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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).
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Inflorescences thyrses in a raceme; fruit apex rounded. |
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1 P. racemosa |
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Inflorescences thyrses in a panicle; fruit apex emarginate. |
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(2) |
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| 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. |
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2 P. arisanensis |
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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, |
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3 P. taronensis |
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Lower Taxa
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