304 66. POLTGONAOE^. 



ing branches, I. triangular-rhomboidal sinuate mealy beneath, 

 spike of mak fl. dense naked, fertile fl. axillary, fr.-perianths 

 rhomhoidal S-lobed with the lateral lobes ti-uncate the back 3- 

 ribbed the two lateral ribs often terminating- in tubercles, seeds 

 rough opaque. — A. arenaria Woods (not Nutt.). A. lauiniata 

 Sm. (L. in part). JE. B. 165. — Plant hoary throughout. Fr.- 

 perianths large, very broad. — Sandy shores. A. VII. — IX. 



E. S. I. 



7. Obi'one Oaert. Sea-Purslaue. 



1. O. pedunculdta (Moq.) ; St. herbaceous wavy branched, 1. 

 obovate entire attenuate below, upper 1. narrower, fr.-penanth 

 long-stalked wedgeshaped 2-lobed with a small intermediate 

 tooth. — E. B. 232. Atriplex Sm. — Muddy salt marshes near 

 the east and south coasts ; very rare. A. VIII. IX. E. 



2. O. portulaco'ides (Moq.) ; st. woody, 1. obovate-lanceolate 

 entire attenuate h%\avf,fr. -perianth inversely triangular rounded 

 below subsessile with 3 equal lobes above and muricate on the 

 back. — E. B. 261. Atriplex Sm. — Common on the sea-shore. 

 P. VIII.— X. E. S. I. 



Order LXVI. POLTGONACEiE. 



Perianth 3 — 6-parted, imbricate. Stam. definite, from the 

 base of the perianth. Ovary 1, fr.>e, 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 fromi the bile. — ■ 

 Stipules usually cohering in the shape of ocreoe. 



1. RiTMEX. Perianth 6-parted ; 3 inner segments (pet.) large 

 ■with fr., connivent. Stam. 6, disposed in pairs. Styles 3. 

 Stigmas multifid. Nut triquetrous, covered by the enlarged 

 inner segments of perianth; embryo lateral. 



2. OxYBiA. Perianth i-parted ; 2 inner segments (pet.) 

 larger. Stam. 6. Stigmas 2, multifid. Nut compressed, 

 with a membranous wing, larger than the persistent seg- 

 ments of perianth ; embryo central. 



3. PoLYGtoNtTM. Perianth 6-parted. Stam. 6 — 8. Styles 

 2 — 3. Stig. capitate. Nut trigonous or compressed ; em- 

 bryo lateral, incurved ; cotyledons not contorted. 



[4. Fagopyeitm. Perianth 5-parted. Stam. 8. Styles 3. 

 Stig. capitate. Nut trigonous ; embryo central ; cotyledons 

 large, leaflike, plicate-twisted.'] 



