CENTAUREA , 
505 
irregularly bluntly toothed or crenate by the protuberant ends 
of the ribs, strongly but irregularly and unequally ribbed and 
striated longitudinally, perfectly smooth and free from all pu- 
bescence, shining, cinereous or pale brown, minutely speckled 
with black. Hilum quite lateral deep and abrupt, not bearded. 
Pappus setiform fragile of a few brown or mostly purple very 
deciduous rough short unequal bristles, sometimes dimidiate, 
sometimes reduced to 2 or 3 or 0. Recept. densely villous or 
hirsute with long smooth shining flattened bristly hairs. 
First found by Masson in 1776, this fine pi. escaped all re- 
searches till 1865, when it was rediscovered by a Portuguese 
gardener, through my directions, in the very spot indicated by 
its first observer (See Seeman’s J. of Bot. iii. 352). It has 
since been found by Capt. Norman R.N. in one more locality, 
remote from the sea and at a higher elevation (2500-3000 ft.) 
above it. The P t0 S to habitat requires confirmation, resting 
only on the report of anonymous collectors employed by the 
Barao do Castello de Paiva. 
Though agreeing with Ptosimopappus Boiss. in the caducous 
setiform pappus, this pi. differs from it, no less than from Cen- 
taur ea proper, in the ribbed acli. and incurved irregularly cre- 
nate margin of the epigynous disk. Except, however, in the 
radiant fl. much exceeding the disk (cf. Plectocephalus Don), it 
agrees so perfectly in habit with the other Centaurece of the 
section Cheirolophns that it would be highly undesirable to se- 
parate it generically ; and it seems rather to supply cogent ar- 
guments for the non -separation of IHosimopappus also. 
§ 2. Seridia DC. Heads ovate-oblong ovate or subglobose 
armed spinulous ; apical appendage of scales not decur- 
rent, pungently palmato-spinulous. Pappus setose per- 
sistent. Ililum naked not bearded. — Herb. per. Fl, 
purple. 
t2. C. SONCHIFOLIA L. 
Subglandular-pubescent scabrous dull gr. or hoary, roots 
creeping ; st. dtvarjish diffusely 2-3-fork-branched upwards, 
branches divaricate ly spreading longer than the main st., stiff 
angular and partially winged ; 1. dull gr. shortly furry-pubes- 
cent, the lower stalked mostly irregularly or partially lyrate, 
those of the st. and branches auriculate amplexicaul and semi- 
decurrent, the upper of nearly equal size narrow lanceolate- 
oblong sessile repandly and subequablg spinc!loso-denticu/ate ; 
heads solitary terminal 2-3-leafy-bracteate moderately large 
