. 1894.) Botany. ‘179 
out any doubt have peculiar fungi. Nevertheless reflecting that sev- 
‘eral species or groups of plants are notoriously attacked by a less 
number of fungi; that in certain regions of the globe, whether because 
of dryness, or because of the scarce vegetation parasitic fungi are also 
rare;’ finally that woody natures, as the three taken for data, are 
habitually more attacked by parasitic fungi than the herbaceous, I 
believe I shall be held just and in every way conservative in calcula- 
ting only thirty parasitic fungi, on the average, for each genus of 
Phanerogams. We have thus 252,510 species of parasitic fnngi, which 
united to the recorded non-parasitis amount to a total of 263,510. The 
number of parasites (252,510) divided among all the known species of 
Phanerogams (105,000) would give us the reasonable number of a lit- 
tle more than two special fungi for each phanerogamic host, without 
counting that also the ferns, mosses, liverworts, and even the greater 
fungi, offer an asylum to not a few fungous parasites. 
This calculation deduced from the number of fungi for each generic 
group of Phanerogams accords more than sufficiently with the calcu- 
lation previously made from the connection of the number of species 
of Phanerogams and that of fungi in a given area well explored, in a 
way that makes it appear that the total number of species of fungi, 
perfect and imperfect, in the whole world ought to ascend at least to 
the neighborhood of 250,000, that is to say, a little more than six 
times the number we know to-day. 
To summarize, we may conclude that the species of plants known 
and described up to the present time are about 174,000, divided into 
105,000 Phanerogams and 69,000 Cryptogams, that is in the lump 
50,000 more than were admitted even in recent works. As regards, 
then, the entire number of species which cloak our globe, by the cal- 
culations alone which I have previously explained regarding the fun- 
eous vegetation, I think we shall not go astray in estimating that the 
Flora of the world when it is completely enough known, will consist of 
at least 385,000 species of plants (that is, 250,000 fungi and 135,000 
species of the other groups). If one wish only to reduce to 15,000 the 
Species which will appear in these other groups (not fungi) the sum 
total of plants would ascend to 400,000 species at least. 
* Mycologic raphy and statistics are still little advanced. However if we see 
Europe e a ar Da rich in fungi, if we see Argentina and Brazil, Cuba and 
the United States, Australia and New Zealand, Siberia, Ceylon, and Algiers varyingly 
but yet always rich in fungi, this signifies that they are liberally diffused at least over 
à great part of the world. 
