66. POLYGONACE.E. 271 
** Stem buff-coloured, nearly without stripes. Perigone of fr. 
hard and thick. 
9. A. arenaria (Woods) ; st. spreading procumbent with spread- 
ing branches, J. triangular-rhomboidal smuate mealy beneath, 
spike of male fi. dense naked, fertile fl. axillary, fr.-perigones 
rhomboidal-3-lobed with the lateral lobes truncate the back 3- 
ribbed the 2 lateral ribs often terminating in tubercles, seeds 
rough opaque.— A. laciniata Sm. (L. in part) E. B. 165.—Plant 
et a Fr.-perigones large, very broad.—Sea~-shore. 
A. VIT.—IX. 
7. Os1ionr Geert. 
1. O. pedunculata (Moq.); st. herbaceous wavy branched, 1. 
obovate entire attenuated below, upper 1. narrower, fr.-perigone 
long-stalked inversely wedgeshaped 2-lobed with a small inter- 
mediate tooth.—E. B. 232. St. 80. 5. Atripler Sm.—Muddy 
salt marshes near the east and south coasts of England; Cunna- 
mara, Ireland, very rare. A. VIII. IX. EI. 
2. O. portulacoides (Mogq.); st. woody, 1. obovate-lanceolate 
entire attenuated below, fr.-perigone inversely triangular rounded 
below subsessile with 3 equal lobes above and muricated on the 
back.—E. B. 261. St. 80.4. Atriplec Sm.—Common on the 
sea-shore. P. VIII—X. Sea Purslane. 
Order LXVI. POLYGONACE. 
Perianth 3—6-parted, imbricate. Stam. definite, from the base 
of the perianth. Ovary 1, free, with 1 erect ovule. Styles and 
stigmas several. Fr. not bursting, a nut, naked or covered by 
the enlarged perianth. Embryo inverted, usually on one side of 
farinaceous albumen ; radicle remote from the hilum.—Stipules 
usually cohering in the shape of ochres.—For figures of the ge- 
nera see G. F. G. Monochl. 
1. Rumex. Perianth 6-parted ; inner segments large, conni- 
vent. Stam. 6, disposed in pairs. Styles 3. Stigmas mul- 
tifid. Nut triquetrous, covered by the enlarged immer seg- 
ments of perianth, embryo lateral. 
2. Oxyria. Perianth 4-parted; 2 inner segments larger. 
Stam. 6. Stigmas 2, multifid. Nut compressed, with a 
membranous wing, larger than the persistent segments of 
perianth, embryo central. 
3. Potyconum. Perianth 5-parted. Stam. 5—8. Styles 
9--3. Nut trigonous or compressed; embryo lateral, in- 
curved ; cotyledons not contorted. 
