. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. PROTOBASIDIOMYCETES 437 tongue-shaped bodies . mm. high, opening by an irregular rup- ture of the peridium. The spores are, according to Arthur, coarsely verrucose with deciduous tuber- cles, except along one narrow line, where tubercles fail. The uredospores are produced in orange-yellow sori, which soon fade to nearly white. They are generally ellipsoidal, measuring 27-30 x 17-22/*. The teleuto- spores are borne in crowded waxy masses, and are at maturity a chain of four basi
. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. PROTOBASIDIOMYCETES 437 tongue-shaped bodies . mm. high, opening by an irregular rup- ture of the peridium. The spores are, according to Arthur, coarsely verrucose with deciduous tuber- cles, except along one narrow line, where tubercles fail. The uredospores are produced in orange-yellow sori, which soon fade to nearly white. They are generally ellipsoidal, measuring 27-30 x 17-22/*. The teleuto- spores are borne in crowded waxy masses, and are at maturity a chain of four basidial cells within a somewhat gelatinized common wall. They are sessile, 55-80 x 15—23//., and the cell wall at the apex is generally swollen, often 13. Coleosporium Senec,on,s attaining a maximum thickness (i after Tulasne) of 30—40 //... Fig. XXVIII. RUST OF POPLAR Melampsora tremula? Tul. Tulasne applied the above name to a rust of the poplar (Popidus tremula) occurring throughout a considerable range in Europe. It would seem that this name would now in- clude at least three forms, or species, as dis- tinguished by Klebahn, viz., Melampsora Pinitorqua Rostr., Melampsora Larici-tremula Kleb., and Melampsora Mag- nusiana Wagn. These. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Duggar, Benjamin M. (Benjamin Minge), 1872-1956. Boston ; New York : Ginn
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