160 Mr. Bentham on the Structure and Affinities 



petiolis abbreviatis, foliolis obovatis oblongisve obtusis muticis basi an- 

 gustatis rigidis marginatis reticulatis glabris subciliatis. 



Ad Rio Pardo Brasilise. (v. s. comm. a Mus. Acad. Petrop. cum fl. ? ). 



Radix apice in tuberculum oblongum inflata. Stipulce infimee (sub terra 

 natee ?) aphyllte, superiores iongee rigidse ciliatee. 



Amongst the above species I have seen the fruit of A. hypogoea 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 scepissime 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. f^exillum suborbiculare. Alee oblongoe, liberse, leviter transver- 

 sim plicatee, carina longiores. Carina incurva, subrostrata, apice integra. 

 Stamina monadelpha. Antherce alternse subrotundse, medifixge ; alternee 

 oblongee, adnatse. Ovarium intra tubum calycis subsessile, minutum,2 — 3- 

 ovulatum. iS'^y/Msadantherasattingens, filiformis. /S^/^ma minutum, rarius 

 subcapitatum (floribus tunc fertilibus ?). Floris foeminei fertilis ; calyx, 

 corolla, et stamina nulla. Ovarium subsessile, erectum, biovulatum. Stylus 

 brevis, uncinatus. Stigma incrassatum, subterminale. Legumen sessile, 

 seepius biarticulatum, articulis compressis, inferiore nunc sterili stipiti- 

 formi, nunc monospermo secedente, superiore monospermo secedente, 

 apice stylo persistente hamato. Semen lenticulari-compressum. Radicula 

 brevis, parum inflexa. 



Herbce, suffruticesve erectse, vel prostratse, saepe viscosse. Folia petiolata, pin- 

 natim trifoliolata, foliolis oppositis, cum impari saepissime distante, rarius 

 inter lateralia subsessili. Stipulce basi petiolo adnatse, striatse. Stipella^ 

 nullae. Flores in spicam densam, axillarem vel terminalem seepius ap- 

 proximati, singuli ad axillam folii vel bractese stipularum pari similis bre- 

 viter pedicellati, pedicello bracteae adnato, nunc solitarii 2 — 3-bracteolati, 

 nunc bini altero perfecto altero abortive stipitiformi, rarius bini utroque 

 perfecto. 



