60 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
species or to its synonym &. sieberi A. DC. It is fortunate that the type lo- 
ealities of the plants described under the names Anona mucosa, A. obtusifiora, 
and Rollinia sieberi, all of them West Indian, are definitely known, so that 
specimens from the same localities can be carefully compared. It must be borne 
in mind that the fruits of Rollinia are even more important than the flowers and 
leaves in the identification of species, as in the case of Anona reticulata and A. 
squamosa, species which can be distinguished from each other only with diffi- 
culty without specimens of the fruit. 
Very closely related to Rollinia mucosa are R. orthopetala A. DC., from 
British Guiana, and R. pulchrinervia A. DC., from French Guiana, Delicious 
fruits grown at Miami, Florida, from seed received from Paré, Brazil, have 
been transmitted to Mr. David Fairchild, of the Bureau of Plant Industry, at 
Washington, under the name R. orthopetala. But the flowers of R. orthopetala 
(which have never been figured) are described as having their corolla lobes 
erect and incurved, while those of the Miami plants have their lobes widely di- 
verging and decurved toward the peduncle, agreeing in this respect with the 
description of the flowers of R. pul- 
chrinervia, which is said in the original 
description to be very closely allied to 
R. orthopetala, as both of them are also 
said to be to R. sieberi of Trinidad. 
DUGUETIA St. Hil. 
Duguetia was dedicated to the ven- 
erable Abbé Jacob Joseph Duguet, who, 
in his stupendous “ Ouvrage des Six 
Jours (1731), wrote elegantly concern- 
ing the wonders of the vegetable king- 
dom.” The type of this genus is Du- 
guetia lanceolata St. Hil,’ a plant 
growing in meadows at a place called 
Sumidouro, not far from the Villa do 
um 68.—Fruit of Duguetia lanceclata. 1, Principe. The fruit in this genus 
tached; oy ase of torus fiom wien sta, (1-68) differs from that of the genus 
mens have fallen; 0, upper segment of Annona in being composed of dis- 
torus, showing alveolate surface; 2, de- tinctly woody carpels set in sockets or 
tached carpel, Reproduced from St. cavities on the hardened torus or gy- 
Hilaire. nophore, instead of forming a solid 
synearpium by the fusion of the carpels. In the type specimen of the genus the 
flowers were lacking, but these were afterwards found to differ from the flowers 
of Annona in having the petals imbricate instead of valvate in aestivation. Fur- 
ther, the indument of the lower surface of the leaves, petioles, and peduncles in 
this genus is scurfy and stellate-pilose, while in Annona the hairs are simple or 
sometimes fascicled in clusters of 2 to 6. It proved afterwards that Anona fur- 
furacea St. Hil. (figs. 69, 70), described and figured in the same work in which 
it was published, had to be included in the genus Duguetia. Many species have 
since been added to this genus, all of which appear to have the new parts clothed 
with stellate pubescence or tomentum. 
Duguetia was regarded by Baillon as a synonym of Aublet’s Aberemoa, and 
Robert E. Fries transferred all the species of Duguetia known to him to this 
4 ‘2 
"Fl. Bras. Merid. 1: 35. pl. 7. 1825. 
