Adinandra integerrima T. Anders ex Dyer

Trees 5-15 m tall. Young branches grayish brown, glabrous; current year branchlets densely fulvous pubescent; terminal buds fulvous sericeous. Petiole 5-7(-12) mm, appressed pubescent when young but glabrescent; leaf blade oblong-elliptic to oblong-ovate, 8-13 × 3-5 cm, leathery, abaxially pale green, sparsely appressed pubescent or glabrescent, and becoming yellowish green when dry, adaxially dark green, slightly shiny, and glabrous, midvein abaxially elevated and adaxially impressed, secondary veins 12-16 on each side of midvein and raised on both surfaces, base broadly cuneate, margin entire or apical portion undulately denticulate, apex acuminate. Flowers axillary, solitary. Pedicel 2-3.5 cm, thick, recurved, appressed pubescent or glabrescent; bracteoles caducous, ovate to long ovate, 2-3.5 mm, sparsely pubescent. Sepals ovate to triangular-ovate, 1-1.3 × 1-1.3 cm, leathery, outside sparsely pubescent or glabrescent, margin glandular and ciliolate, apex acute. Petals white, broadly ovate to oblong-ovate, 8-10 × 5-6 mm, outside yellowish sericeous along median portion, apex obtuse to acute. Stamens ca. 30, 5-6 mm; filaments 1.5-2 mm, glabrous, basally slightly connate; anthers oblong, 2.5-3 mm, with filiform trichomes, connective exserted. Ovary depressed globose, yellowish brown sericeous, 5-loculed with many ovules per locule; style simple, 3-5 mm, sericeous. Fruit red when mature, ovoid to globose, 1-1.7 cm in diam., many seeded, appressed pubescent. Seeds brown, compressed-reniform, small, shiny. Fl. Apr-May, fr. Sep-Oct.

S and SE Yunnan [Cambodia, Malaysia, Myanmar, Thailand, Vietnam].

Forests in valleys or on mountain slopes; 700-1900 m.

Adinandra lutescens Craib; A. phlebophylla Hance.

Adinandra integerrima is a species of plant in the Pentaphylacaceae family. It is found in Malaysia and Singapore. It is threatened by habitat loss.

Adinandra integerrima es una especie de planta dentro de la familia de las Theaceae. Se puede encontrar en Malasia y en Singapur. Está en peligro debido a la destrucción del hábitat.

Đối với các định nghĩa khác, xem Đuôi lươn (định hướng).

Chè đuôi lươn hay sum nguyên, sum lông, sum, hồng đạm lá nguyên, ngầu nền xà (danh pháp hai phần: Adinandra integerrima) là loài thực vật thuộc họ Chè. Loài này đang bị đe dọa mất môi trường sống.

全缘叶杨桐（学名：Adinandra integerrima）为山茶科杨桐属下的一个种。