POLYGONEAE 315 



Genus 1. Emex. 



Flores polygamo - monoici, aggregati, pseiulo-verticillati, 

 saepe racemosi, axillares, breves, aphylli; in masculis 2^eri- 

 goimm herbaceum, 5-6-partitum, lobis aequalibus, patentibus; 

 stamina 4-6, lobis perigonii alterna, filamentis brevibus, an- 

 theris basifixis, oblongis, emarginatis; in femineis perigoniuni 

 herbaceum, trigono-infundibuliforme, 6-fi(lam, deraum auctum 

 et induratum, dentibus tribus exterioribus tubi angulos ter- 

 minantibus, spinescentibus, subrecurvo-patentibus, inferiori- 

 bus tribus minoribus, planis, erecto-conniventibus, tubo tur- 

 binato-triquetro, lacunoso vel foveolato - nervoso, incrassato; 

 ovarium subtriquetrum, ovnlo basilari, erecto; styli tres, bre- 

 ves, erectiusculi; stigmata penicillata; acheniiim tubo perigo- 

 niali inclusum, liberum, subtriquetrum; semen erectum, tur- 

 binato-triquetrum, embryone albumini farinoso circumposito, 

 cotyledonibus foliaceis, radicula supera, exerta. Herbae hu- 

 miles, flexuosae et subdichotomo-ramosae; ochreae membra- 

 naceae, truncatae, eciliatae, mox lacerae; folia sparsa, petio- 

 lata, herbacea, integerrima, deltoideo-ovata. 



Encll Gen. Pl. 1992 et suppl. IV. 2. pag. 51.—Meisn. 

 Gen. pag. 317. — Neck. Elem. 2. pag. 214. — DV. Prodr. 

 14. pag. 40.—GUSS. Sgn. Fl. Sic. 1. pag. 436.—Torn. Fl. 

 Sic. pag. 434.—Moris Fl. Sard. 3. pag. 410.— Yiho Moen- 

 ch. Hleth. pag. 318. 



I. E. spinosa. — Flores diclini, glomerati, axillares; masculi 

 pedicellati et in racemo vix bipollicari, axillari vel termi- 

 nali dispositi, pedicellis enodibus, nutantibus, perigonio sex- 

 partito, foliolis interioribus obverse lanceolatis, vel obovatis, 

 concavis, obtusis, nudis, inermibus, alternis internis; feminei 

 sessiles, perigonio externo inferne connato et tubuloso-urceo- 

 lato, crasso et trinervato, demum inter nervos et suturas 

 foveolis seriatis scrobiculato, superne tritido, laciniis ovatis, 

 apice spinescentibus, patenti-recurvis, perigonio interno pa- 

 riter trifido, laciniis ovatis, acutis, muticis, nervo crasso di- 

 remptis, integerrimis, conniventi - pyramidatis; stamina sex, 

 antheris albidis; styli tres; stigmata lateraliter e scissura la- 



