COMPLEX BRANDS. 67 



CHAPTER Y. 



COMPLEX BEANDS. 



FROM the twin-spored genns we pass to another^ 

 in wMch tbe spores are usually divided into three 

 cells^ and whicli^ from this cause^ has been named 

 Triphragmium, Only one species has hitherto been 

 found in this country^ and that not very commonly, 

 on the leaves of the meadow- sweet^, Spircea ulmaria 

 (plate III. fig. 47). Externally, it much resembles, 

 in the size and character of the pustules, many of 

 the above-named brands, but when seen under the 

 microscope this similarity disappears. In general 

 outline the spores are nearly globose, and externally 

 papillose. In one species, found on the Continent, 

 but not hitherto in Grea,t Britain, the spores are 

 covered with curious long-hooked spines, by means 

 of which they adhere tenaciously to each other. In 

 germination, the spores of Triphragmimn do not 

 ofier any noteworthy deviation from those of Pitc- 

 ciniay^ and the chief interest of our indigenous 



* Mr. Currey has only seen the tips of the germinating threads 

 swell, and become septate, each of the joints thus formed falling 

 off and germinating without producing spherical sporidia ; whilst 

 Tulasne figures globular sporidia, as will be seen in our fig. 49, 

 reduced from the figure by Tulasne. — {Vide Currey, in " Quar- 

 terly Journal of Microscopical Science," 1857, pp. 117, &c.) 



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