164 Annals of the Carnegie Museum. 



Some of the flat-topped inflorescences are composed of as many as 

 fifty flowers, several of which are usually in bloom at once and, on 

 account of the bright scarlet color, they make the plant quite striking. 

 The flowers vary somewhat in color, some of them showing a tinge 

 of yellow. Added to the striking character of the flowers, the bright 

 green oblanceolate leaves, towards the lower part of the branches, 

 have an unusual form. They usually swing out at the base into one or 

 two sharply acuminate lobes. 



392. Jatropha angustifolia var. glauca (Grisebach) Pax. 



Jatropha glauca Grisebach, Nachrichten Kgl. Gesellschaft der Wissenschaften, 



Gottingen, 1865, p. 170. 

 Jatropha angustifolia var. spathulacea Mueller- Aargau, in DeCandolle, Pro- 



dromus Systematis Natiiralis Regni Vegetabilis, "X-V, (2), 1866, p. 1093. 

 Jatropha angustifolia var. glauca Pax, in Engler, Pflanzenreich, IV, (147), 1910, 



p. 52. 



In an arroyo in the pine-barrens, near Los Indios, May 17, 1910, 

 0. E. Jennings, No. jji; in low pine woods north of Los Indios, 

 May 19, 1910, 0. E. Jennings, No. 667. General Distribution: West- 

 ern Cuba and the Isle of Pines. 



393. Jatropha angustifolia var. genuina Mueller-Aargau. 



Jatropha angustifolia var. genuina Mueller-Aargau, in DeCandolle, Prodromus 

 Systematis Naturalis Regni Vegetabilis, XV, (2), 1866, p. 1093. 



On the white sand of the pine-barrens at Los Indios, May 17, 

 1910, 0. E. Jennings, No. 320; near the Majagua River, north of Los 

 Indios, May 19, 1910, 0. E. Jennings, No. 666. General Distribution: 

 Western Cuba and the Isle of Pines. 



The flowers and fruit of the two varieties are identical in character, 

 but the shape of the leaves is so strikingly different that were it not 

 for occasional transitional forms one would have good reason for 

 regarding them as distinct species. The plants are low, usually not 

 over two or three feet high, simple or sparsely branched, woody, par- 

 ticularly below, and at the base there is often an enlarged woody 

 stem, just underneath the soil, often an inch or more in diameter. 



The flowers are not so brilliantly scarlet as are those of Jatropha 

 glaucovirens, the color ranging from a purplish or rose pink to a pure 

 white. In some localities only white ones were seen. 



