244 WILD AND CULTIVATED COTTONS 



Babinal lobes oblong acute or acuminate, sinus narrow and thrown up in 

 on ' folds characters that would suggest G. vitifolium. In Plate in., he 

 exhibits the bracteoles almost free, only slightly cordate, teeth with 

 long awl-shaped tails, alternating are three glands each protected by 

 a pair of bractlets ; calyx 5-toothed and tailed. Plate iv. represents 

 the bracteoles of Kabinal cotton (f. 1) much united (a protective 

 feature) and of Egyptian quite open (f. 2). 



In a footnote (p. 43) Cook says that Pachon cotton from western 

 Guatemala grown in an experimental plot at Lanham, Md., had a 

 large calyx completely covering the bud. It may be suggested that 

 the plant in question may have been G. microcarpum, the only 

 species known to me with the calyx so large as to completely enclose 

 the bud. (See Plate No. 36, f. 1.) The Kabinal cotton seems worthy 

 of special inquiry, since the much united bracteoles might be 

 suggestive of an influence derived from the cottons of Section II. 

 (p. 77) the majority of which are Asiatic species. A very striking 

 plant of this nature is a specimen in De Candolle's Herbarium grown 

 by L. Hahn in Martinique in 1870. It might be described as a 

 hybrid of G. vitifolium with fuzzy seeds and much united bracteoles. 



SECTION IV. Naked-seeded Cottons with the Bracteoles 

 free or nearly so and Glands conspicuous. 



BRACTEOLES only slightly united below or free ; possessed of large 

 conspicuous external glands within the auricles and often also between 

 the bracteoles and the calyx; SEEDS naked or nearly so and floss 

 easily removable; LEAVES often very large, mostly glabrous. 



There are both Old and New World forms in this section, but 

 only one, so far as at present known, has been met with in what 

 appears a truly wild condition, and that species might be spoken of 

 as Polynesian. Two others have been occasionally seen either as 

 wild plants or as escapes from cultivation, namely G. brasiliense and 

 G. vitifolium. 



ANALYTICAL KEY TO THE SPECIES. 



* Twigs strongly angled, glabrous and purple coloured ; leaves ovate, 

 faintly cordate, entire or three-lobed across the apex; flowers 

 small, only slightly exceeding the bracteoles ; petals yellow tinged 

 with purple. 



t Leaf-stalks when young ciliate, lobes of the leaves directed 

 upwards ; calyx cup-shaped, teeth 3-veined, acuminate or 



