542 



COMPARATIVE MORPHOLOGY OF FUNGI 



ium becomes reticulate until it is almost merulioid, while the sterile 

 surface may be strigose to tomentose (Fig. 361). 



As usual, the hyphae of the fructifications are binucleate; the basidia 

 are united in a palisade and at their base may show the place of nuclear 

 fusion by a slight swelling. They are entirely imbedded in a gel (Fig. 

 362, 1) and, as those of Platygloea, elevate their spores on long sterigmata 

 to the surface. At germination, the basidiospores may be abjointed 



I 1 L^ 

 SHk M 



\f M * 



\W^~ ,11 

 % W..nF 



Fig. 360. — Eocronartium muscicola. 1. Moss with sporogonium, Sp. 2, 3. Hyphae 

 in host tissue. 4 to 9. Development of basidia. Z, zeugite. 10, 11. Formation of 

 basidiospores. 12. Migration of nuclei into basidiospores, B. 13. Basidiospore before 

 abscission. (1, natural size; 2 to 13 X 1,400; after Fitzpatrick, 1918.) 



into two daughter cells which may again become septate. If germination 

 occurs in water, these daughter cells develop short, branched germ 

 tubes which cut off masses of small, uninucleate, falcate conidia on short 

 sterigmata (Fig. 362, 2 to 4). If germination occurs in nutrient solutions, 

 conidial formation may at first be retarded, and the basidiospores develop 

 luxuriant mycelia, on which later may occur coremia of ramose conidio- 

 phores bearing masses of falcate conidia at their tips (Fig. 362, 6). The 



