160 Mr. Bentuam on the Structure and Affinities 
petiolis abbreviatis, foliolis obovatis oblongisve obtusis muticis basi an- 
gustatis rigidis marginatis reticulatis glabris subciliatis. 
Ad Rio Pardo Brasiliæ. (v. s. comm. a Mus. Acad. Petrop. cum fl. g). 
Radix apice in tuberculum oblongum inflata. Stipulæ infimæ (sub terra 
. natze ?) aphyllæ, superiores longe rigide ciliate. 
Amongst the above species I have seen the fruit of A. kypogæa only. It is 
probable that when the legumes are known, better distinctive characters may 
be found, or possibly that some of the above may be mere varieties of each 
other, but as far as my specimens go they appear perfectly distinct. 
STYLOSANTHES. Linn. 
Flores polygami. Floris hermaphroditi. sepissime sterilis; calyx tubo longo, 
filiformi, limbo profunde bilabiato, labio superiore 4-fido, laciniis supremis 
. altius connatis, labio inferiore elongato, integro. Corolla fauci calycis in- 
serta. Vexillum suborbiculare. Ale oblongæ, liberæ, leviter. transver- 
sim plicatæ, carina longiores. Carina incurva, subrostrata, apice integra. 
Stamina monadelpha. Antherœ alternæ subrotundæ, medifixæ ; alternæ 
oblongæ, adnatæ. Ovarium intra tubum calycis subsessile, minutum, 2—3- 
ovulatum. Stylus ad antheras attingens, filiformis. Stigma minutum, rarius 
subcapitatum (floribus tunc fertilibus?). Floris feminei fertilis; calyx, 
corolla, et stamina nulla. Ovarium subsessile, erectum, biovulatum. Stylus 
brevis, uncinatus. Stigma incrassatum, subterminale. Legumen sessile, 
stepius biarticulatum, articulis compressis, inferiore nunc sterili stipiti- 
formi, nunc monospermo secedente, superiore monospermo secedente, 
apice stylo persistente hamato. Semen lenticulari-compressum. Seia 
brevis, parum inflexa. 
Her ba, suffruticesve erectæ, vel prostrate, sæpe viscose. Folia petiolata, pin- 
natim trifoliolata, foliolis oppositis, cum impari sæpissime distante, rarius 
inter lateralia subsessili. Stipule basi petiolo adnate, striate. Stipella 
nulle. Flores in spicam densam, axillarem vel terminalem sæpius ap- 
proximati, singuli ad axillam folii vel bracteæ stipularum parisimilis bre- 
viter pedicellati, pedicello bracteæ adnato, nunc solitarii 2—3-bracteolati, 
nunc bini altero perfecto altero abortivo stipitiformi, rarius bini utroque 
perfecto. 
