158 BOTANY, 



329. The carpogone inside of the pericarp gives rise, by 

 branching, to one or more large cells filled at first with 

 granular protoplasm, which soon forms two to eight spores 

 (Fig. 82). Upon its outer surface the 

 spore-fruit develops long filaments 

 (known as appendages), probably for 

 holdfasts. In some genera these ter- 

 minate in hooks (Fig. 81); others are 

 dichotomonsly branched; still others 

 are needle-shaped; while many end 

 irregularly. The spore-fruits remain 

 during the winter upon the fallen 

 I -A ruptured ^^^ decaying leaves, and finally, by 

 Xghtf^owtag^thf esoaT- ™pturing, permit the sacs, with the 

 ?plS°'1i^ed"arou'i contained spores, to escape, 

 ^° *™^- 330. The Herbarium-mould (Euro- 



tium) is a near relative of the Blights. It is common on 

 poorly dried specimens in the herbarium, and also on de- 

 caying fruits, wood, etc. It sends up vertical branches, 

 which swell at the top and bear a great number of small 

 protuberances (the sterigmata, A, c, st, Fig. 83), each of 

 which produces a chain of conidia. 



331. The sexual organs appear a little later than the 

 conidia. The end of a branch of the plant becomes coiled 

 into a hollow spiral [A, as, Fig. 83), which constitutes the 

 carpogone. From below the spiral an antherid grows up- 

 ward, and brings its apex in contact with the upper cells 

 of the carpogone [B, Fig. 83), 



332. After fertilization, other branches grow up around 

 the carpogone, and finally completely enclose it, as in the 

 Blights described above ((7, D, Fig. 83). In the mean 

 time, from the cells of the enclosed carpogone branches 



