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

32. Strobilanthes tubiflos (C. B. Clarke) J. R. I. Wood, Edinburgh J. Bot. 51: 264. 1994.

管花马蓝 guan hua ma lan

Strobilanthes petiolaris Nees var. tubiflos C. B. Clarke in J. D. Hooker, Fl. Brit. India 4: 458. 1884.

Subshrubs of unknown habit. Stems 4-angled to subterete, sulcate, glabrous except for a few trichomes in grooves. Petiole 5-10 mm; leaf blade ovate-elliptic, 6.5-16 × 3.5-8 cm, abaxially paler, sometimes purplish, and glabrous except for appressed trichomes on midvein, adaxially glabrous and with prominent cystoliths, secondary veins 4-7 on each side of midvein, base cuneate and decurrent as a wing onto petiole, margin dentate, apex acuminate. Inflorescences terminal, branched spikes, 2-4 cm; rachis gland-tipped pilose; sterile bracts leaflike, ovate, 9-10 × ca. 6 mm, with prominent cystoliths; floral bracts obovate, 5-6 × 2.5-3.5 mm, persistent, densely yellowish gland-tipped pubescent, cystoliths abaxially prominent, apex usually emarginate; bracteoles oblanceolate, ca. 5 × 1 mm, abaxially gland-tipped pubescent especially apically, apex obtuse. Calyx 7-8 mm, subequally 5-lobed almost to base; lobes oblong, ca. 1 mm wide, outside ciliate and apically gland-tipped pilose, inside glabrous. Corolla blue, 2-3 cm, curved, outside pilose, inside glabrous except for trichomes retaining style; tube basally cylindric and ca. 1 mm wide for ca. 3 mm then gradually widened to ca. 1 cm at mouth; lobes broadly ovate, ca. 2 × 3 mm, apex rounded. Fertile stamens 2, included; filaments glabrous, ca. 4 mm; anther thecae oblong, erect, ca. 2 × 0.8 mm; pollen type 3. Ovary oblong-ovate, ca. 1 mm, apically pilose; style ca. 2 cm, glabrous. Capsule oblong, ca. 6 × 2 mm, pubescent, 4-seeded. Seeds suborbicular in outline, ca. 1 × 1 mm, pubescent; areole prominent. Fl. Aug.

● Valleys, streamsides; 200-300 m. Xizang (Mêdog).


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