S83 



BOTANY. 



the herbarium, sends up Tertical hyphse, which swell up at 

 thsB top, and bear a large number of small protuberances or 

 branches, the sterigmata {A, c, st, Pig. 191). Each sterigma 

 produces gradually a long chain of conidia, so that each 



Fig. Ti9i. —EuroHum repena. A^ a portion of the mycelium, with erect hypha, c, 

 bearing at its top a radiating cluster of sterigmata, Bt^ from which tlie oonidia have 

 fallen ; as, young carpogonium — below it a younger branch is bi ginning to coil spi- 

 rally to form another carpogonium. .B, the carpogonium, as, and the antneridium, j>. 

 O, the same beginning to be surrounded by the enveloping branches which grow out 

 from its base. D, sporocarp. M, F, sections of unripe Bporocaips ; w, outer wall ; 

 f, inner cells of sterile tissue ; as, developing carpogonium, giving rise to branches 

 from which asci are produced. C, an ascus containing eight ascospores. H, ripe as- 

 cospore. Highly magnified.— After De Bary. 



vertical hypha is terminated by a round mass, made up of 

 these radiating strings of conidia. The sexual organs appear 

 a little later than the conidia. The end of a branch of the 

 mycelium becomes coiled into a hollow spiral {A, as, Fig. 



