SECTION I: G. TOMENTOSUM 69 



Nomenclature. The observations offered under G. Davidsonii and 

 G. Klotzschianum regarding the cottons of the Galapagos Islands re- 

 ceive renewed interest through the discovery, in herbaria, of material 

 sufficient to justify the separation of the present plant. Unlike the Possibly 

 other species named, the leaves, instead of being entire, are, in the 

 new species, deeply 3-foliate and the bracteoles broad ovate cordate, 

 deeply laciniate characters that ally it much more closely with 

 G. vitifolium than with G. Klotzschianum. Unfortunately I have 

 not seen the fruit, and it is thus probable that it may have to 

 be removed from the present group and placed nearer to the culti- 

 vated cottons of America, in which case it would become of even 

 greater interest than at present, since it might then be regarded 

 as denoting a condition that may have prevailed prior to man's Man's 

 influence on the genus. At the time at which this species was influence 

 collected by Darwin (' Voyage of the Beagle,' 1831-6) cotton could 

 hardly have been cultivated anywhere on the Galapagos Islands, 

 and G. Darwinii may accordingly be the survival of an ancient 

 form that may at one time have had a wide distribution on the 

 mainland of America. In part support of this suggestion I would 

 draw attention to the fact that the seeds of G. Davidsonii have a 

 very short but separable floss rather than a fuzz, and its pollen 

 grains approximate in size and shape more closely to those of 

 G. vitifolium and G. barbadense than to those of any of the members 

 of the present section of the genus. 



6. G. TOMENTOSUM, Nutt., Seem., Fl. Vit. (1865), 22 ; G. BELIGIO- 

 SUM, A. Gray in Bot. Explor. Exped. under WilJces (pub. 1854), 

 179 ; G. TOMENTOSUM, Hillebrand, FL Hawaiian Islands, 50 ; 

 Todaro, Eelaz. Cult, dei Cot. (1877), 126; G. SANDWICENSE, 

 ParL, Sp. Cot. (1866), 37, t. vi., /. B. 



Mao or Hulu-hulu cotton of Hawaii. 



A subscandent shrub, all parts coated with hoary short tomentum ; Descrip- 

 leaves thick, cordate, 3-(sometimes 5-) palmatifid, lobes ovate deltoid 

 acute and apiculate, veins thick, prominent, eglandular, stipules 

 minute, very caducous (f. 2) ; bracteoles small, thick, tomentose on 

 both surfaces, toothed, ovate-oblong acute, slightly cordate, but not 

 clawed (f. 5); calyx tomentose, large, loose, with ten veins (ff. 3 

 and 4) ; fruit very small, hardly more than twice the length of calyx 

 (ff. 5 and 6) ; seeds large, irregular, densely coated with a dark rusty 

 wool not referable to two layers (f. 7). (See Plate No. 5, ff. 1-7.) 



