OF PUCCINIA JASMINI-CHRYSOPOGONIS. | 241 
weeks. І then gathered some twigs of Jasmine bearing numerous ripe eecidia, and laid 
these over the grass. Іп about ten days most leaves bore the very characteristically 
brilliant uredospore pustules, which I have already described. 
These experiments conclusively prove the genetic relationship between the :ecidium 
and the Puccinia. "The accidental contamination noted in Experiment II., designed to 
test the possible connection with P. coronata, is interesting in showing that even in such 
inoculations misleading results may easily be obtained, and that a single successful 
inoculation is by no means sufficient to establish relationship. Although I had no 
doubt that the result was due to aecident, I nevertheless re-applied the sporidia of 
Р. coronata (from Piptatherum holciforme) with great care to another twig of 
Jasmine, but without any result. With regard to control experiment, I may note that 
all nature acted as a control over my results. "The season during which my positive 
results оп Jasmine were obtained was much too dry to allow of natural attaek to take 
place. І did not find any æcidium on Jasmine naturally until the beginning of July, 
and then only in the spermogonial stage, when all my experiments had been concluded. 
Experiment I. д and the first stage of Experiment II. may, however, be regarded as 
control experiments. 
I propose naming this fungus Puccinia Jasmini-Chrysopogonis. Тһе use of a com- 
pound specific name in the case of Aeferccious species is, I think, so distinctly advan- 
tageous that it may be allowed to outweigh the general objection taken to such names in 
botanical nomenclature. 
PUCCINIA JASMINI-CHRYSOPOGONIS, n. sp.; spermogoniis profunde immersis enormibus 
126 и longis 157 и latis, paraphysibus ex ore 63 и projectis; szecidiis immersis maculas 
orbiculares vel irregulariter orbiculares diametro 8 mm.-1l cm., rubro-brunneas 
margine flavas efformantibus; pseudoperidiis cylindraceis, brevibus, dense aggregatis, 
apice stellatim erumpentibus, ex cellulis hexagoniis membranis crassis globulos 
oleaceos rubro-aurantiacos gerentibus, circa 26 х 22 и diam. compositis; secidio- 
sporis eximie rubro-aurantiacis ovalibus, tuberculatis, 26 х 20'2 и diam., 7-8 poros 
gerentibus; uredosporis in soros orbiculares vel ovales congestis, rubro-aurantiacis, 
33-28 X 26-23 п, sparsim spinosis aliquot poros gerentibus, pedicello persistenti, 
paraphysibus nullis; teleutosporis in soros ovales vel late lineares fusco-brunneos 
congestis, ovalibus apice rotundatis ad septum constrictis, membranis crassis, levibus, 
43 x 24 и ad septum pedicello persistenti; sporidiis ovalibus prim. 14X12 и, secund. 
aliquid minoribus. 
