Jennings: Contribution to Botany of Isle of Pines. 191 



A. H. Curtiss, No. jSg. General Distribution: Western Cuba and 

 the Isle of Pines. 



Urban (Synibolce AntillancE, I, 1899, pp. 368-369) has described as 

 Rheedia portoricensis a plant of Porto Rico very closely related to 

 R. aristata, but having the petioles 5-8 mm. long, instead of 2-3 mm., 

 lateral nerves 25-35, instead of 15-20, and pedicels 2-3 cm. long, 

 instead of but 1-1.5 cm. Curtiss's specimen from the Isle of Pines 

 is intermediate in most characters; the petioles often reach 5 mm. in 

 length, the lateral nerves on the larger leaves are between 20 and 25 

 in number, and the longer pedicels reach a length of over 2 cm. 

 Further study of more extensive collections will probably show good 

 reasons for regarding Rheedia portoricensis as a variety of R. aristata. 



472. Clusia rosea Jacquin. 



Clusia rosea Jacquin, Enumeratio Systematica Plantarum, 1760, p. 34. 



A small tree about fifteen feet high, growing on the bank of an arroyo 

 south of Nueva Gerona, May 12, 1910, 0. E. Jennings, No. iq6; 

 February-March, 1910, no locality given, Jared F. Shafer. General 

 Distribution: The Bahamas, most of the larger West Indian islands, 

 Panama, and Venezuela. 



Family FLACOURTIACEyE. 



Key to the Species Enumerated. 



Shrub or small tree with flowers about 4 cm. long; leaves oblong, obtuse, often 

 retuse, the uppei surface shining and pebbly-roughened. 



473. Samyda grandijlora. 



Shrubs or trees; flowers small, less than 10 mm. long; leaves acuminate or mucro- 



nate (^Casearia). 



Branchlets and under surface of leaves softly and densely brownish-pubescent. 



Calyx-lobes about 5-6 mm. long; shorter branchlets not ending in a spine. 



476. Casearia hirsuta. 

 Calyx-lobes somewhat shorter; shorter branchlets often aculeate. 



475. Casearia aculeata. 

 Branchlets and under suiface of leaves glabrous, or, it hairy, scarcely softly 

 and densely pubescent. 

 Plants essentially glabrous; calyx-lobes about 1.5 mm. long. 



474. Casearia sylveslris. 



Plants, especially the flowers, younger branchlets and petioles, pubescent; 



calyx-lobes somewhat longer 475. Casearia hirta = C. aculeata. 



