Hales (1727I 733) discussed the rotting of wounds, cankers, &c., but much had to be done with the microscope before any real progress was possible, and it is easily intelligible that until the theory of nutrition of the higher plants had been founded by the work of Ingenhouss, Priestley and De Saussure, the way was not even prepared for accurate knowledge of cryptogamic parasites and the diseases they induce.
Each class of flowerless or cryptogamic plants requires special treatment for the herbarium.
In cannel coals the prevailing constituents are the spores of cryptogamic plants, algae being rare or in many cases absent.
P. 21) leave little room for doubt as to their origin, which, when the cryptogamic habit and common range of their putative parents, the former unknown to the author last-named, is considered, will seem to be still more likely.
Ferns and other cryptogamic plants are in great variety and abundance.
Soon after the promulgation of Linnaeus's method of classification, the attention of botanists was directed to the study of Cryptogamic plants, and the valuable work of Johann Hedwig (1730-1799) on the reproductive organs of mosses made its appearance in 1782.
This opened up a new field of research, and led the way in the study of Cryptogamic reproduction, which has since been much advanced by the labours of numerous botanical inquiries.
The gall known as Erineum quercinum, on the leaves of Quercus Cerris, were taken for cryptogamic structures.
Flora.The flora of Germany comprises 3413 species of phanerogamic and 4306 cryptogamic plants.
To Cryptogamic Botany (1857), p. 313; Thaxter, " A New Order of Schizomycetes," Bot.
Affinities to any members of the group, and the view, of which Williamson was the chief advocate, that they form a homogeneous Cryptogamic family, is now fully established.
The seed, which need not be described in further detail, was a highly organized structure, showing little trace of the cryptogamic megasporangium from which we must suppose it to have been derived.
In a large majority of the Fern-like fossils of that period the evidence is in favour of reproduction by seeds, rather than by the cryptogamic methods of the true Ferns.