372 safford: classification of rollinia 



shown. The outer corolla lobes may be: (a) compressed, widely 

 'spreading, and more or less ascending or upcurved, as in Rollinia 

 mucosa (Jacq.) BailL; (b) decurved and obtuse or rounded at 

 the extremity, as in Rollinia deliciosa and R. Pittieri, to be 

 described below; (c) erect or ascending and incurved, as in 

 Rollinia orthopetala A. DC. and R. laurifolia Schlecht.; (d) 

 obovate and ascending, as in Rollinia rugulosa Schlecht.; (e) 

 short, thick, and spur-like, as in Rollinia lanceolata R. E. Fries; 

 or (f) suborbicular or broadly obovate and widely spreading, as 

 in Rollinia emarginata Schlecht. 



FRUITS OF ROLLINIA 



In the genus Rollinia the fruit is a fleshy syncarpium, composed 

 of a number of one-seeded carpels which become fused into a 

 solid spheroid or ovoid head. In some cases the surface of the 

 fruit is distinctly areolate, as in R. mucosa, the areoles being 

 marked by pentagonal or hexagonal outlines and bearing mamil- 

 late projections. These may point outward, or be recurved 

 toward the stem, or curved toward the apex of the fruit; or the 

 areoles may be gibbous or rounded and very distinct, like those 

 of the sugar-apple, Annona squamosa; or they may terminate in 

 a blunt point. In a few species, as in Rollinia glaucescens, the 

 surface of the fruit is nearly smooth, like that of the common 

 A. reticulata. 



The species in which the mature carpels are quite distinct and 

 fall off separately from the indurated receptacle, or torus, have 

 been set apart by the writer under the generic name Rolliniopsis. 2 



BOTANICAL CLASSIFICATION 



The groups suggested above, based upon the form of the 

 flowers, cannot be regarded as subgenera or even as sections, for 

 the line of demarcation is not always sharply drawn. In some 

 species, for example, the corolla lobes may be ascending or nearly 

 erect at first, and at length more widely divergent; while in 



2 Rolliniopsis, a new genus of Annonaceae from Brazil. Journ. Wash. Acad. 

 Sci., 6: 197. 1916. 



