Gesneria viridiflora (Decne.) Kuntze

Gesneria viridiflora (Decaisne) O. Kuntze

Gesneria viridiflora (Decaisne) O. Kuntze, Rev. Gen. 2:473,1891.

Shrubs: stems woody, erect, to 6 m tall, bark rugose to smooth, gray to yellow or reddish, verrucose, glabrous, striated, apex resinous, lenticels elongated, erumpent; branches few, from the base, green to brown.

Leaves alternate: petioles sulcate to terete, 0.7–2.8 cm long, 1–4 mm in diameter, green to red or brown, glabrous, verrucose, resinous; blades narrowly elliptic to obovate, 5.1–18.4 cm long, 1.9–7.5 cm wide, coriaceous, base narrowed to cuneate, acute or cordate, sometimes oblique, margin entire to serrate, apex retuse or obtuse to acute, adaxial surface green, glabrous, glossy, midvein sometimes bearing glandular trichomes, abaxial surface green or copper-colored, glabrous, midvein prominent, reddish or green, verrucose, lenticels sometimes elongated.

Inflorescences of one to many flowers, usually exceeding the subtending leaves: peduncles terete, 3.4–18.5 (–25) cm long, 2–4 mm in diameter, becoming wider toward the apex, reddish-brown, verrucose, glabrous, resinous; bracts 2–4, linear to ovate, 0.6–1.2 cm long, 3 mm wide, red, resinous; pedicels terete, 0.5–1.4 (–7.0) cm long, 1–3 mm in diameter, red to brown, glabrous; floral tube narrowly to broadly turbinate, 4–7 mm long, 3–5 mm wide, green to reddish-brown, glabrous, sometimes verrucose; calyx lobes (4–) 5, erect to spreading, connate for 1 mm at their bases, each narrowly ovate to sulcate, sometimes keeled, thickened apically or rounded, 0.5–1.1 cm long, 1–3 mm wide at the base, both sides green to red, glabrous, sometimes resinous, inside sometimes puberulent, veins not prominent; corolla campanulate, tube ca 1.2 cm long, oblique at the base, 3–7 mm wide, narrowed to 3–4 mm at the middle, then expanding to 1.0–1.2 cm wide at the oblique mouth, outer surface yellow-green to red or purple to pallid brown, puberulent with glandular hairs to glabrous, res inous, glossy, inner surface pilose to glabrous, green, usually with reddish veins, limb 5-lobed, upper lobes semiorbiculate, 3–5 mm long, 0.6–1.3 mm wide, lateral lobes rounded, 4–5 mm long, 0.6–1.1 cm wide, basal lobe rounded, 4–5 mm long, 8 mm wide, margins entire to dentate or fimbriate; stamens 4 (–5), adnate to base of the corolla tube for about 1 mm, included, filaments linear, curved or geniculate, 0.9–1.6 cm long, 1 mm wide, green to red, pilose to glabrous, anthers oblong to ovate, 2–3 mm long, 1.5–2 mm wide, coherent in two pairs by their apices; ovary inferior, apex pilose, disc annular, 5-angled, style 1.3–1.6 cm long, 1–2 mm in diameter, green to yellow at the base, reddish toward the apex, puberulent, stigma stomatomorphic, papillate.

Capsule turbinate to nearly spherical, 0.5–1.2 cm long, 4–8 mm wide, reddish-brown, verrucose, resinous, costae 5–15, not prominent; seeds linear to fusiform, twisted, 0.5–1.0 mm long, 0.25 mm wide, reddish-brown.

Gesneria viridiflora là một loài thực vật có hoa trong họ Tai voi. Loài này được (Decne.) Kuntze mô tả khoa học đầu tiên năm 1891.