Desmos monogynus sp. nov. Horn QAR.L3: 163. /942 
Frutex 5-6 m. altus, perspicue subcastaneo-villosus, ramis vetustioribus 
glabris, ramulis dense villosis, circiter 2 mm. diametro; foliis oblongis, 
chartaceis, 11-17 cm. longis, 3.5—-6 cm. latis, in sicco supra pallidis, glabris, 
subtus subcastaneo-brunneis, praesertim secus costam nervosque dense villo- 
sis, apice breviter acuminatis, basi rotundatis et minute cordatis; nervis 
primariis utrinque 13-15, supra haud distinctis, subtus elevatis, perspicuis, 
circiter ad marginem arcuato-anastomosantibus; petiolo dense villoso, 
crasso, 3-4 mm. longo; floribus axillaribus, solitariis, brevissime pedicella- 
tis; sepalis triangulari-ovatis, obtusis, circiter 6 mm. longis et 5 mm. latis, 
intus glabris, extus adpresse hirsutis, margine ciliatis; petalis lanceolatis 
circiter 3 cm. longis, extus adpresse villosis, intus glabris, exterioribus 8 mm., 
interioribus 10 mm. latis, sursum angustatis, obtusis; staminibus numerosis, 
cuneatis, 2 mm. longis, connectivo obliquo, truncato, cellulis extrorsis; car- 
pellis solitariis, oblongis, 3 mm. longis, plus minusve compressis, adpresse 
hirsutis, sursum leviter angustatis; stigmatibus sessilibus, depresso-globo- 
sis, leviter hirsutis; ovulis 2-seriatis, numerosis; fructibus dense subcas- 
taneo-pubescentibus, ad 6 cm. longis et 2 cm. diametro, seminibus 2, inter 
se leviter constrictis. 
Ixpo-CxinA, Tonkin, Sontoy Province, Mount Bavi, Pételot 2597, Aug. 28, 1940, in 
open humid forests, alt. 200 m. 
This species is somewhat anomalous in the Annonaceae in its mono- 
carpellate flowers, although occasionally one finds species in various genera 
with single carpels, and is likewise anomalous within the genus Desmos 
Lour. (Unona auctt. non Linn.) not only in this character but also in its 
sessile depressed-globose, somewhat haïiry stigmas, and much thickened 
fruits which are only slightly constricted between the two seeds. While it 
seems probable that ultimately it may be desirable to establish a new genus 
for this rather striking form, in view of the slight amount of material avail- 
able (a single flower dissected) it seems best to place it in Desmos for the 
present. It is not closely allied to any previously described species in 
this group. 
