Polygonum 



( 221 ) 



Polypodium 



I'liulu: CiianeU d: C'y 



POLYGON VM I.AMGEHUM. 



POLYGONUM. (KNOTWBED or KNOT 



Gnxss.) 



Description. A large genus (ord. Polygonacefe) 

 of annual or perennial, hardy or greenbouse herbs 

 or sub-shrubs. Many are handsome plants of 

 imposing appearance, others are good border 

 flowers, and a few are pretty on rockvvork. 



Propagation. The annuals by seeds sown in 

 gentle hi-sit in spring ; the perennials by division 

 in autumn or early spring, and by seeds. 

 Soil. Any common soil. 

 Principal Species and Varieties : 

 affine, G" to 10", aut., hdy. oxyphyllum, Ivs. yel. 

 baldschuanicum, 20'. Sep.. 

 hdy. per. cl., wh. ; a 

 fine plant. 



Brunonis (see afftne). 

 compactum, 2', Sep., hdy. 



per., wh. 

 cuspidatum, 4' to 8', sum., 



hdy. per., wh. 

 macrophyllum, 9", aut., 



red 



per. , rosy 



lirmionis). 

 alpinum. ')" to 4", sum., 



hdy. per., wh. (,'/. 



poiymorphum). 

 scinjiaricum, wh. 

 amplt'xicaule, 2' to 3', 



Sep., hdy. ppr., rosy 



red (syn. petiolatum). 



POLYMNIA. 



Greenhouse or half-hardy perennials (ord. Com- 

 positse). Propagation, by seeds and division in 

 spring. Soil, fibrous loam three parts, leaf mould 

 and manure one part each, with sharp grit. 



Principal Species : 



cauadeusis, 6', Jy., wh., 



yel. 

 edulis, 8', sum., yel., 



edible tubers. 



pyramidalis, 10', aut., 



st., yel. 

 Uvedalia, 4' to 10', Sep., 



yel. 



POLYPODIUM. 



Description. Polypodium 450 species is the 

 largest genus in the order Filices. Botanists of 

 late years have merged in Polypodium a number of 

 smaller genera, bringing together plants covering 

 a wide range, not only in geographical distribution, 



1'nli/, ivr (fcrmandrr (trr Teitcrium). 

 Pali/pappus (sec Tess/irii/). 

 Polyphragmon (sen Timonius). 



