224 A NEW GENUS OF COMPOSITA. 
E. ligulefolium, Hook. and Arn. l. c., E. gnidioides, DC., and Æ. eri- 
coides, DC. Tt is not probable, however, that Disynaphia can be ad- 
mitted except as a section of Eupatorium, some genuine species of 
which have the pappus nearly or quite as biserial; and in many 
others it is barbellulate or barbellate-denticulate. 
Among the species with a barbellate and strictly uniserial pappus 
which have been referred to Eupatorium, are the ambiguous Zupatorium 
decipiens and E. paradoxum, Hook. and Arn. l. c.; two closely allied 
species, although the former has nine- to twelve-flowered, the latter 
five-flowered capitula. The latter is Nothites baccharidea of De Candolle 
(who ivas not acquainted with any of the original species of this genus) ; 
the former is Æupatorium foliosum, DC., and also doubtless, as Mr. 
Bentham has suggested to me, the Ophryosporus triangularis of Meyen. 
Another groupe of extra-tropical South American Eupatoria with a 
barbellate pappus, the setæ of which more or less evidently occupy two 
series, and are about as rigid as in Disynaphia, comprises Eupatorium 
elongatum, E. ceratophyllum, E. tanacetifolium (E. subplumosum, Don, 
ined.), and Z. lanigerum, of Hooker and Arnott, l. c., with an appa- 
rently unpublished species allied to the last (of which all, except the 
first, have more or less dissected or lobed leaves). These make so near 
an approach to Trichogonia, Gard. (Kuhnia § Trichogonia, DC.), that 
there is only the difference between a 
io separate them. 
On the other hand, Trichogonia is a perfectly good genus as distin- 
guished from Kuhnia, which has a terete and multistriate achænium. 
- It must needs include Gardner s n. 1723, referred by him to Æupa- 
torium adenanthum, DC., I think incorrectly, as the corollas are not 
glanduliferous (and only rarely sprinkled with a few resinous atoms), 
the leaves are cordate, and the pappus is so manifestly plumose, that 
De Candolle could not have overlooked it.* 
barbellate and a plumose pappus 
* TuicHoGoNIA Gardneri (n. sp.) : herbacea, glanduloso-pubescens ; caule erecto 
ramoso ; foliis cordatis acuminatis dentatis membranaceis triplinerviis in petiolum 
longiusculum alatum contractis; capitulis laxe subcorymbosis multifloris; involucri 
squamis acuminatis; corollis glabris ; achæniis glabris ad angulos tenuiter hispidulis ; 
pappi setis longiuseule plumosis.— The heads and flowers are twice as large as those 
of T. salviefolia and T. menthefolia, and the ppus plumose with (rather sparse) 
longer hairs. It will be we! Date a 
Trichogonia salviefolia and to Isocarpha eu. torioides. Planchon has remarked, in 
Herb. Hook., Denm two are iilis M the amis in P 
either all the flowers or some of them are destitute of pappus ! 
