132 Proceedings of the Biological Society of Washington. 



Related to both V. corymbosa Correa and V. karvrinskyi Maxim. The 

 former differs in its narrow, long-petiolate leaves, whose blades are very 

 acute or attenuate at the base; and the latter is distinguished by its very 

 broad leaves with blades truncate or very obtuse at the base. 



Vauquelinia angusti/olia Rydb. was published in 1908* as a segregate 

 from V. corymbosa . It is said to be distinguished from the latter by its 

 shorter petioles and the presence of pubescence on the interior surface of 

 the hypanthium. Examination of material of both species convinces the 

 present writer that there is no essential difference between them. The 

 length of the petioles exhibits great variation upon a single plant, and 

 the hypanthium is always sericeous within. Material from Hidalgo, the 

 type locality, differs somewhat from the original illustration of V. corym- 

 bosa, but not essentially, apparently. This species was reported by 

 Rydberg only from Mexico, but there is a specimen in the National 

 Herbarium collected somewhere in western Texas by V. Havard in 1880. 



Vauquelinia australis Standley, sp. nov. 



Branchlets finely but loosely tomentulose; petioles 5-8 mm. long; leaf 

 blades narrowly elliptic-oblong, 3.5-6 cm. long, 1-1.6 cm. wide, acute or 

 acutish at the base, rounded or very obtuse at the apex and mucronate, 

 finely serrulate, green and lustrous on the upper surface, glabrous or 

 sparsely tomentulose, pale beneath with a fine yellowish tomentum ; 

 corymbs many-flowered, 3.5-4 cm. broad, short-pedunculate; calyx 

 sparsely tomentulose outside, the lobes ovate-oval, acutish; petals subor- 

 bicular, 3.5 mm. long. 



Type in the U. S. National Herbarium, no. 840627, collected on Cerro 

 de Paxtle, vicinity of San Luis Tultitlanapa, Puebla, Mexico, April, 1908, 

 by C. A. Purpus (no. 2729a). 



The only other species with a persistent tomentum on the lower surface 

 of the leaves is V. californica, but in that the leaves are larger, more 

 narrowed at the apex, on much longer petioles, and with a very fine and 

 dense white tomentum. 



Vauquelinia pauciflora Standley, sp. nov. 



Tree ; branchlets finely and rather loosely tomentulose ; petioles 3-6 mm. 

 long; leaf blades narrowly lance-oblong, 3-4 cm. long, 6-11 mm. wide, 

 obtuse or acutish at the base, somewhat narrowed to the acute or acutish 

 apex, finely serrulate, lustrous above, sparsely tomentulose, glabrous 

 beneath when expanded but probably tomentulose when young; corymbs 

 few-flowered (flowers 10 or fewer), nearly sessile, the flowers short-pedi- 

 cellate; fruit densely tomentose. 



Type in the U. S. National Herbarium, no. 234626, collected in Guada- 

 lupe Canyon, northeastern Sonora, Mexico, altitude 1380 meters, October 

 3, 1893, by E. A. Mearns (no. 2535). Obtained at the same locality, 

 Aug. 28, 1893, by E. C. Merton (no. 2063). 

 •N. Amer. Fl. 22: 260. 



