356 THE FUNGI WHICH CAUSE PLANT DISEASE 



lose on dorsal side with bluntly pointed tubercles 2-4 fi long, 

 1-1.5 M in diameter, ventral side smooth, pores obscure. 



III. Hypophyllous, arising from uredinia, thickly scattered, 

 very small, about 0.1 mm. across, pale-yellow; spores napiform 

 or globoid, somewhat imibonate above; wall pale-yellow or seem- 

 ingly colorless, thin, 1 n, slightly if any thicker above, smooth; 

 pedicel hyaline, one-half to once length of spore, slender. 



It constitutes a serious coffee parasite in the orient and is re- 

 ported also from Porto Rico. 



H. woodii K. & C. is a serious coffee parasite and occurs also on 

 Vanguieria edulis. 



H. oncidii Griff & Maub. is on cultivated Oncidiums in France. 



Tranzschelia Arthur (p. 354) 



Cycle of development includes pycnia, secia, uredinia and telia, 

 with alternating phases; autcecious or heteroecious. Pycnia sub- 

 cuticular, other sori subepidermal. 



0. 1. Pycnia depressed-conical or hemispherical; hymenium flat. 



Mcia, erumpent, cylindrical. Peridium dehiscent at apex, be- 

 coming recurved. iEciospores globoid; wall colored, finely ver- 

 rucose. 



II. Uredinia erumpent, definite, without peridium. Uredinio- 

 spores borne singly on pedicels, with paraphyses intermixed, 

 obovoid, somewhat narrowed at both ends; wall colored, usually 

 paler below, echinulate; pores equatorial. 



III. Telia erimipent, definite, pulverulent, without peridium. 

 Teliospores forming heads or balls by being attached by short, 

 fragile pedicels to a common stalk, which is short and incon- 

 spicuous, 2-celled by transverse septum, cells rounded and easily 

 falling apart, wall colored, verrucose. 



T. punctata (Pers.) Arth."' ^'^^ "2- ass 



I (=7Ecidium punctatum). Peridia uniformly scattered over 

 the whole of the foliage, hypophyllous, flat, semi-immersed, 

 with torn yellowish edges. Spores subglobose, pale yellowish- 

 brown, 15-24 fi in diameter. Pycnia scattered, blackish, puncti- 

 form. 



II. Uredinia light-brown, small, round, crowded, pulverulent, 

 often confluent. Spores ovate or subpyriform, apex darker, 



