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account. It is not impossible that the sporidia, in this and 
allied genera, may themselves produce a third and still more 
minute fruit, capable of diffusion through the tissues of grow- 
ing plants or gaining admission by their stomata. Nothing 
of the kind, however, has yet been of certainty discovered. 
Forty other species of Puccinia have been recorded as 
occurring in Great Britain, to all of which many of the fore- 
going remarks will also apply — viz., such as relate to their two- 
celled spores being found associated with, and springing from, 
the same mycelium as certain orange- coloured one-celled 
spores ; and also the main features of the germinating 
process. 
A very singular and interesting species is not uncommon 
on the more delicate grasses, being found chiefly confined to 
the leaves, and produced in smaller and more rounded, or but 
slightly elongated, patches (fig. 23). We have met with it 
plentifully amongst the turf laid down in the grounds of the 
Crystal Palace at Sydenham, and also on hedge-banks and in 
pastures. The spores are rather smaller than those of Puc- 
cinia graminis, but like them much elongated, slightly con- 
stricted, and borne on persistent peduncles. The most pro- 
minent distinction may be found in the apices of the spores, 
which in this instance are not attenuated, but crowned with 
a series of little spicules, or teeth, whence the specific name of 
coronata has been derived (fig. 25). 
The Labiate family of plants and its ally the Scrophulariaceee 
are also subject to the attacks of several kinds of Brand, a 
name, by the bye, often applied locally to the corn mildew 
and other similar parasites, and which may have originated in 
the scorched or burnt appearance which the infected parts 
generally assume. In the former natural order the different 
kind; of mint, the ground ivy, the wood-sage, and thebetony, 
and in the latter, the water-figwort and several species of 
veronica, or speedwell, are peculiarly susceptible ; and on 
most a distinct species of Puccinia is found. To provide 
against doubt which the less botanical of our readers may 
possess of the meaning or value of the term Puccinia , which 
has already occurred two or three times in this communication, 
a brief explanation may be necessary, which more scientific 
readers will excuse. 
In botany, as in kindred sciences, acknowledged species 
have their trivial, or specific name, generally derived from the 
Latin. In the last species referred to, this was coronata , meaning 
crowned , in reference to the coronated apex of the fruit. Any 
indefinite number of species with some features in common, 
are associated together in a group, which is termed a genus , 
and the term prefixed to the specific name of each species 
