102 
Mr. Brown’s Observations on the 
Sir James Smith has already pointed out the error M. de Jus¬ 
sieu 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 anthemifolia 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 found in South America, of which four other species 
of the genus are unquestionably natives, it has probably been im¬ 
ported into New South Wales, perhaps from Brazil ; nor is it al¬ 
together 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 Enu- 
meratio 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 distinc¬ 
tion 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 pap¬ 
pus is very nearly similar in both genera, which in all other re¬ 
spects agree, it may be perhaps expedient to unite them under 
the name of Grindelia , which was first in order of publication. 
Tridax 
