COMPARATIVE VIEW. 157
reduction to a single species i.s even confinncd hy the mul- titude of varieties that exist ;^ by nearly the whole of these varieties being destitute of seeds ; and by the existence of a plant indigenous to the continent of India, producing perfect seeds; from which, therefore, all of them maybe supi^osed to have sprung.
To these objections to the hypothesis of the i)lurality of species of the Banana, may be added the argument referred to as contributing to establish its Asiatic origin ; for we an! already acquainted with at least five distinct species of Musa in equinoctial Asia, while no other s})ecies has been found in America ; nor does it appear that the varieties of Banana, cultivated in that continent, may not etpially Ije reduced to Musa sapientum as those of India : and lastly, it is not even asserted that the types of any of those sup- posed species of American Banana, growing without culti- vation, and producing perfect seeds, have any where been found."
That the Bananas now cultivated in equinoctial Africa, m come originally from India, appears to me equally probable, though it may be allowed that the Ensete of Bruce'^ is perhaps a distinct species of this genus, and indigenous only to Africa.
^ Musa sapientum, Uox. Corom. fab. 275.
^ M. Desvaux, in a dissertation on the genus Musa {in Joiini. iJe Boianiqiic appl. \o\. 4!, p. 1), has come to the same conclusion respecting the original country of the cultivated Banana, and also that its numerous varieties arc reducible to one species. In this dissertation he takes a view of the floral en- velope of Musa peculiar to himself. The perianthium in this genus is generally described as consisting of two unequal divisions or lips. Of these, one is divided at top into five, or more rarely into three segments, and envelopes the other, which is entire, of a difi'crent form and more petal-like texture. The en- veloping division M. Desvaux regards as the calyx, the inner as the corolla. It seems very evident to me, however, that the deviation in Musa from the regular form of a Monocotyledonous flower, consists in the confluence of the three divisions of the outer scries of the perianthium, and in the cohesion, more or less intimate, with these of the two lateral divisions of the inner series ; the third division of this series, analogous to the labellum in the OrchidciT, being the inner lip of the flower. This view seems to be established l)y the several modifications observable in the dillcrent species of Musa itself, especially in M. super /ja or]{o\huv^h, {Plants of Coromaud. IJ, tab. -223), and in t lie flower of Musa figured by Plumicr, {Nov. Gen. t. 3J'), but still more by the irregularity confined to the inner series in Strelitzia, and by the near approach to regularity, even in this scries, iu Kavenala (or Urania), both of which belong to the same natural order. •* Travels, vol. 5, p. 3G.
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