FLORA OF MADAGASCAR. 111 
than the calyx; filaments flat, twice as long as the oblong 
anthers. Style not more than 4 line long, straight, with an 
oblique capitate stigma. Fruit of three samaræ, with no trace of 
any wing but the dorsal one, which is rather curved and an inch 
long.— Bonatue Bay, Bojer! Central Madagascar, Baron 721! 
MICROSTEIRA, genus novum Malpighiacearum. 
(Tab. XXIII. figg. 1-8.) 
. Flores abortu polygamo-dioici. Calyx parvus, 5-partitus, eglandulosus, 
segmentis oblongo-lanceolatis. Petala 5, oblonga, integra, obscure ungui- 
culata. Flores maseuli—stamina 10, omnia perfecta, petalis paulo bre- 
viora, filamentis filiformibus glabris, antheris oblongis. Flores foeminei— 
stamina rudimentaria producta; ovarium triquetrum, triloculare, stylis 
brevibus filiformibus curvatis divaricatis apice stigmatoso dilatatis. Car- 
pella fructifera 3, samaroidea, ab axi secedentia, alis 3 oblanceolato-oblongis 
coriaceis glabris venosis, dorsali patula minore, lateralibus ascendentibus 
majoribus.—Frutex volubilis Madagascariensis, ramulis apice ferrugineo- 
pilosis, foliis oppositis petiolatis membranaceis, floribus in umbellas 
copiosas laterales pedunculatas dispositis. 
M. Curtisu, Baker. 
A forest-climber, with stems 30 feet long, with terete sca- 
brous slender branchlets, ferrugineo-pilose only at the young 
tips. Leaves opposite, contemporary with the flowers, exstipu- 
late; petiole eglandular, ferrugineo-pilose ; blade oblong, acute, 
rounded at the base, 2-3 in. long, about an inch broad, green 
and glabrous on both sides when mature, ferrugineo-pilose in 
a young state. Flowers in very copious umbels on short erecto- 
patent ferrugineo-pilose peduncles, 8-10 to an umbel ; pedicels 
straight, ascending, i-j in. long, without any bracteoles, the 
basal bracts minute, deltoid. Calyx under a line long, densely 
ferrugineo-pilose. Petals pure white, oblong, over j in. long, 
obtuse, obscurely and unequally unguiculate. Male flowers 
without any perceptible ovary, the ten stamens nearly all per- 
fect and not much shorter than the petals. Ovary in the female 
flower hispid, 3-lobed, with three divaricating styles about half 
a line long, capitate at the oblique stigmatose tip. Fruit-carpels 
glabrous, with two glossy green oblanceolate-oblong obtuse as- 
cending side-wings about half an inch long, and a much smaller 
one of the same shape on the back. 
This is a well-marked new genus of the tribe Hirer. It was 
first gathered by Mr, Curtis, who travelled in the island on 
