128 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. ii4. 



Family CUNONIACEAE. 



Genus WEINMANNIA Linnaeus. 



WEINMANNIA BRITTONI Engelhardl. 



Plate 15, fig. 12. 



Weinmnnnia brittoni Englehardt, Sitz. Naturw. Gesell. Isis in Dresden, 1894, 

 Abh. 1, p. 6, pi. 1, fig. 16. 



Description. — Leaflets small, sessile, ovate or obovate in general 

 outline, with a narrowed acuminate base and a broadly rounded apex. 

 Margins with a few relatively large serrate teeth in the upper part, 

 entire toward the base. Texture coriaceous. Length, about 1 cm. 

 Maximum width, in the middle part of the leaflet, about 5.5 mm. 

 Midrib stout, slightly curved. Secondaries thin, few in number, 

 subparallel, diverging from the midrib at angles of about 45°, 

 craspedodrome. 



This small species was described from Potosi by Engelhardt and is 

 apparently unrepresented in the other collections. It was compared 

 with the existing Adesmia muricata De Candolle (Leguminosae), but 

 more particularly with Weinmannia glabra De Candolle, a species 

 found from the West Indies and southern Mexico throughout northern 

 South America (Colombia, Venezuela, Guiana.) 



The genus Weinmannia contains about 75 existing species of 

 shrubs or trees, of which over half are confined to temperate and 

 tropical South America and not uncommon in the warmer parts of 

 the Andean region. The remaining species are found in Madagascar, 

 Australia, New Zealand, and Oceanica. Upwards of a score of fossil 

 species have been described, mostly from Europe and North America, 

 and well-preserved and undoubted forms are present in the Miocene 

 lake deposits at Florissant, Colorado. 



WEINMANNIA POTOSINA (Britton). 



Plate 15, fig. 13. 



Myrica potosina Britton, Trans. Amer. Inst. Min. Eng., vol. 21, 1893, p. 258, 

 figs. 9, 10. 



Description. — Leaflets sessile, lanceolate in outline, with an acute 

 apex and a more or less inequilateral rounded to cuneate base. Mar- 

 gins finely serrate, entire at the base. Texture subcoriaceous. 

 Length ranging from 1.5 to 2.25 cm. Maximum width, midway 

 between the apex and the base, ranging from 5 to 7 mm. Midrib 

 stout, prominent, more or less curved. Secondaries thin but promi- 

 nent, numerous, regularly spaced, subparallel, craspedodrome. 



This species, at first regarded as a Lomatia, was described from 

 Potosi by Britton as a new species of Myrica. It was apparently 

 unrepresented in the collections studies by Engelhardt, but is repre- 

 sented by two specimens in the collections studied by me. I can not 



