8 



Britton: Studies of West Indian plants XII 



Glabrous throughout; leaves rounded at both 



ends or the apex \ ery obi use. 

 Pubesceni or puberulem ; leaves a< ute or 

 bluntly pointed. 

 Leaves suborbicular, very bluntly pointed. 

 Leaves ovate. 



Peduncles and petioles puberulenl ; leaves 



6-8 em. long. 

 Peduncles and petioles tomentulose or 

 pubescent; leaves 3-5 cm. long. 

 Receptacle tomentulose, ciliate; pedun- 

 cle about as long as the petioles. 

 Receptacle puberulent; peduncle much 

 shorter than the petioles. 



<). I), crassipes. 



10. D. erythrandra . 



11. D. Roigii. 



\2. D. confusa. 

 13. D. jamaicensis. 



I. DORSTENIA CONTRAYERVA L. Sp. PI. 121. 1 753 



Porto Rico ; St. Martin ; Guadeloupe ; Martinique ; St. Vincent ; 

 Trinidad; Mexico to Colombia and Peru. 



2. Dorstenia crenulata C. Wright ; Griseb. Mem. Ann. Acad. 



II. 8: 173. i860 



Banks of rivulets, Monte Verde, Cuba, {Wright 1447). 



3. Dorstenia tuberosa C.Wright; Griseb. Mem. Ann. Acad. 



11. 8: 173. i860 



Mountains of northern Oriente, Cuba. 



4. Dorstenia Rocana Britton, sp. now 



Rootstock short. Petioles very slender, tomentulose, 5 cm. 

 long or less; leaf-blades orbicular, membranous, deeply cordate, 

 rounded, entire, or some of them obscurely repand, puberulent 

 on the veins beneath, otherwise glabrate, 10-23 mm. in diameter; 

 peduncle filiform, puberulent, about as long as the petioles; 

 receptacle cyathiform, about 5 mm. long and 4 mm. in diameter, 

 puberulent, narrowed below, purple-margined above. 



Shaded rocks on banks of Cupeyales, Banao Mountains, 

 Santa Clara, Cuba {Brother Leon & Father Roca, 80Q2, August 

 5, 1918). 



5. Dorstenia cordifolia Sw. Prodr. 31. 1788 

 Central and western Jamaica. Recorded from Haiti. 



