Casuarina glauca
Casuarina
Brazilian beefwood, gray she-oak, scaly-bark beefwood, suckering Australian-pine, swamp she-oak
she-oak
gray-brown, finely fissured and scaly.
drooping;
segments 8-20 × 0.9-1.2 mm, glabrous, occasionally waxy;
longitudinal ridges flat to slightly rounded-convex;
teeth usually marcescent, 12-17, erect, 0.6-0.9 mm.
unisexual, staminate and pistillate on different plants.
rust-colored to white-pubescent, becoming glabrous;
peduncles 3-12 mm;
infructescence body 9-18 × 7-9 mm;
bracteoles broadly acute.
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.
permanent shoots with long-recurved teeth.
persistent branchlets distinguished from deciduous branchlets by shorter segments and differences in shape or size of leaves;
furrows deep and closed, concealing stomates.
spikes 1.2-4 cm, 7-10 whorls per cm;
anthers ca. 0.8 mm.
3.5-5 mm.
pale yellow-brown or grayish, dull, glabrous.
= 9.
Casuarina glauca
Casuarina
Commonly near brackish water; 0-50 m; introduced; Fla.; native, e coast Australia.
Casuarina glauca is widely cultivated in many parts of the world. Pistillate trees are very infrequent in the flora.
It is now considered a pest species in Florida because of root suckering. Its identification may be confused by the practice of some Florida nurserymen of grafting scions of Casuarina glauca onto rootstocks from the other two species.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Species 17 (3 in the flora).
Hybrids are frequent in cultivation; in the flora, hybrids are known between all combinations of the three species.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Longitudinal ridges of branchlets flat or slightly rounded-convex; leaf teeth 12–17; teeth on young permanent shoots long-recurved. | C. glauca |
1. Longitudinal ridges of branchlets prominently angular; leaf teeth (6–)7–10; teeth on young permanent shoots erect to spreading. | → 2 |
2. Branchlets ± densely and obviously pubescent; teeth (6–)7–8, not marcescent; infructescence body 12–24 × 9–11 mm, bracteoles acute; samaras 6–8mm. | equisetifolia subsp. equisetifolia |
2. Branchlets sparsely and minutely pubescent; teeth 8–10, marcescent; infructescence body 7–14 × 4–6 mm, bracteoles broad-acute; samaras 3–4 mm. | cunninghamiana subsp. cunninghamiana |
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