398 PLANT DISEASES 



becoming pale, spores cylindric-ellipsoid (sausage-shaped), 

 slightly curved, 14-16x6-7 /x. 



Hypochnus, Fries. — Resupinate, membranaceous, texture 

 loose, homogeneous, floccose, collapsing; hyphae filiform, 

 branched and anastomosing, the tips of the uppermost 

 branches becoming changed into basidia bearing 2-4-6 

 sterigmata ; spores elliptical or globose, hyaline, or coloured ; 

 epispore smooth or rough. 



Hypochnus cucumeris, Frank, Hedw.^ 1883, p. 127. — 

 Forming grey or greyish-brown membranaceo-fibrillose 

 patches on the lower part of the stem of the host, up to 

 I mm. across ; basidia elongated, bearing four sterigmata 

 at the apex ; spores ovoid, hyaline. 



Hypochnus solani, Prill, and Del., B21II. Soc. Myc, 1891, 

 p. 220, fig. — Membrane effused, thin, slightly granular, 

 cracked when dry, scarcely adhering to the cuticle, greyish 

 white, internally brownish ; basidia globoso-ovate, apex 

 rounded ; spores hyaline, ovate, base apiculate, 10x6 [x. 



Exobasidium, Woronin. — Effused, incrusting, waxy ; 

 basidia crowded, cylindric-clavate, bearing a variable 

 number of spores at the apex. 



Typically parasitic on living plants, which are deformed 

 by the fungus. 



Exobasidium rhododendri, Cramer, in Rabeiih. Fimg. 

 Eiir.^ No. 1 910. — Forming gall-like swellings on' the leaves, 

 at first pale-green, becoming more or less tinged red ; 

 basidia stout, number of sterigmata variable, often four ; 

 spores hyaline, smooth, broadly elliptical, 8-10x6-7 /x. 



Exobasidium vexans, Massee, Kew Bulhtifi, 1898, p. 

 Ill, figs. 6-10. — Forming large blisters on the leaves, 



