The Bottle tree, DELABECHEA
These trees grew here only in that almost inaccessible, crater-like hollow, which had impeded me in my attempt to reach the summit.[*] Leaving the horses, however, I scrambled through the briars and up the rocks to the summit, but found it, after all this trouble, too thickly covered with scrub to afford me the desired view to the westward, even after I had ascended a tree on the edge of the broad and level plateau, so thickly covered with bushes. On returning and descending eastward towards the open country, I found a much more practicable way down than that by which I had ascended. Returning to the valley of the Cogoon, I passed between the two summits, and found a good open passage to the westward between the brigalow. Thermometer, at sunrise, 20°; at noon, 70°; at 4 p.m., 68°; at 9, 30°. Height above the sea 1043 feet.
[* This remarkable plant constitutes a new and very curious genus of Sterculiads. It agrees with STERCULIA in the position of the radicle with respect to the hilum, but it is, otherwise, a BRACHYCHITON, with which it more especially corresponds in the singular condition of the seeds. These are placed, six together, in the interior of long-stalked, ovate, mucronate, smooth, deep brown follicles, of a tough papery texture, and lined with a thin fur of stellate hairs. The seeds themselves are also closely covered with starry hairs, which are so entangled that they hold the seeds together firmly; these hairs, however, are absent from the upper half of the seed, whose thin brittle vascular primine is shining, smooth, and marked with a brown nipple, the remains of the foramen. Within the primine lies the bony crustaceous secundine, which is quite loose, and seems as if it were independent of the primine. Eventually the end of the thin brittle primine breaks like an eggshell and the secundine falls out. The seeds themselves, remaining attached to each other and to the follicle, resemble six deep cells, or may be rather compared to half a dozen brown eggshells, placed on the broad end, from which the young have escaped through the point.
Sir Thomas Mitchell has named the genus after Sir Henry T. De la Beche, as president of a Society which has greatly encouraged him in his Australian researches; and in honour of a science which has occasionally thrown some light on his dark and difficult path. It may be scientifically described as follows:—
DELABECHEA.
CHAR. GEN. CALYX 5-fidus, valvatus. ANTHEROE congestae. STYLI. ... STIGMATA. ... FOLLICULI coriaceo-papyracei, 6-spermi, longè stipitati, intus stellato-pubescentes. SEMINA albuminosa, albumine bipartibili cotyledonibus foliaceis parum adhaerente, pube stellari basi vestita, inter se et fundo folliculi cohaerentia; PRIMINÂ laxâ, tenui, fragili, apice foramine incrassato notatâ, SECUNDINÂ crustaceâ, demum liberâ chalazâ magnâ circulari notatâ. EMBRYONIS radicula hilo contraria.
DELABECHEA RUPESTRIS.
ARBOR grandis, trunco in dolii speciem tumescente. LIGNUM album, laxum, mucilagine repletum, vasis porosis (bothrenchymate) maximis faciem internam cujusque zonae occupantibus, radiis medullaribus tenuibus equidistantibus. FOLIA lineari-oblonga, acuminata, integerrima, in petiolum filiformem ipsis duplbreviorem insidentia, subtus pallida et quasi vernice quâdam cinereâ obducta. INFLORESCENTIA axillaris, trichotoma, tomentosa, foliis brevior. CALYX valvatus, utrinque tomentosus.
The wood of the tree has a remarkably loose texture: it is soft, and brittle, owing to the presence of an enormous quantity of very large tubes of pitted tissue, some of which measure a line and half across; they form the whole inner face of each woody zone. When boiling water is poured over shavings of this wood a clear jelly, resembling tragacanth, is formed and becomes a thick viscid mass; iodine stains it brown, but not a trace of starch is indicated in it. No doubt the nutritious quality of the tree is owing to the mucilage, which is apparently of the same nature as that of the nearly allied Tragacanth tree of Sierra Leone (STERCULIA TRAGACANTHA).