SCHOMBURGK’S GUIANA PLANTS. 89 
(Mem. sur les Leg. p. 406), in all the specimens I examined 
perfectly agree, clearly indicating its place among Dalber- 
gieæ, where it must form a distinct genus, allied probably to 
Dipteryz, but differing especially in the calyx and other 
characters. 
The two following Swartzie, both new, form a very dis- 
tinct section, or perhaps a genus, for which I should propose 
the name Dithyria. The calyx is ovate, membranous, and 
splits into two entire valves; there is one or sometimes two 
petals present, the stamens are all nearly alike with very long 
anthers, the ovary almost sessile with numerous ovules, and 
a long style with a capitate stigma. 
S. alterna; petiolo aptero juniore puberulo, foliolis 4—7 
alternis ovatis acuminatis basi angustatis glabris subcoriaceis, 
racemis brevibus laxis, pedicellis ebracteatis, calycibus glabris 
Y. vix puberulis ovatis membranaceis per anthesin bipartitis 
reflexis, petalis 1—2 longe stipitatis, staminibus circa 15 
subsessilibus, antheris linearibus, ovario sessili glabro, stylo 
elongato, stigmate late capitato.— Foliola adulta 3—4-polli- 
caria.— Barra do Rio Negro in Brasilia. Comm. ab Acad. 
Imp. Petropol. | 
S. mollis; petiolo aptero ramisque tomentoso-lanatis, foli- 
olis 5—7 suboppositis ovatis obtusis junioribus utrinque mol- 
liter pubescentibus, racemis brevibus paucifloris, pedicellis 
elongatis ebracteatis calycibusque membranaceis ovatis mol- 
liter pubescentibus, petalo unico longe stipitato, staminibus 
circa 20 subsimilibus, antheris linearibus, ovario subsessili 
glabro, stylo elongato, stigmate late capitato.—Foliola adulta 
non vidi. Legumen glabrum, semipollicare, ventricosum, 
valvalis 2 coriaceis dehiscens, ut videtur pleiospermum at 
semina omnia delapsa.— Utinga, Prov. Bahia. Blanchet, 
n, 2774. 
220. S. (Tounatea) microstylis; petiolo subnudo, foliolis 
eS ovali-oblongis acuminatis coriaceis glabriusculis, racemis 
_ Sübramosis axillaribus ramealibusve tomentosis,"petalo unico 
. &alycem coriaceum sequante, staminibus majoribus 3, minor- — - 
ibus numerosis, ovariis binatis tomentosis, stylo minuto de- - 
