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FOC | Family List | FOC Vol. 9 | Hamamelidaceae

2. ALTINGIA Noronha, Verh. Batav. Genootsch. Kunsten 5. art. 2: 1. 1790.

蕈树属 tan shu shu

Trees, evergreen; terminal buds perulate, narrowly ovoid. Leaves petiolate; stipules usually present, minute, caducous or connate with petiole, leaving small scars; leaf blade lanceolate to ovate or obovate, leathery, discolorous, margin usually crenate-serrate, occasionally entire, venation pinnate. Plants monoecious. Male inflorescence a globose to shortly cylindrical, pedunculate, many-flowered, head, grouped in terminal or subterminal, compound racemes or panicles; each flower with 1–4 basal bracts. Female inflorescences capitate, subterminal or in lower part of male inflorescence, long-pedunculate, 5–30-flowered. Flowers unisexual. Sepals and petals absent. Male flowers: stamens (4 to) many; filaments very short or absent; anthers obovate-ovoid, thecae 2-sporangiate, each dehiscing by a longitudinal slit or rudimentary valve, apex truncate. Female flowers: staminodes (also interpreted as carpellodes) absent or needlelike; ovary semi-inferior; ovules ca. 30–50 per locule, axile; styles subulate, divergent, often strongly recurved; stigmas papillose, caducous or basal parts persistent in fruit. Infructescences globose, base truncate. Capsules woody, dehiscing loculicidally by two 2-lobed valves; staminode teeth and styles not persistent. Seeds many, upper ones sterile, wingless; one or a few lower ones fertile, flattened, narrowly winged along margin or only at apex; seed coat thick and hard; endosperm thin. 2n = 32.

About 11 species: Bhutan, Cambodia, China, India, Indonesia, Laos, Malaysia, Myanmar, N Thailand, Vietnam; eight species (five endemic) in China.

The resin is used in medicine and perfumes, and the timber for making furniture.

1 Inflorescences 5–8-flowered; infructescence obconical with cuneate base.   (2)
+ Inflorescences 10–28-flowered; infructescence subglobose.   (3)
2 (1) Leaf blade ovate-lanceolate, 2–2.5cm wide, leathery, base rounded, margin usually entire, less often serrate.   1 A. gracilipes
+ Leaf blade ovate, 3–5 cm wide, thinly leathery, base slightly cordate, margin serrate.   2 A. tenuifolia
3 (1) Leaf blade ovate, base rounded or slightly cordate.   (4)
+ Leaf blade oblong, elliptic-oblong, ovate-lanceolate, lanceolate or obovate, base cuneate.   (5)
4 (3) Leaf blade membranous, lateral veins 6–8 on each side.   3 A. excelsa
+ Leaf blade leathery, lateral veins more than 10 on each side.   4 A. multinervis
5 (3) Leaf blade oblong, elliptic-oblong, ovate-lanceolate or lanceolate; petiole 1.5–2 cm.   (6)
+ Leaf blade obovate; petiole 0.4–1 cm.   (7)
6 (5) Leaf blade usually oblong, elliptic-oblong, 6–15 × 3.5–6.5 cm, margin distinctly serrate.   5 A. yunnanensis
+ Leaf blade usually ovate-lanceolate or lanceolate, 6–8(–12) × 2.5–4 cm, margin undulate and indistinctly serrate.   6 A. siamensis
7 (5) Leaf blade apex acute to acuminate.   7 A. chinensis
+ Leaf blade apex rounded or obtuse.   8 A. obovata

Lower Taxa


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