REMARKS OF M. BAUER. 73 



period at which I discovered the parasite within 

 the cavity of the ovule of a young plant of wheat 

 (the seed grain of which had been inoculated 

 with the fungi of uredo foetiday and sown the 

 14th November, 1805,) was the 5th of June, 

 1 806, being sixteen days before the ear emerged 

 from its hose, and about twenty days before 

 the sound ears, springing from the same root, 

 were in bloom. At that early stage, the inner 

 cavity of the ovum is very small, and, after 

 fecundation, is filled with the albumen or fari- 

 naceous substance of the seed, and already oc- 

 cupied by many young fungi, which, from 

 their jelly-like root or spawn, adhere to the 

 membrane which lines the cavity, and from 

 which they can be easily detached in small 

 flakes, with that spawn. In that state their very 

 small pedicels may be distinctly seen. At first, 

 the fungi are of a pure white colour ; and when 

 the ear emerges from its hose, the ovum is much 

 enlarged, but still retains its original shape ; 

 and the fungi rapidly multiplying, many of 

 them have then nearly come to maturity, as- 

 sumed a darker colour, and having separated 

 from the spawn, lie loose in the cavity of the 

 ovum. The infected grains continue growing, 

 and the fungi continue to multiply till the 

 c3 



