216 STUDIES IN GKOLOGY, No. 4 



Family MIMOSACE^ 



Genus CALUANDRA Bentham 



Calliandra jancocatana Berry, n. sp. 



PLATE I Fig. 3, 3a 



Leaflets small, ovate in outline, markedly inequilateral, 

 bluntly pointed at the apex, broadly and very inequilaterally 

 rounded at the base. Margins entire, full and evenly 

 rounded. Texture coriaceous. Length about I centimeter. 

 Maximum width about 4 millimeters. Midrib stout, slightly 

 curved. Secondaries thin ; those in the narrower half of the 

 lamina diverging at wide angles and camptodrome; those 

 in the wider half of the lamina are somewhat less regular, 

 occasionally inosculating and the lowermost is somewhat 

 stouter and ascending at least half way to the tip. 



The present species shows considerable similarity to Calli- 

 andra obliqua Engelhardt which is common at Potosi and 

 Corocoro. 7 The Jancocata plant appears, however to repre- 

 sent a distinct but closely related species. It is also some- 

 thing like Enter olobmm grandifoliiim which is found fossil 

 at both Potosi and Corocoro. 8 The modern species of Calli- 

 andra number over one hundred varieties of shrubs and small 

 trees, largely confined to the humid tropics of South America. 

 The genus is represented in the montana country of Bolivia, 

 but does not extend westward beyond the sub-andean slopes 

 of the Cordillera Real. 



Family 



Genus CASSIA Linne 



Cassia altcensis Berry sp. no\. 



PLATE I Fig. 2 



Small, ovate, compressed, few seeded, ligneous pods, about 

 2.5 cm. to 3 cm. in length, and 2 cm. in maximum width, 



7 Berry, E. W., Johns Hopkins Studies in Geology, No. i, p. 97, pi. 

 4, 1922. 



8 Idem., p. 98, pi. 7, fig. 16. 



