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FOC | Family List | FOC Vol. 12 | Theaceae

3. Polyspora Sweet, News Lit. Fashion. 2: 205. 1825.

大头茶属 da tou cha shu

Shrubs or trees, evergreen. Leaves alternate but often clustered apically on branchlets, petiolate; leaf blade leathery, pinnately veined, margin entire or serrate. Flowers axillary, solitary or in a short raceme. Pedicel short; bracteoles 2-7, caducous. Sepals 5, caducous after anthesis. Petals 5(or 6), basally ± connate. Stamens numerous; outer filament whorl adnate to petals; anthers dorsifixed. Ovary placentation axile. Capsule oblong-cylindric or cylindric, 5(or 6-8)-loculed, loculicidal; columella persistent to apex of locules. Seeds flat, apically with an oblong membranous wing; endosperm thin.

About 40 species: E and SE Asia; six species (two endemic) in China.

Molecular evidence has shown that Polyspora is not closely related to Gordonia J. Ellis, which is now considered to be strictly a New World genus (Prince & Parks, Amer. J. Bot. 88: 2309-2320. 2001; Yang et al., Pl. Syst. Evol. 248: 45-55. 2004).

1 Capsule 6-8-loculed.   5 P. tiantangensis
+ Capsule 5-loculed   (2)
2 (1) Leaf blade apex rounded, obtuse, or emarginate   (3)
+ Leaf blade apex bluntly acute, acuminate, or shortly acuminate   (4)
3 (2) Petiole 10-15 mm, glabrous; leaf blade margin entire or apically remotely crenate.   1 P. axillaris
+ Petiole 3-5 mm, appressed pubescent; leaf blade margin serrate.   2 P. chrysandra
4 (2) Current year branchlets, petioles, abaxial surface of leaf blades, and basal part of filaments with pubescence; capsule 4-5 cm.   4 P. longicarpa
+ Current year branchlets, petioles, abaxial surface of leaf blades, and basal part of filaments glabrous; capsule 1-3.5 cm   (5)
5 (4) Young branches slender; leaf blade narrowly oblong to oblanceolate, 8-13 × 2-3 cm; flowers ca. 4 cm in diam.   3 P. hainanensis
+ Young branches stout; leaf blade elliptic to oblong-elliptic, (9-)10-18 × 3-6(-7) cm; flowers 5 cm or more in diam.   6 P. speciosa

Lower Taxa


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