Australasia has been partly explored, and the results embodied in the Floras of Dr. Hooker and subsequent communications. In a note to an enumeration of 235 species in 1872, the writer observes that “many of them are either identical with European species, or so nearly allied that with dried specimens only, unaccompanied by notes or drawings, it is impossible to separate them; others are species which are almost universally found in tropical or sub-tropical countries, while a few only are peculiar to Australia, or are undescribed species, mostly of a tropical type. The collections on the whole can scarcely be said to be of any great interest, except so far as geographical distribution is concerned, as the aberrant forms are few.”[e]
The fungi collected by the Antarctic Expedition in Auckland and Campbell’s Islands, and in Fuegia and the Falklands,[f] were few and of but little interest, including such cosmopolitan forms as Sphæria herbarum and Cladosporium herbarum, Hirneola auricula-judæ, Polyporus versicolor, Eurotium herbariorum, etc.
In New Zealand a large proportion have been found, and these may be taken to represent the general character of the fungi of the islands, which is of the type usually found in temperate regions.[g]
The fungi of Asia are so little known that no satisfactory conclusions can be drawn from our present incomplete knowledge. In India, the collections made by Dr. Hooker in his progress to the Sikkim Himalayas,[h] a few species obtained by M. Perottet in Pondicherry, and small collections from the Neilgherries,[] are almost all that have been recorded. From these it may be concluded that elevations such as approximate a temperate climate are the most productive, and here European and North American genera, with closely allied species, have the preponderance. The number of Agaricini, for instance, is large, and amongst the twenty-eight subgenera into which the genus Agaricus is divided, eight only are unrepresented. Casual specimens received from other parts of India afford evidence that here is a vast field unexplored, the forests and mountain slopes of which would doubtless afford an immense number of new and interesting forms.
Of the Indian Archipelago, Java has been most explored, both by Junghuhn[j] and Zollinger.[k] The former records 117 species in 40 genera, Nees von Esenbeck and Blume 11 species in 3 genera, and Zollinger and Moritzi 31 species in 20 genera, making a total of 159 species, of which 47 belong to Polyporus. Léveillé added 87 species, making a total of 246 species. The fungi of Sumatra, Borneo, and other islands are partly the same and partly allied, but of a similar tropical character.
The fungi of the island of Ceylon, collected by Gardner, Thwaites, and König, were numerous. The Agarics comprise 302 species, closely resembling those of our own country.[l] It is singular that every one of the subgenera of Fries is represented, though the number of species in one or two is greatly predominant. Lepiota and Psalliota alone comprise one-third of the species, while Pholiota offers only a single obscure species. The enumeration recently published of the succeeding families contains many species of interest.
In Africa, the best explored country is Algeria, although unfortunately the flora was never completed.[m] The correspondence between the fungi of Algeria and European countries is very striking, and the impression is not removed by the presence of a few sub-tropical forms. It is probable that were the fungi of Spain known the resemblance would be more complete.
From the Cape of Good Hope and Natal collections have been made by Zeyher,[n] Drége, and others, and from these we are enabled to form a tolerable estimate of the mycologic flora. Of the Hymenomycetes, the greater part belong to Agaricus: there are but four or five Polypori in Zeyher’s collection, one of which is protean. The Gasteromycetes are interesting, belonging to many genera, and presenting two, Scoleciocarpus and Phellorinia, which were founded upon specimens in this collection. Batarrea, Tulostoma, and Mycenastrum are represented by European species. There are also two species of Lycoperdon, and one of Podaxon. Besides these, there is the curious Secotium Gueinzii. The genus Geaster does not appear in the collection, nor Scleroderma. Altogether the Cape flora is a peculiar one, and can scarcely be compared with any other.
At the most, only scattered and isolated specimens have been recorded from Senegal, from Egypt, or from other parts of Africa, so that, with the above exceptions, the continent may be regarded as unknown.