THE BOTANY OF SOUTH AMERICA. 157 



what flattened above, and of a glaucous hue. The flowers 

 are sessile, and arranged in a branching few-flowered corymb ; 

 the calyx is 3 lines long, the corolla 8 lines in length, funnel- 

 shaped, about 2 lines in diameter, with five rather short, 

 erect teeth ; the filaments, of unequal length, are fixed below 

 the middle of the tube, have a few recurved hairs at base, 

 but are glabrous above ; the ovarium, which rises on a short 

 glandular column, is glabrous, as well as the long, slender, 

 and slightly incurved style ; the stigma is somewhat larger, 

 2-lipped, and inclined; the capsule is shorter and thicker 

 than in the preceding species, being half invested by the 

 persistent calyx, about 6 lines long, 2 lines in diameter, and 

 somewhat curved; there are two seeds matured in each 

 cell, which are broadly winged, with a slender longitudinal 

 keel. The form of the embryo corresponds with that of the 

 first described species. 



Cestrum. 



During my residence in Rio de Janeiro, I found in its 

 neighbourhood and in the Organ Mountains, several species 

 of Cestrum ; and as I do not find them recorded, I will here 

 offer a short diagnosis of their characters. In order to explain 

 the views before proposed, in regard to the distribution of 

 the Rectembryea, and as a term of comparison between this 

 genus and others included in this sub-order, I will first give a 

 somewhat amended character, in accordance with observa- 

 tions made upon several species that I examined in the living 

 state. 



Cestrum, Linn. (char, emendat.)— Calyx parvus, tubulosus, 

 5-fidus, vel 5-dentatus, persistens. Corolla hypogyna, in- 

 fundibuliformis, tubo elongato, superne ampliato, limbo 

 5-partito, patenti vel revoluto, eestivatione conduplicativo. 

 Stamina 5, medio corollae tubo inserta, inclusa, filamentis 

 simplicibus, vel basi dente auctis, antheris longitudinaliter 

 dehiscentibus. Ovarium ovatum, breviter stipitatum, sti- 

 Pite vix glanduloso cyatho (corollas reliquo) circumdato, 



