122 Annals of the Carnegie Museum. 



Chrysobalanus icaco var. minor. The variety was said to be known 

 in the Isle of Pines as " Ycaco negro" and it was described by Richard 

 as having smaller leaves and flowers, with the flowers in fewer num- 

 bers, so that the plants would answer very well to the description of 

 Meyer's Chrysobalanus pellocarpus. 



278. Hirtella mollicoma Humboldt, Bonpland, & Kunth. 



Hirtella mollicoma Humboldt, Bonpland, & Kunth, Nova Genera et Species 

 Plantarum, VII, 1825, p. 263. 



Near Nueva Gerona, December 30, 1903, A. H. Curtiss, No. 260 

 (distributed as Hirtella glandidosa Sprengel) ; along bank of Casas 

 River, near Keenan's estate, south of Nueva Gerona, May 12, 1910, 

 0. E. Jennings, No. 208; northern part of the island, Blain, No. 25. 

 Reported by Millspaugh (Field Columbian Mus., Bot., I, 1900, p. 

 427). General Distribution: Isle of Pines, Colombia. 



Note. A. Richard, in Sagra, Historia Fisica, Politica y Natural de 

 la Isla de Cuba, X, 1845, p. 238, reports for the Isle of Pines, Hirtella 

 nitida Willdenow, based on the collection of A. H. Lanier in 1831. 

 However, Richard's description of Lanier's specimen fits the speci- 

 mens collected by Curtiss and Jennings so closely that there can be 

 little doubt that the three collections are the same species, Hirtella 

 mollicoma Humboldt, Bonpland & Kunth. 



Family MIMOSACE^. 



Key to the Species Enumerated. 



Low rather woody herbs; leaves with one to iive pairs of pinnae; sensitive plants. 



Pinnae in one or two pairs 285. Mimosa pudica. 



Pinnae in three to five pairs 286. Neptunia plena. 



Shrubs or trees, often armed with thorns. 



Valves of the flat and thin pod separating from the continuous margin; stipules 

 about as large as the leaflets (Lysiloma). 

 Stipules obovate, obtuse; leaflets about 10-15 rnm. long and two-thirds as 



wide 283. Lysiloma Sabicu. 



Stipules ovate, acuminate; leaflets about 6-10 mm. long and 2.5-3 mm. 



wide 284. Lysiloma bahamensis. 



Valves of the pod not separating from the margin; stipules inconspicuous 

 (Pithecolobium) . 

 Leaflets 3-6 cm. long. 



Pinnae 3-6 pairs, leaflets finely and softly pubescent beneath; pods 2 



dm. or more long, only moderately curved. . . 280. Pithecolobium soman. 



Pinnae mostly 2 pairs, leaflets sparsely pubescent with minute, straight, 



