158 Mr. Bentham on the Structure and ^Iffinlties 



than with f^kla, Centrosema, Tr'ifoUum, or others, and in other respects the 

 two genera are very different. I have no perfect flowers in my specimens of 

 f^oandzeia, but they are not described as having the long calycine tube of 

 Arachls : the fertile flowers have a calyx though they have no corolla, and the 

 legume, though indéhiscent from being subterraneous, has the sutures very 

 prominent, and is not reticulated. The foliage, stipules, and inflorescence 

 are entirely those of PhaseolefP, to which tribe I should follow Ernest Meyer 

 in referring it, although the want of the perfect flowers prevents me from 

 ascertaining to which section of that tribe it approaches the nearest. Apeta- 

 lous flowers are common in Phaseolecc, as, for instance, in the genera Galactia, 

 Glycine, Ampliicarpcea, Neurocarpum, Centrosema. &c. 



The following are the distinctive characters I should propose for the genera 

 Arachls and Stylosanthes, to which I subjoin a synopsis of the species of 

 Arachis. 



Arachis. Linn. 



Flares polygauii. Floris hermaplirnditi sterilis : ca/i/.r tubo longo filiforu)!, 

 limbo subbipartito, labio superiore breviter 4-dentato, inferiore tenui 

 integro. Corolla fauci calycis inserta. f'exilhan suborbiculare. AUe 

 oblonga?, libera% transversim leviter |)licatœ. Carina incurva, rostrata. 

 Stamina monadclpha vexillari interdum aborticnte. Antherce alternai 

 subrotundœ, meditixœ ; alternée oblongte, adnata'. Ovarium intra tubuin 

 calycis su])sessile, minutum, 2 — 3-ovulatuni. Stylus ad antheras attingens, 

 filiformis. Stigma minutum vel nullum? Floris fœminei fertilis : calyx, 

 corolla et stamina nidla. Ovarium toro mox elongato reflexo rigido sti- 

 pitatum, et cum eo continuum, acutuin, intus uniloculare, simplici série 

 2 — 3-ovulatum, ovulis ovoideis anatropis. Stylus brevissimus, subnullus. 

 Stigma subdilatatum, terminale. Legumen intra terram maturescens, 

 oblongum, crassum, reticulatum, indehiscens, sul)torulosum, 2 — 3-sper- 

 muMi. Semiua irregulariter ovoidea, cotyledonibus crassis carnosis, ra- 

 dicula recta brcvi. 



Herhœ humiles, sœpè prostratee. Folia petiolata, abrupte pinnata, ecirrhosa, 

 foliolis oppositis bijugis. Stipula' basi pctiolo atbiatse, striate. Stipellœ 

 nullre. Flores in spicam densam axillarem seepius approximati, singuli 



