Compositce.'] 
MEXICO.— SUPPLEMENT. 
435 
habit of a Chrysopsis it will no doubt be found to belong to some other genus when more perfect specimens 
can be examined. 
1. Wedelia (n.sp.); caule erecto suffruticoso, ramis elongatis striatis pubescenti- 
hirsutis, foliis brevissime petiolatis ovatis serratis longe angusteque acuminatis trinerviis 
supra undique subtus ad nervos strigoso-hispidis setis tuberculo albo impositis, pedunculis 
terminal ibus vel e dichotomiis ramorum folio longioribus monocephalis, involucri squamis 
ovato-ligulatis exterioribus subfoliaceis hirsutis interioribus subscariosis ciliatis, achenio 
glabro calyculo fimbriato dentibus 2 longioribus. 
Hab. Acapulco. — This does not accord with W. Acapulcencis of H.B.K., nor with any other described 
species. 
2. W. cordata (n. sp.); piloso-scabra herbacea, foliis longe petiolatis cordatis (supe- 
rioribus ovato-cordatis) acuminatis membranaceis serratis trinerviis, pedunculis terminali- 
bus gracilibus tricephalis diphyllis, involucri squamis lanceolatis acutis pubescenti-hirtis, 
acheniis ? 
Hab. Realejo. — Apparently a tall growing herbaceous plant, scabrous to the touch, and, when the leaves 
are magnified, the hairs are seen to be short but situated on a small white tubercle as in the preceding 
species, from which in other respects it is totally different. The acbenia are too young to allow us to describe 
their form accurately. 
3. W. populifolia (n. sp.) ; herbacea elata erecta pubescenti-scabra, foliis lato-cordatis 
longe petiolatjs serratis tenui-acuminatis trinerviis, paniculis foliosis, capitulis saepe subver- 
ticillatis, pedunculis pedicellisque pilosis, involucri squamis ovatis acutis striatis versus 
apicem praecipue hirsutis, acheniis . . . ? 
Hab. Realejo. — Here, also, the flowers are too young, to exhibit the exact structure of the achenium and 
pappus : but the species is very different from the preceding ones. The capitula are numerous and frequently 
subverticillate. 
4. W. suhjlexuosa (n. sp.) ; herbacea, glabra, vel sub lente minute piloso-hispida, ramis 
elongatis subflexuosis, foliis ovatis acuminatis membranaceis serratis trinerviis basi in 
petiolum perbrevem attenuatis, paniculis terminalibus et e dichotomiis ramorum poly- 
cephalis subaphyllis, involucri squamis ovatis acutis striatis pubescenti-hirsutis, acheniis 
obovatis, pappo calyculato fimbriato dentibus subsequalibus. 
Hab. Realejo. — Readily known from the preceding ones by the different leaves, the long flexuose branches, 
and the closely imbricated rather small scales of the involucre. 
1. Tithonia angustifolia (n. sp^) ; caule fruticoso incano, foliis plerisque oppositis 
lineari-oblongis obtusis coriaceis asperis obscure serratis trinerviis brevissime petiolatis 
subtus reticulatis albo-canescentibus, pedunculo terminali brevissimo monocephalo cylin- 
draceo, involucri squamis pluriserialibus lato-oblongis striatis obtusis incanis margine 
albo-ciliatis, acheniis interioribus biaristatis. — T. pachycephala. Hook, et Arn. svpra, p. 
299. {non De Cand.) 
