i88 
BRITISH GALLS 
Myce- 
tozoa 
Diptera 
J 9 
) 1 
Coleop- 
tera 
Diptera 
Coleop- 
tera 
Nodular or warty outgrowths on the roots, which become 
swollen and clubbed. The well-known ‘finger and toe’ 
disease. 
Plasmodiophora brassicae Woronin 381 
Connold, Plant Galls, p. 227. 
Radicula sylvestris Druce (Nasturtium sylvestre 
Br.). 64. Yellow Watercress. 
Large ovoid spongy swelling at the base of the leaf stalk. 
Fiowers much deformed and swollen, forming a globular, 
spongy, yellowish mass about 12 mm. across. Larvae 
yellow, gregarious. M. G. 
Dasyneura sisymbrii Schrank 382 
Syn. Cecidomyia sisymbrii Sch. 383 
Connold, Plant Galls, figs. 307, 308. Houard, No. 2648. 
Radicula palustris Moench (Nasturtium palustre 
D. C.). 84. Marsh yellow Cress. 
Inflorescence and stem swollen. June to November. 
See Nos. 382, 383. 
Dasyneura sisymbrii Schrank 384 
Houard, No. 2652. 
Barbarea vulgaris Ait. 102. Yellow Rocket. 
Flower stalks, inflorescence, leaves and petioles, de- 385 
formed and swollen. May and June. See Nos. 382, 383. 386 
Dasyneura sisymbrii Sch. 387 
Connold, Plant Galls, fig. 326. Houard, Nos. 2640-2643. 388 
Cardamine amara Linn. 76. Large-flowered Bitter- 
cress. 
On the stem, usually at the base, a unilateral feeble 
swelling, resulting from hypertrophy of the cortical paren¬ 
chyma, containing a larval cavity. Small, and easily over¬ 
looked. 
PSYLLIOIDES NAPI Koch 389 
Houard, No. 2673. 
Flowers not opening. Calyx normal ; the unopened 
corolla consists of green petals with swollen bases, the 
stamens and filaments shortened and thickened. Larvae 
red, about six in a gall. M. E. 
Perrisia cardaminis Winn. 390 
Syn. Cecidomyia cardaminis Wtz. 
Inchbald, 1883, p. 194- Houard, No. 2672. 
Cardamine pratense Linn. 112. Cuckoo Flower. 
Irregular axial swelling and elongated distortion of the 
stem, very variable in size and shape. The leaf stalk is 
