294 CONTRIBUTIONS TOWARDS 
bentes, sesquipedales, ramosæ. Folia opposita, 14-2 poll. longa, 
3-6 lin. lata. Pedicelli terminales, 4-5 poll. longi, villosi. Invo- 
lucrum 3-seriale, squamis exterioribus 44 lin. longis. Ligule 8, 
obtusissimæ, integræ. Achaenia radii abortiva, linearia, com- 
pressa, margine ciliata, pappo 3-aristato aristellisque subconnatis 
superata; disci compressa, subalata, cuneata, pilosa, apice pro- 
funde lateque emarginata, 2-aristata, aristellis minimis basi con- 
cretis hinc inde interjectis. 
EcHINOCEPHALUM. Genus novum. 
Char. Gen. Capitulum heterogamum, floribus radi; ligulatis 
neutris l-seriatis, disci tubulosis 5-dentatis hermaphroditis. 
Involueri 3-seriati squamæ subæquales exteriores subfoliaceæ. 
Receptaculum conicum, paleaceum, paleis complicatis longe 
acuminatis pungentibus membranaceis persistentibus. Anthere 
nigricantes, subexsertz.  $/j/j rami hispidi, appendiculati. 
Achenia radii abortiva, obovata, compressa, pappo 5-aristato, 
aristis setiformibus inæqualibus scabris caducis, superata ; disci 
obovata, compresso-subtetragona, pappo 12-16-aristato, aristis 
ineequalibus caducis coronata.— Herbs annue Brasilienses 
Oyedec facie, ramis tetragonis adpresse piloso-scabris, foliis 
petiolatis, inferioribus oppositis, superioribus alternis, ovatis vel 
lanceolatis, acuminatis, grosse serrato-dentatis, utrinque appresse 
piloso-pubescentibus, capitulis pedunculatis, subcorymbosis, de- 
mum subglobosis, floribus Zuteis. 
The three plants on which I have founded this genus are allied to 
Oyedea, agreeing with it in habit, and in the structure of the 
flower, except the winged achenia of the florets of the disk, 
and the sete of the pappus, which in the present plants are 
less unequal and more fragile. That there is, however, a ten- 
dency in the achenia to be winged, is shown by a very short 
tooth-like appendix at the top of each of the angles. With Pery- 
menium it agrees in the nature of the pappus and in other points, 
but differs in having ligulate florets. Ne 
1728 et 3848. E. /atifolium ; ramis adpresse piloso-scabris, foliis 
longe petiolatis ovatis acuminatis basi subcuneatis inæqualiter 
