20 MIDLAND NATURALIST. 
in pronunciation as a great number of other accepted names, this 
is no argument for their acceptance. Mycologists do not seem 
to be scrupulous about the acceptance of polysyllabic words, as 
is evident from the fact that such words as Dictydiaethalium, Rost 
1873,* are taken without comment. It is to be regretted that 
Rudbeck’s name,t Mesomora, was not chosen by Rydberg, all the 
more for the reason that Linnaeus quoted this very example of 
Mesomora in his Philosophia Botanica, in laying down the rules 
for the authors after him that would find it desirable to break 
up his aggregate genera into their originals. That after the pub: 
lication of the Species Plantarum, 1753, the so-called “starting 
point" in nomenclature, he had not changed his mind about this 
is evident from the fact that the second edition of the Philosophia 
Botanical contains the same statement. The Rudbeckian name 
HYDRODICTYON A SYNONYM. 
The publication of Hydrodictyon, Roth, 1800, a name 
for the alga commonly called the Water-net, was preceded by the 
publication of Adanson's name Reticula in 1763. It is true that 
anson made the blunder of including a fungus in the genus, 
probably because of his ignorance of the true nature of the plant 
and reject Adanson's name in spite of the law of priority 
Reticula, Adanson, 1763, instead of Hydrodictyon, Roth, 1800. 
DASIPHORA, A SYNONYM. 
The Shrubby Cinquefoil having as a type the Linnaean plant, 
*  MacBride, T. North American Slime Moulds, 1899. 
Cooke, M. C Myxomycetes of Great Britian, 1877 
T Rudbeck, O. F. Lapp. 98. (1701) ex. Linn. Fl Suec, (1745). 
Í Linnaeus, C. Philosophia Botanica, 2nd Ed (1755) pp. 197-198. 
§ Michelius, P. A. Nova Planta m Genera, (1729) pp. 125, Tab. 66. 
l| Dillenivs, J. J. Historia Muscorum, (1741) p. 20, Tab. IV, No. 14. 
** Linnaeus, C. Species Plantarum, (1753) p. 1165 
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