282 OBSERVATIONS ON THE NATURAL FAMILY 



this genus is referable to Soliva, whose principal characters 

 would consist in the want of corolla or perhaps its accretion 

 with the persistent style in the female florets ; in the peri- 

 carpia being more or less winged, and presenting their disk 

 instead of their margins to the centre of the capitidum. 

 102] Sir James Smith has already pointed out the error 

 M. de Jussieu has been led into in referring Hippia minuta 

 Linn, to his Gymnostyles nasturtiifolia, a plant much more 

 nearly related to Hippia stolonifera of Brotero ; which, from 

 repeated examination, I can with confidence refer to the 

 same genus. 



Gymnostyles antJiemifolia is stated by M. de Jussieu to 

 be a native of New South Wales : but as I have observed 

 it only in cultivated ground in the neighbourhood of 

 Sydney, and as it has certainly been foimd in South 

 America, of which four other species of the genus are un- 

 questionably natives, it has probably been imported into 

 New South Wales, perhaps from Brazil; nor is it alto- 

 gether improbable that Hippia stolonifera of Brotero may 

 have been introduced into Portugal from the same 

 quarter. 



Grindelia, 



described by Willdenow in the Transactions of the Natural 

 History Society of Berlin for 1807, and subsequently in 

 his Enumeratio Plantarum Horti Berolinensis, flowered in 

 Kew Gardens for the first time in 1815, when I had an 

 opportunity of examining it, and of determining its very 

 near affinity with Donia, a genus proposed in the second 

 edition of Hortus Kewensis, and adopted by Mr. Pursh in 

 his Flora of North America : the principal distinction 

 between these two genera consisting in a difference in the 

 number of radii of the pappus, which in Grindelia is 

 described by Willdenow as of two rays, and according to 

 my observations has more frequently one only. But as 

 even in Donia the number of rays, though indefinite, is 

 variable, and the structure of the pappus is very nearly 

 similar in both genera, which in all other respects agree, it 



