3 cm, sulcate, glabrous; leaf blade lanceolate to oblong-oblanceolate, 7-20 × 2-6 cm, glabrous, both surfaces with abundant cystoliths, secondary veins 6-10 on each side of midvein, base attenuate, margin remotely serrate, apex acute to shortly acuminate. Inflorescences axillary, spikes, (5-)10-15 cm, simple or less commonly branched; peduncle and rachis pubescent; bracts narrowly ovate to lanceolate, (5-)10-13 × (3-)6-7 mm, glabrous, cystoliths prominent, base truncate, apex acuminate; bracteoles linear-lanceolate, 9-11 × ca. 2 mm, scurfy-pubescent, apex acuminate. Flowers in opposite pairs, basally ca. 1 cm apart on rachis but apically imbricate. Calyx 5-lobed almost to base, accrescent in fruit; lobes linear-lanceolate, 9-15 × 2-3 mm, scurfy-pubescent, prominently 1-veined, margin ciliolate, apex acuminate. Corolla pale purple, 4.5-5 cm, straight or slightly bent, outside glabrous, inside glabrous except for trichomes retaining style; tube basally cylindric and ca. 3 mm wide for ca. 1 cm then gradually widened to 1.5-2 cm at mouth; lobes oblong, ca. 8 × 7 mm, subequal, apex emarginate. Stamens 4, included; filaments glabrous, shorter pair ca. 2 mm, longer pair ca. 8 mm; anther thecae oblong, 2-2.5 × ca. 1 mm; pollen type 3. Ovary cylindric-oblong, apically slightly hispid; style filiform, 3-3.2 mm, hispid. Capsule linear, ca. 1.7 cm, glabrous, 4-seeded. Seeds suborbicular in outline, ca. 3 mm in diam., flattened. Fl. Sep-Dec, fr. Feb-May.

● Forests; 200-1000 m. Taiwan.


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