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FOC | Family List | FOC Vol. 11 | Dipentodontaceae

2. Perrottetia Kunth in Humboldt et al., Nov. Gen. Sp. 7, ed. 4°: 73; ed. f°: 57. 1824.

核子木属 he zi mu shu

Shrubs or small trees, dioecious, deciduous. Branchlets smooth, usually slightly zigzagged. Stipules small, caducous. Leaf blade margin sharply serrulate, crenate, or subentire. Inflorescence a raceme or panicle of thyrses. Flowers usually 4- or 5-merous. Male flowers: stamens inserted on disk margin; filament subulate; anther subglobose or ellipsoid. Female flowers: disk cup- or ring-shaped; ovary semi-immersed in disk, mostly 2-loculed; ovules 2 per locule, basally attached, erect. Fruit a ± dry berry, subglobose or depressed globose, 2-4-seeded. Seeds subglobose, erect; aril thin.

About 20 species: tropical America, NE Australia, China, Indonesia, Malaysia, New Guinea, Pacific islands, Philippines; three species (two endemic) in China.

A new species has been recently described from Yunnan and Myanmar (Bartholomew, Armstrong & Fritsch, 2021. PhytoKeys 183: 67–76).

1 Inflorescences thyrses in a raceme; fruit apex rounded.   1 P. racemosa
+ Inflorescences thyrses in a panicle; fruit apex emarginate.   (2)
2 (1) Corolla and calyx lobes ligulate, undifferentiated, not overlapping, ca. 1.0 × 0.2–0.4 mm, glabrous, margins entire; style in fruit 1.0–1.4 mm, usually persistent; inflorescences glabrous.   2 P. arisanensis
+ Corolla and calyx lobes triangular, slightly differentiated, calyx lobes ca. 1.0 × 0.5–0.6 mm and overlapping corolla lobes, corolla lobes ca. 0.5–1.2 × 0.3– 1 mm, margins of both calyx and corolla lobes minutely denticulate; style in fruit ca. 0.2 mm, often deciduous; inflorescences sparsely tomentose,   3 P. taronensis

Lower Taxa


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