IS^ tENTANDRIA. DIGYNIA, 



Species. 1. ./?. androscemifoHum- 2. cannabhnim. o, 

 hyperid folium. These 3 species are very nearly allied to 

 each other, and might almost be taken for so many varie- 

 ties. They have all likewise the property of mechanically 

 entangling- flies by the proboscis which is retained in the 

 acute fissure of ilie anthers. They afford by incision a 

 lactescent fluid, which when sufficiently dried exhibits all 

 the properties of Gum Elastic or Kaoutchouk, supposed at 

 one time to have been the exclusive property of the Urce- 

 (jla elastica, but conm)on, probably, to most of the lactes- 

 cent APociNEiE, and perhaps many more of the Exi phor- 

 BiACEJE than the Slphonia elastica, of Brazil and Guiana. 



Of this genus theie are several other species in South 

 America, India, and the Cape of Good Hope, and 1 species, 

 A. venetim^ said to be indigenous to the islands of the 

 Adriatic. 



239. PERIPLOCA. i. 



Calix minute, 5-cleft, persistent. Corolla vo^ 

 tate, flat, 5-parted, orifice surrounded with an 

 urceolate 5-cleft crown, terminating in 5 fili- 

 form appendices or awns. Stijle 1; stigma capi- 

 tate with 5 angles. Follicles 2, ventricose. Seed 

 i'omose. 



Shrubs, many of them climbing'; leaves opposite; flow- 

 ers subcorynibose, axillary or terminal. 



Species. 1. P. grceca. Naturalized or indigenous in 

 the western part of the state of New York. Flowers 

 brownish, sometimes 7-cleft, segmenisof the corolla each 

 marked with a villous oblong central spot; stigma with 

 30 crenatures. 



Tl:e rest of this genus belongs to India and Africa. 

 The I*, grceca exists in Syria and Siberia, as well as in 

 North America. 



240. GONOLOBUS. \Michaux. 



Corolla rotate, v^-parted. Lepanthiumj (or 

 nectary) simple, rylindrir, subc j.infso, 5-l()bed, 



I Lte.alh, in ine plnr ••, Jioiver-scales, (from ^eTea. a scale, 

 and oiv66i, a flower,) intended to designate generally, the inte- 

 rior corolla or petaloid nectarium of Linnaeus. In this place it is 

 the saire as tlie corona stamineay ** stumineous crown," of R. 

 Biovn; but used only by him to point out the very singular 

 lepanlhium which exists in the order AscLEPiADEiE. 



