In the Uredines proper the germination seems to be somewhat similar, or at least not offering sufficient differences to warrant special reference in _Uredo_, _Trichobasis_, _Lecythea_, &c. In _Coleosporium_ there are two kinds of spores, one kind consisting of pulverulent single cells, and the other of elongated septate cells, which break up into obovate joints. Soon after the maturity of the pulverulent spores, each begins to emit a long tube, which is habitually simple, and produces at its summit a reproductive cellule, or reniform sporule. The orange protoplasm passes along the colourless tubes to the terminal sporule at the end of its vegetation. The two forms of spores in this genus are constantly found on the same leaf, and in the same pulvinule, but generally the pulverulent spores abound at the commencement of the summer. The reniform sporules begin to germinate in a great number as soon as they are free; some few extend a filament which remains simple and uniform, but more commonly it forms at its extremity a second sporule. If this does not become isolated, to play an independent life, the filament is continued, and new vesicles are repeated many times. [Illustration: FIG. 82.--Germinating pseudospores of (_b_) _Coleosporium Sonchi_; (_s s_) secondary spores, or sporules (Tulasne).] [Illustration: FIG. 83.--Germinating pseudospore (_b_) of _Melampsora betulina_ (Tulasne).] In _Melampsora_ the summer spores are of the _Lecythea_ type, and were included in that genus till their relation with _Melampsora_ was clearly made out. The winter spores are in solid pulvinules, and their fructification takes place towards the end of winter or in the spring. This phenomenon consists in the production of cylindrical tubes, which start from the upper extremity of the wedge-shaped spores, or more rarely from the base. These tubes are straight or twisted, simple or bifurcated, and each of them very soon emits four monosporous spicules, at the same time that they become septate. The sporules are in this instance globose. [Illustration: FIG. 84.--Germinating pseudospore of _Uromyce appendiculatus_. (Tulasne.)] In _Uromyces_ germination follows precisely the same type as that of the upper cell of _Puccinia_; in fact, Tulasne states that it is very difficult to say in what they differ from the _Pucciniæ_ which are accidentally unilocular. In _Cystopus_ a more complex method prevails, which will be examined more closely hereafter.