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FOC | Family List | FOC Vol. 11 | Burseraceae

2. Garuga Roxburgh, Pl. Coromandel. 3: 5. 1811.

白头树属 bai tou shu shu

Trees or shrubs deciduous. Branchlet pith without vascular strands, pubescent. Leaves odd-pinnate, alternate, usually stipulate, crowded toward ends of branches; leaflets opposite, subsessile or with petiolule, serrate; stipels usually present. Flowers bisexual, in much-branched panicles, present before leaves, usually crowded toward end of branches, 5-merous; receptacle concave, globose or cupular. Sepals nearly free, deltoid, valvate. Petals inserted at edge of disk, valvate, apex incurved in bud, later recurved. Disk 10-grooved. Stamens 10, inserted in grooves at margin of disk; filaments subulate, base hairy; anthers oblong. Ovary subsessile or sessile, 4- or 5-celled; ovules 2 in each cell; style short; stigma capitate, shallowly 4- or 5-lobed. Drupe subglobose; pyrenes 1-5, small, bony, grooved. Seeds with membranous testa; cotyledons folded.

About four species: tropical Asia, N Oceania, and some Pacific islands; four species (one endemic) in China.

1 Flowers 3-6 mm; drupe 5-10 × 5-12 mm   (2)
+ Flowers 6-10 mm; drupe 10-23 × (9-)11-18 mm   (3)
2 (1) Inflorescences densely tomentose; flowers ca. 3 mm; drupe ovoid, ± deltoid in cross section, base with persistent calyx.   1 G. forrestii
+ Inflorescences pubescent or glabrescent; flowers 4-6 mm; drupe subglobose, base without persistent calyx.   2 G. floribunda var. gamblei
3 (1) Rachis and leaflets sparsely pubescent with short hairs; flowers ca. 6 mm; ovary glabrous.   3 G. pierrei
+ Rachis and leaflets pubescent with long hairs, especially when young; flowers 7-10 mm; ovary sparsely pubescent.   4 G. pinnata

Lower Taxa


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