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MONOGRAPH OF AMPHICARPA AND AKIN GENERA. 

 OF THE GROUP TETRODES. 



G. AMPHICARPA Elliot. The Genus 

 Glycine of Linneus, a strange medley of species 

 without common characters, is now divided in 

 many Genera requiring yet discrimination and 

 revision. As early as 1804 I had proposed to 

 Muhlenberg the Genus Tetrodea for Gl. mo- 

 nolca, comosa, subterranean having a tubular 

 4toothed calix, and I indicated this G. in 1808. 

 But in 1818 Elliot established with them his G. 

 Amphicarpa,whichhRs been generaly received. 

 Decandole wrongly spells it amphicarpea. but 

 as each of these 3 sp. may be the type of a pe- 

 culiar Genus, I shall now revise it and add sev- 

 eral sp. 



Amphicarpa Calix tubular sub campanulate, 

 base obtuse or gibbose, 4 teeth acute subequal. 

 Petals equal oblong keel obtuse, wings Itoothed 

 vexillum adpressed or incumbent. Stam 9-1. 

 Stigma capitate. Pod stipitate, oblong, com- 

 pressed acuminate by the style, 3-4 seeds sub- 

 reniform. Sometimes the lower flowers soli- 

 tary without petals nor stamens, perfect fl, 

 racemose and hracteolate. Perennials, 



LoBOMON Raf. cahx campanulate, base acute, 

 unequaly 4toothed. Petals and stamens as 

 above, but commonly apetalous flowers dioical 

 or monoical, with 5 minute sessile united an- 

 thers. Pod flat semi ovate acute, without style, 

 one side strait, 2 seeds lenticular. Annuals 

 Flowers axillary, not racemose, no bracts, 

 (Name ancient.) 



Geolobus Raf. calix campanulate, 4fid, up- 

 per segment notched. Petals unequal, keel and 

 wings oblong, vexillum obovate striate notched. 

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