识别要点：Strobilanthes sunhangii resembles S. medogensis, but differs by its stems subterete, glabrous (vs. slightly sulcate, bifariously puberulent); spikes (7–)11–22 cm long (vs. 3–6 cm long), rachis glabrous (vs. bifariously pubescent); corolla outside and lobes pinkish-white, inside purplish-pink (vs. corolla yellowish-white, but dull purple on lobes), the tube bent to ca. 90° twice (vs. straight), lobes apices emarginate (vs. rounded); calyx 7–8 mm long, glabrous, 5-lobed to middle (vs. ca. 12 mm long, gland- tipped pubescent, 5-lobed to base), lobes ovate, equal (vs. narrowly oblong-elliptic, subequal); stamens included (vs. exserted), filaments of shorter pair ca. 2 mm long (vs. 7–8 mm long), longer pair ca. 4 mm long (vs. 9–10 mm long), anther thecae ca. 4 mm (vs. ca.1 mm); style with sparse gland-tipped trichomes (vs. glabrous).
形态特征：Undershrubs 1–2 m high, gregarious. Stems subterete, glabrous, slightly swollen at node. Leaves slightly anisophyllous, smaller one ca. 2/3 of the larger one in size; petiole 3–7 mm long or petiole of smaller leaf in each pair shorter, sulcate, glabrous; blades ovate to lanceolate-ovate, smaller ones 4.2–6.9 × 1.2–2.0 cm, larger ones 8.2–10.1 × 2.2–3.2 cm, both surfaces glabrous, densely covered with numer- ous linear cystoliths, secondary veins 3–5 on each side of midvein and prominent on both surfaces, base rounded to broadly cuneate, slightly oblique, margin serrulate, apex acuminate and narrowly caudate. Inflorescences of axillary spikes, simple or rarely 2-furcate, slender, (7–) 11–22 cm long; rachis glabrous; bracts and bracteoles not seen, caducous. Flowers (0.6–) 1.0–2.5 (–3.0) cm apart on rachis. Calyx 7–8 mm long, glabrous, 5-lobed to middle; lobes ovate, equal, margins narrowly scarious, 1-nerved abaxially, conspicuous after drying, apices acuminate. Corolla 2.8–3.3 cm long, cam- panulate, outside and lobes pinkish-white, inside purplish-pink, outside glabrous, in- side glabrous except for bifarious hirsute retaining the style ; tube basally cylindrical, ca. 3 mm wide and ca. 6 mm long, then bent to ca. 90° and gradually wid- ened to 9–12 mm wide at middle and 1.6–1.8 cm long, then secondly bent to ca. 90° and tube upper cylindrical 9–12 mm wide and 1.6–1.8 cm long; lobes broadly elliptic, 8–9 × 7–8 mm, apices emarginate . Stamens 4, didynamous, included; the united part of filaments glabrous at base, with dense villous on middle and margin, with slightly sparse villous on upper (Fig. 3E), shorter pair ca. 2 mm long, longer pair ca. 4 mm long; anther thecae oblong, ca. 4 mm long. Pollen grains prolate in outline,74.1 (72.2–76.1) × 49.7 (48.1–50.4) μm, P/E = 1.49, tricolporate, ribbed pseudocolpi 12, exine reticulate (Fig. 4). Ovary ca. 5 mm long, glabrous; style ca. 1.8 cm long, with sparse gland-tipped trichomes. Capsule not seen.
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