NATURAL HISTORY OF PLANTS. 



GENERA. 



1. MALPIGHIE^. 



1. Pterandra A. Juss. — Flowers hermaphrodite regular; re- 

 ceptacle cupuliform subplane. Sepals -5, inserted at margin of 

 receptacle and more or less confinent with it at the base, thickened 

 externally into 10 distinct snbeqnal, or unequal and scarcely distinct 

 glands ; prfefloration imbricate or sub-A^alvate. Petals 5, unguicu- 

 late, externally pubescent, imbricate. Stamens 10, inserted in 2 

 series with the perianth ; filaments free or connate at the 

 base ; the alternipetalous longer ; anthers introrse glabrous ; cells 

 externally winged, longitudinally rimose ; connective beyond cells 

 somewhat thickened obtuse. Carpels 3 ; germen subfree ; styles 

 ventral sub-basilar free subulate to stigmatose apex ; ovule in cells 

 1, inserted in internal angle, arcuate ; micropyle superior, finally as 

 reo;ards the funicle lateral. Nuts 1-3, each shortly and thickly 

 stipulate ; seed globose ; testa membranous ; cotyledons of exalbu- 

 minous embryo ficshy complanate convolute ; interior longer spirally 

 circinate ; radicle superior short. — Small sericeo-tomentose trees ; 

 leaves opposite entire subcoriaceous venose ; stipules exarillate ; 

 fiowers axillary in subumbellato or fasciculate cymes ; pedicels oftener 

 bracteate and at base 2-bracteolate. (Brasil.) See p. 429. 



2. Acmanthera Geiseb.i — Fbwcrs nearly of Pterandra ; calyx 

 widely 10-glandulose. Stamens 10; filaments subdistinct ;^ anthers 

 glabrous ; cells externally alate ; connective produced beyond cells 

 to a I'ecurved lamina. Carpels 3, mature utriculiform,^ finally 

 bursting at apex. Testa of subglobose-angular seed coriaceous ; 



• Maiit. FI. Bras. Ualpigh. 28. — B. H. Geii. - Base with receptacle hirsute. 



253, n. 8. ^ Apex sericeo-comose. 



