292 POLYGONACEAE. 



RUMEX. 



Iatis,fsutnmis linearibus ; racemis longis, subsimplicihus, apice aphyllis, \erticillis dis- 

 cretis 8— 12 - floris, pedicellis prope basin noduloso - incrassatis, frucliferis deflexis 

 calyce longioribus incrassatis , apice turbinatis; sepalis interioribns (valvis) exteriora 

 oblonga adpressa duplo superantibus ovatis subulato -acuminati* utrinque 1— 2 - setosis 

 reticulatis obsolete graniferis. — Habitat in nova Hollandia ad fl. Cygnorum. 



8. R. (Rumastra?) STEUDELII Hochst. mss. in A. Rich. Tent. flor. Abyss. II. 229. — Pe- 

 rennis: caule erecto, paniculatim ramoso, striato angulato glabro; foliis oblongo - ellip- 

 ticis, apice saepius obtusis, margine undulato-crispis, nunc basi angustatis et in petio- 

 lum sensim ac sensim desinentibus, nunc abrupte cordatis, utrinque glabris; floribus 

 pedicellatis conglomerato - verticillatis; ramis floriferis elongatis paniculatis; calycts 

 fiuctiferi sepalis internis late ovalibus obtusis , margine inciso - dissectis , laciniis 

 linearibus acutis convolutis. — Habitat in Abyssiniae provinciaOuodgerate incacumine 

 monlis Selleuda. 



9. R. (Rnmastra?) TOLIMENSIS Weddell, Ann. sc. natur. (3. Ser.)VIH. 262.— Perennis : 

 caule erecto crasso striato glabro. Folia radicalia oblongo -lanceolata, 2— 3dm. longa 

 acutiuscula,basi cordata, margine undulata subrevoluta, supra glabra, subtus puberula , 

 costa crassa; petiolo decimetrali. Folia caulina ovata acuta, basi rotundata subcorda- 

 tave, margine undulato - denticulata. Ochreae membranaceae petiolo multum longiores. 

 Racemi axillares terminalesque paniculati. Flores verticillati pedicellati, pedicellis su- 

 perne incrassatis ; laciniis perigonii interioribus obovatisintegerrimis nudis, achaenium 

 acute triquetrum vestientibus. — Crescit in monte Tolima reipublicae Kovo - Grana- 

 tensis. 



1993/x. POLYOO^ELLA Michx. 



(Engelm. Rost. Journ. of nat. hist. V. pag. 231,adnot. — Endl. Gener. pl. Suppl. IV. II. p. 53.) 



FJores dioico-polygami vel hermaphroditi. Perigonium pentaphyllum 

 petaloideum, phyllis seriei exterioris 2 iminutatis, fructiferis reflexis, 

 seriei interions 3 erectis planis, post anthesin ampliatis conniventibus 

 fructum triquetrum includentibus. Stamina 8, filamenta dimorpha, 

 nempe tria phyllis perigonii interioribus opposita inferne dilatata et 

 saepe bidentata, caetera subulato -setacea. Styli 3, stigmala capitata. 

 Embryo in axi albuminis rectiusculus. - — Fruticuli ramosissimi glabri 

 in planitiebus aridissimis Amer. Bor. Orient. calidoribus vigentes: ramis 

 hornotinis herbaceis foliosis ochreatis (ochreis brevibus nudis uniden- 

 tatis); foliis crassiusculis parvulis linearibus spathulatisve subsessilibus 

 sparsis vel in axillis pl. m. fasciculatis ; floribus (albis vel roseis) par- 

 vis spicato-racemosis; rhachi dense et appresse imbricatim ochreato- 

 bracteata quasi articulata; pedicellis solitariis articulatis, fructiferis pen- 

 dulis; racemis saepius paniculatis. 



Sect. I. EUPOLYGONELLA Endl. 1. c. 



1. P. POLYGAMA Engelm. 1. c. 231. adn. — Foliis cuneato - linearibus spathulatisve; flo- 

 ribus dioico - polygamis; sepalis ovalibus ad anthesin subaequalibus; filamentis tribus 

 basi ovato - dilatatis vix aut ne vix dentatis ; stylis brevissimis. — Polygonum polyga- 

 mum Vent. Hort. Cels. t. 65. — Polygonella parvifolia Michx. Flor. Am. bor. II. 240. — 

 Polygonum gracile Nutt. — Habitat in arenosis Carolinae, Georgiae, Floridae. 



