POLYGONACE^. G7 



FORM v.— Polygonum (aviculare) rurivagum. Joni. 



Tlate MCCXXXI. 



P. rurlvagum, Jonl. JDor. Fl. tlu Ccutr. de la Fr. Vol. II. p. 5G0. Norm. 1. c. 

 p. 141. 



Stem erect; branches spreading-ascending or erect at the apex. 

 Leaves e]li[)tical or strapshaped-elliptical, about as long as the inter- 

 nodes, very acute. Ochrea3 very long, brown at the base, shining 

 silvery white and at length laciniate for the greater part of their length. 

 Perianth strongly veined in fruit, green, with the margins of the 

 periantli segments bright crimson, occasionally crimson all over. Nut 

 a little longer than the perianth, reddish chestnut, slightly shining, 

 especially on the angles. Plant greyish green. 



In corn-fields. Common in sandy and chalky districts in Kent, 

 Surrey, Essex, and Norfolk. I have it also from Warwickshire and 

 Durham. 



England. Annual. Late Summer, Autumn. 



A handsome plant, which I believe to be distinct as a subspecies, as it 

 frequently grows intermixed with P. agrestinum, without intermediate 

 forms. Stems 1 to 2 feet hi2:h, slender, with eloni^ated internodes. 

 The ochrece are much longer than in any of the preceding. Leaves 



1 to 2 inches long, much less spreading, and more attenuated at each 

 extremity than in the forms previously described. Flowers generally 



2 or 3 together, ^ inch long, more or less tinged with very bright 

 crimson. Nut with the point usually projecting beyond the perianth. 

 Plant of a much less lively green than in the common forms, and 

 with much the aspect of the continental sj^ecies P. arenarium and 

 P. Bellardi. 



FORM VI.— Polygonum (aviculare) littorale. LinJc. 



P. littorale, " LinJc;' Meisn. in B.C. Prod. Vol. XIV. p. 98 (non Gren. & God,:). 



Stem prostrate; branches prostrate or ascending at the apex. 

 Leaves oblong-elliptical or oblong, shorter than the full-gro^vn inter- 

 nodes, subacute, rather thick, and somewhat fleshy, Ochrea3 rather 

 short, brown at the base, dull silvery white, and at length laciniate 

 at the apex. Perianth rather strongly veined in fruit, green, with the 

 margins of the perianth segments bright crimson, occasionally bright 

 crimson all over. Nut a little longer than the perianth, chestnut, 

 slightly shining, especially on the angles. Plant deep dull green. 



On sands, Avaste ground, and loose shingle by the sea. Probably 



K 2 



