} 
THE FUTURE VEGETATION OF AUSTRALIA, 57 
mowicz, is, when reduced to Fahrenheit’s scale:— Winter, 29°4°; 
spring, 51°8°; summer, 68:8?; autumn, 50:49. The mean summer 
temperature is quite similar to that of several of the European locali- 
ties where the grass is met with, as will be seen from the following list, 
reduced to Fahrenheit's scale from Mahlmann's tables, given in the 
third volume of Humboldt’s * Asie Centrale ;— Paris, 64°6°; Turin, 
71°6°; Naples, 74°8°; Marseilles, 69:2? ; Madrid, 74-1. M. Godron 
(Gren. et Godr. Fl. de France, iii. 616) has the following observa- 
tion under the genus Nardurus, to which he refers this plant :—** C'est 
en 1844 que j'ai créé ce genre, sur la simple indication que m'a fournie 
Reichenbach, en publiant une des espèces sous le nom de N. enellus, 
Depuis, M. Boissier, qui sans aucun doute ne connaissait pas l'ex- 
istence de ce genre, l'a admis dans son * Voyage botanique en ens 
et, chose remarquable, sous la méme dénomination." Now, in the 
‘Flora Germanica Excursoria, published in 1830, Reichenbach. had 
already remarked under Brachypodium tenellum :—“ Gramen habitu 
fere Nardum referens, Nardurus / gen. propr., quasi Vudpia spicata ;” 
and in the second edition of Bluff and Fingerhuth's * Compendium 
Flore Germanize,’ published in 1836 (I have not the first to refer to), 
the aristate and muticous-flowered varieties of this group will be found 
divided between two sections, Nardurus and Catapodium. I have 
adopted the latter name, because the plant I am writing of seems to 
associate naturally with C. loliaceum (the oldest generic name), which 
is however placed in a separate tribe by Godron. In the present un- 
satisfactory condition of agrostography, the limits between various 
Triticoid and Festucoid genera, and especially the value of the numerous 
small groups split off from Festuca and its allies by Grisebach, 
Ruprecht, Parlatore, and others, cannot be determined, and we must 
await the promised revision of this vast and very difficult family by 
Colonel Munro, before we can xm to see the existing class reduced 
to order. 
Whampoa, S. China, September, 1865. 
* 
THE FUTURE VEGETATION OF AUSTRALIA. 
As soon as New Holland shall have been broken up into islands [as 
Unger prediets it will be], we may expect its vegetation to assume the 
