90 SCHOMBURGK'S GUIANA PLANTS. 
flexo.—Arbor. Rami glabriusculi. Petioli 4-—5-pollicares 
supra subangulati. Stipellee divaricate acute breves, supe- _ 
riores interdum breviter decurrentes. Foliola 2—4 poll 
longa. Racemi 4—6 poll. Bractez minutze, bracteole nulle. 
Calyces tomentosi, magnitudine Pisi, valde inzequaliter rupti. 
Petalum orbiculatum acuminatum. Stamina majora calycem 
æquantia cum ovariis alternantia. Ovaria valde declinata. 
—On the Rio Quitaro, Schomburgk, n. 578. 
I would comprise in the section Tounatea, all the species | 
with the peculiar ovary described by De Candolle, whether — 
with or without the petal. It would include amongst petali- - 
ferous species, (besides the above S. microstylis,) the S. acuti- 
folia, (Vog.), to which may perhaps be referrible Mimosa 
Pacoba, (Vell. Fl. Flum. XY. t. 20.) ; S. Flemmingii, (Raddi 
or S. montana, (Vogel); S. multijuga, (Vogel); and amongst 
those I have not seen probably also S. lomatopus, (Mart.); | 
and S. dipetala, (Willd.) ; to which Vogel thinks S. dicarpa, — 
(Moric.), may be referred: This species is evidently near my P 
S. microstylis; but neither Vogel's nor Meissner's descriptions — 
agree with Schomburgk's plant sufficiently to induce me to 
unite them. | 
_ Amongst the apetalous species of the same section Touna- 
tea, the following new one is from Claussen’s collection. 
S. pilulifera; petiolo anguste marginato, foliolis 5 oblongis 
obtuse acuminatis emarginatisve basi angulatis coriaceis supra 
glabris nitidis subtus leviter tomentosis, racemis axillaribus 
terminalibusque laxe multifloris, calycibus pedicellisque villo- 
sis, petalo nullo, staminibus majoribus 2, minoribus numero- 
sis inequalibus, ovario sericeo-villoso, stylo brevissimo deflexo- 
— Foliola 14—2 poll. Racemi 3—4 poll. Bractex minute | 
bracteole nulle. Pedicelli 3—4 lin. Calyces magnitudine — 
grani Piperis. Legumen ovoideo-globosum pubescens semis | 
pollicare, stipite 2 lin. longa. | p 
_ The other apetálous species are S. glabra ( Vogel), S. pin- 
nata (Willd.), and S. apetala (Raddi), and probably also 
S. sericea (Vogel), and Mimosa laza (Vell. Fl. Fium. v. XL. 
¢. 25), neither of which I have seen. From the figure of the 
