In addition to the recently described =Inodes Uresana= (_Sabal Uresana_ Trelease, Rep. Mo. Bot. Gard. =12=: 79), there is another large-seeded _Inodes_ on the western slope of Mexico, a specimen of which was collected at Acaponeta, State of Tepic (no. 1528) by Dr. J. N. Rose,[4] for whom this species may be named =Inodes Rosei=. The seeds are of the same size and shape as those of _I. Uresana_, but have the surface much more finely rugose, or nearly smooth, with the embryo directly lateral, not subdorsal. The branches of the inflorescence are slender and but little over 1 mm. in diameter instead of fusiform and thickened in the middle to nearly 3 mm. as shown in Professor Trelease’s photographic illustration. THRINAX Linn. f.; Swartz, Prod. Veg. Ind. Occ. 51. 1788 In the genus _Thrinax_ were formerly placed all the West Indian fan-palms with smooth stems and no midribs, but the gradual discovery of numerous and diverse species has resulted in propositions for subdivision and segregation on the part of several botanists. As usual these new groups have been characterized very inadequately, and that mostly from the flowers and seeds, and with no attempt at establishing correlations of habit or other vegetative features without which the classification is likely to remain formal and artificial, as well as useless for popular and field study. Possibly no ecological differences exist among the _Thrinax_-like palms of other regions, but in Puerto Rico there are, as shown in the discussion of the following genus, two well-defined types, one of which varies the ordinary short columnar habit by the possession of a tall slender and flexible trunk which doubtless enables it to compete in a measure with the rapid growth of the surrounding vegetation, and which is also obviously adapted for withstanding the force of the strong winds encountered in the exposed places apparently preferred by palms of this species.