46;i NATURAL HISTORY OF PLANTS. 



GENEKA. 



& 



1. MALPIGHIE^. 



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

 ceptacle cupuliform subplane. Sepals 5, inserted at margin of 

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

 externally into 10 distinct subequal, or unequal and scarcely distinct 

 glands ; prtefloration imbricate or sub-valvate. 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 

 regards the funicle lateral. Nuts 1-3, each shortly and thickly 

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

 minous embryo fleshy complanate convolute ; interior longer sjjirally 

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

 leaves opposite entire subcoriaceous venose ; stipules exarillate ; 

 flowers axillary in subumbollate or fasciculate cymes ; pedicels oftener 

 bracteate and at base 2-bracteolate. {Brazil.) See p. 429. 



2. Acmanthera Griseb.^ — Fl owers nearly oi Pterandra ; calyx 

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

 glabrous ; cells externally alate ; connective produced beyond cells 

 to a recurved lamina. Carpels 3, mature utriculiform,^ finally 

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



1 Jf ART. Fl. Bras. Malpigh. 28.— B. H. Gei>. - Base with receptacle hirsute. 



'25.'!, n. 8. ^ Apex sericeo-comose. 



