Jennings: Contribution to Botany of Isle of Pines. 87 



bach & Wendland. Millspaugh also reports "Fine groves of large, 

 straight-trunked trees at Pedernales Point, Isle of Pines" for the 

 species Thrinax argentea (Jacquin) Loddige, op. cit., II, 1900, p. 30. 

 I have seen none of the Blain specimens, but it is quite probable 

 that they are to be referred to some of the more recently described 

 species enumerated above. 



Family ARACE^. 

 Key to the Species Enumerated. 



Leaf-blade ovate-oblong, with cordate base and acute apex, 1.5-3.5 dm- long. 



184. Philodendron Krebsii. 

 Mature leaf-blades pinnatifid to one-fourth the transverse diameter, deeply cordate. 



185. Philodendron lacerum. 



184. Philodendron Krebsii Schott. 



Philodendron Krebsii Schott, Bonplandia, 1859, p. 164. 



Philodendron Wrightii Grisebach, Catalogus Plantarum Cubensium, 1866, p. 219. 



Clambering over the rocks on the highest point of Caballos Mts., 

 May 13, 1 910, 0. E. Jennings, No. 2j6. General Distribution: 

 Cuba, Isle of Pines, Porto Rico, Hispaniola, and St. Thomas. 



My collection embraced only sterile specimens, but the leaf- and 

 stem-characters agree so closely with those given for Philodendron 

 Krebsii that I have no hesitation in referring the specimens to that 

 species. 



The petiole is little or not at all sheathing at the base, and is sub- 

 terete, slightly flattened on the upper side, reaching a length of 

 8-10 cm. The lamina is 10-18 cm. long, the upper two-thirds being 

 oblong, about 3-4 cm. wide, with an abrupt acumination, the basal 

 one-third of the lamina being rounded, rather deeply cordate, 6-8 

 cm. wide, the basal three or four pairs of the primary veins being 

 slightly stronger than the secondary veins. 



185. Philodendron lacerum (Jacquin) Schott. 



Arum lacerum Jacquin, Plantarum Rariorum Horti Caesarei Schoenbrunnensis 



Descriptiones, etc., IV, 1804, pi. 468. 

 Caladium lacerum Willdenow, Species Plantarum, IV, 1805, p. 491. 

 Philodendron incisco-crenatum Kunth, Enumeratio Plantarum Omnium, III, 1844. 



p. 449. 

 Philodendrutn lacerum Schott, Meletemata Botanica, I, 1832, p. 19. 



On trees and rocks at the top of Caballos Mts., east of Nueva Gerona, 

 May 13, 1910, 0. E. Jennings, No. 235. General Distribution: Cuba, 

 Isle of Pines, and Jamaica. 



