95 
No. 57. 
Casuarina glauca, Sieb. 
The Swamp Oak. 
(Natural Order CASUARINACE./E.) 
Botanical description. —Genus, Casuarina. (See p. 74, Part XIII.) 
Botanical description. —Species, C. glauca, Sieber, in Sprengel’s Syst. iii, 803 
(1826). Poliowing is the original description :— 
C. ramulis teretibus strictis glaucis scabro-pubescentibus, denticulis vaginarum minutissimis arete 
appressis, spicis dense imbricatis, vaginis floriferis multifidis setaceis, Nov. Holl. 
Following are the numbers of Sieber’s type specimens :— 
No. 425 (B.F1. vi, 196); No. 325 (Miq. in DC. Prod.). 
Bentham’s description of the species in B.P1. vi, 196 is erroneous, through 
confusion with C. lepidophloia, F.v.M., and perhaps with another species. The 
following freshly drawn out description may serve :— 
A tree attaining a considerable size, with more or less glaucous, rather thick, erect branchlets, 
striate, with as many shallow grooves as there are rudimentary leaves, but otherwise smooth 
and terete. The branches rather erect, but somewhat pendulous at the top. 
Rudimentary leaves generally 15 in the whorl, varying from 12-16. 
Flowers monoecious, the males in dense terminal spikes, generally from about f to above 1 inch 
in diameter, the rudimentary leaves in the floral whorls with long, fine, slightly ciliate points; 
the females terminal on short lateral branches. 
Cones usually subglobose, but truncate at the top, generally rather above J- inch in diameter, 
rarely attaining f of an inch, the valves very prominent, more or less pubescent when young 
with a dorsal keel very prominent, especially in the young cones. 
Winged nuts small, grey. 
Botanical Name. — Casuarina, explained in Part XIII, p. 79; glauca (see 
the original description), in reference to the glaucousness of the branchlets. 
Vernacular Names. —The commonest and most expressive name is “Salt¬ 
water Swamp Oak,” to distinguish it from the “ Fresh-water Swamp Oak” ( C. 
Cunninghamiana') . Sometimes it is simply called “Swamp Oak,” or merely “Bivcr 
Oak,” but “ Biver Oak ” is a far better name for C. Cunning ham iana, as the rivers 
on the banks of which C. glauca is found are only tidal. I recommend the name 
“ Swamp Oak ” for this tree, and shall recommend the name “ Biver Oak ” to he 
reserved for C. Cunninghamiana. 
B 
