. The natural history of plants. Botany. Pig. 297. Flower (f). Fig. 298. Long. sect, of flower elongate-cuneiform or dilated on one side to a wing. Natives of Oceania, from Australia to the north of the Indian archipelago, abundant in southern Asia and^ New Caledonia, Tristania has alter- nate or, more rarely, opposite leaves, and flowers in axillary more or less ramified and compound cymes. Metrosideros (fig. 297, 298) has, like the following genera, free exserted stamens in- serted in the periphery Metrosideros tomentosa. of the receptacular orifice. It has been observed in the warm â region
. The natural history of plants. Botany. Pig. 297. Flower (f). Fig. 298. Long. sect, of flower elongate-cuneiform or dilated on one side to a wing. Natives of Oceania, from Australia to the north of the Indian archipelago, abundant in southern Asia and^ New Caledonia, Tristania has alter- nate or, more rarely, opposite leaves, and flowers in axillary more or less ramified and compound cymes. Metrosideros (fig. 297, 298) has, like the following genera, free exserted stamens in- serted in the periphery Metrosideros tomentosa. of the receptacular orifice. It has been observed in the warm â regions of south-east- ern Asia and Oceania, from Malaya to New Zealand and as far as the Cape of Good Hope and in south-western America. The placen- ta consists of two ver- tical lobes, thick and elongate, covered with ovules. It becomes salient, in the form of a short horizontal or ascending club, in M, stipulacea, of which has been made the Chilian genus Tepualia, where it bears a small number of ascending ovules, and in some Oceanic species, as M. ciliata, paradoxa, ch-ysantha, etc., where the ovules are more numerous and, more frequently still, inserted over the entire surface of a shield-like dilatation of its free extremity. They have served as type of the genus Xanthostemon and have, nearly always, alternate leaves, whUst the Metrosideros proper have generally opposite leaves. The calyx valvate or slightly imbricate, is ordinarily regular in the true Metro- sideros^ often a little irregular in Xanthostemon. In a species of which the genus Pleurocalyptus has been made, the summit separates irregu- larly on one side at the time of blooming and rises like a small unequal lid. These plants cannot, in our opinion, form distinct genera, and we shall consider them only as sections of Metrosideros. The same will be the case, notwithstanding its cymes contracted to a peduncu- late head, with M. glonmlifera, distinguished under the generic name of Sfynca/rpia, whilst among Eucalyptus,
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1871
