i8o 



BRITISH GALLS 



Polygonum aviculaxe Linn. in. Common Knot- 

 grass. 

 Lepidop' Buds swollen, conical or fusiform swelling at the ex- 

 tera tremity of the twig amongst the terminal leaves ; tinted 

 red, sometimes 15 mm. long and 3 mm. thick. Each gall 

 contains a green caterpillar. (Plate VII. i.) 



AUGASMA AERATELLA Zell. 319 

 Syn. Asychna aeratella Zell. 320 



Connold, Plant Galls, p. 145. Houard, No. 2153, 2154. 



Polygonum hydropiper Linn. 105. Biting Persicaria. 

 Fungi Inflorescence swollen. See No. 318, 



USTILAGO UTRICULOSA NeeS 32I 

 Plo Wright, p. 280. 



Polygonum persicaria Linn. 1 12. Spotted Persicaria. 

 ,, Inflorescence swollen. See No. 318. 



USTILAGO UTRICULOSA Nees 322 

 Plowright, p. 280. 



Polygonum la^atliifolium Linn. 105. Pale-flowered 

 Persicaria. 

 " Inflorescence swollen. See No. 318. 



USTILAGO UTRICULOSA Nees 323 

 Plowright, p. 280. 



Polygonum amphibium Linn. 108. Water Persicaria. 



Diptera Flowers deformed. Leaf margins rolled inwards, 



slightly serrated, much swollen ,and contorted ; brightly 



coloured, orange, red, or purple. Larvae gregarious, red. 



M.G. 



Perrisia persicariae Linn. 324 

 Syn. Dasyneura persicariae Linn. 325 



Connold, Veg. Galls, pi. 82. Plant Galls, fig. 246. 

 Houard, No. 2157, 2159. 



Polygonum bistorta Linn. 74. Snakeweed. 

 Fungi Thickened hemispherical spots on the leaves, containing 



the dark violet teleutospores. July and August. 



USTILAGO BISTORTARUM D. C. 326 



Syn. Tilletia bullata Fckl. 

 Plowright, p. 277. 



Fagopyrum sagjttatum Gilib. {escukntum Moench). 

 Buckwheat. 

 Nematoda Stems swollen and twisted, internodes shortened and 

 thickened, leaves often hypertrophied. 



Tylenchus devastatrix Kiihn 327 

 Connold, Plant Galls, p. 244. Houard, No. 2175. 



