35o DISEASES OF CULTIVATED PLANTS 



ENTYLOMA (De Bary) 



Mycelium intercellular, not gelatinous, spores solitary, 

 terminal or intercalary, germination as in Tilletia, often 

 crowded, epispore thick, generally multistratose, hyaline or 

 brownish, smooth or ornamented ; promycelium filiform, 

 sporidiola many, acrogenous, elongated, for the most part 

 conjugating in pairs. 



Conidia present in some species, forming white tufts on 

 living leaves, etc. (= Cylindrosporium). 



Entyloma crepidicola (Trot.). This fungus forms galls 

 4-5 mm. diam. on the fibrous rootlets and on the filiform 

 rhizomes of Crepis bulbosa in Italy. It was first described by 

 the author as Urophlyctis crepidicola. In a section of a gall, 

 the spores are seen in dense black masses scattered in its 

 substance, and resembling in habit the genus Urophlyctis. 



Spores subglobose or ellipsoid, often angular from mutual 

 pressure, deep chestnut-brown, smooth, 13-15 /* 



Trotter, A., Ann. Jfycol., 6, p. 19 (1908). 

 Trotter, A., Marcellia, 6, p. 26 (1907). 



Entyloma Ascherso/iii, Wor. (=E. Magnusii, Wor.), forms 

 tubercles up to 1 cm. diameter, on stems and roots of 

 Helichrysum and Gnaphalium in Germany. 



Spores globose or elliptical, sometimes irregular, brown, 

 15-22 X 1 1-20 /', epispore multi-stratose, 4-7 p thick. 



GRAPHIOLA (Poit.) 



Erumpent ; peridium minute, black, forming a wall out of 

 which arises a tuft of yellow hyphae which carry the spores 

 up with them. 



Confined to palms as host-plants. 



Palm smut (Graphiola phoenicis, Poit.) is parasitic on 

 the leaves of Phoenix dactylifera, Chamaerops humilis, and 

 probably other species of palms, and often proves trouble- 

 some in conservatories. The fungus forms numerous minute 

 black warts having a central depression, out of which arises 

 a long yellow cluster of hyphae, looking like a miniature 

 paint-brush. When the latter disappears, the hard, black wall 

 persists. 



