Pl.ex.mon. 15, POLYGON EiE. 34. PeKsicaria. 271 



Persicaria maculosa jirocumbens foliis subtus incanis, Dillen in Rati 

 *>. 146, 10. 



Polygonum pallidum var. With. Bot. Arr.413. 

 Polygonum Pennsylvanicum, var. Curtis Ft, Land. 

 Polygonum hipatiiifolium S, Sot27A jFZ. ^nY. 425. 



Ditches and watery places ; annual ; September. 



III. 35. POLYGONUM. Dioscorides. Knotgrass, 

 Perigonliim 5-paYted, persisting; stamens 8; 5 opposite, 



3 interposed, connected by a gland ; styles and stigmata 3, 

 very short ; thecidium rounded ; corcuktm lateral ; cotyledons 

 incumbent. — Root fibrous, slightly woody ; stem procum- 

 bent, branchy; leaves alternate; flotvers axillary; ocrecs 

 cylindrical, 3 or 4-flo\vered. 



Polygonum aviculare. Bird knotgrass. 



Leaves elliptical, lanceolate, edge rough ; stem procum- 

 bent, herbaceous ; ocrecB acute, few-ribbed. 



Polygonum mas vulgare, flazi %K. 14f), 1 ; Ge»-. e?n. 565. 

 Polygonum mas vulgare majus, Park. 443, i. 

 Polygonum aviculare, Lin. S. P. 519. 

 Polygonum latifolia. Rets Observ. 

 Sinne's grass. Bird''s tongue. North, 



Roadsides and paths in gravelly soils ; annual or biennial ; 

 April to October. 



Stem divaricated, knotted at every joint ; leaves ovate or 

 lanceolate ; flotvers pink, — Herb given to sick swine that 

 refuse their meat ; seeds may be ground into a good flour 

 for cakes, and are the principal food of small birds when 

 wild. 



&. Irevifolium. Leaves oblong, a quarter of an inch long. 



Polygonum brevi angustoque folio, Raii Syn, 146, 2, 



y. angustifoUum. Leaves strapshape. 



Polygonum oblongo angustoque folio, Raii Syn. 146, 3. 



S". rotundifolium. Leaves roundish, crowded. 



Polygonum folio rotundo, Dillen in Raii Syn. 147, 4. 



E. marinum. Stem rather woody. 



Polygonum marinum, Raii Syn. 147,^5. excluding his synonyms, which 

 .belong to Polygonum maritimum, Linn, a very different plant. 



IV. 36. FAGOPYRUM. Theophrastus. Buckwheat. 

 Per'igonium 5-parted, unequal, 2 inner small, 3 outer 



keeled, persisting; ^faTwens 5 interposed and 3 opposite, 

 with S nectariferous glands ; styles 3 ; stigmata 3 ; ihecidinm 



