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FNA | Family List | FNA Vol. 3 | Casuarinaceae

1. Casuarina Linnaeus, Amoen. Acad. 4: 143. 1759.

She-oak [Neo-Latin casuarius, cassowary, from resemblance of drooping branchlets to feathers of the cassowary]

Young persistent branchlets distinguished from deciduous branchlets by shorter segments and differences in shape or size of leaves; furrows deep and closed, concealing stomates. Infructescences pedunculate, pubescent at least when immature; bracts thin in exposed portion, not vertically expanded; bracteoles ± protruding from surface of infructescence, never greatly thickened, always lacking dorsal protuberance. Samaras pale yellow-brown or grayish, dull, glabrous. x = 9.

Species 17 (3 in the flora): almost throughout range of family.

Hybrids are frequent in cultivation; in the flora, hybrids are known between all combinations of the three species.

1 Longitudinal ridges of branchlets flat or slightly rounded-convex; leaf teeth 12–17; teeth on young permanent shoots long-recurved.   3 Casuarina glauca
+ Longitudinal ridges of branchlets prominently angular; leaf teeth (6–)7–10; teeth on young permanent shoots erect to spreading.   (2)
2 (1) Branchlets ± densely and obviously pubescent; teeth (6–)7–8, not marcescent; infructescence body 12–24 × 9–11 mm, bracteoles acute; samaras 6–8mm.   1a subsp. equisetifolia
+ Branchlets sparsely and minutely pubescent; teeth 8–10, marcescent; infructescence body 7–14 × 4–6 mm, bracteoles broad-acute; samaras 3–4 mm.   2a subsp. cunninghamiana

Lower Taxa


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