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382 DESCRIPTIONS OF NEW SPECIES 
lied to Burrieha in habit, but with the pappus in a numerous series, and the 
leaves plumosely torn; also to Lasthenia, but with conspicuous, regular 
rays, and an involucrum of separate sepals. It likewise approaches the 
Mantes, by the embracing sepals, but the marginal achenia are provided 
with pappus. The most paradoxical character the plants of this genus pre- 
sent, however, is in the absolute conformity, or nearly so, of all the species 
with each other, while they differ in the receptacle and in the pappus, or by 
its total absence !—(Named in allusion to the slender feather-like foliage. ) 
Ptilomeris * aristata; palee of the pappus eight to twelve, awned; the ray 
with two awns and a small crown of minute leaflets; receptacle conic, naked, 
and alveolate. 
Has. Near St. Diego, Upper California. Flowering in April. Every part of the plant minutely 
and glandularly pubescent; branching from the base, sometimes, in weak specimens only towards 
the summit, branches few-flowered, flowers fastigiate. Leaves opposite, once or twice deeply - 
pinnatifid, the rachis alated and rather broad towards the base, segments almost capillary, long and 
acute, (often an inch or more) and as fine as in Fennel. Involucrum ten to fifteen leaved, rays 
the same number; sepals lanceolate, acute, equal, foliaceous; rays as long as the disk, oblong, 
slightly owe or three-toothed, the middle tooth smaller. Flowers bright yellow, a little smaller 
than those of the common wild daisy. This, and the rest, from their abundant bright flowers, are 
very ornamental, and of easy cultivation. In a green-house, in Philadelphia, I had this and the 
following species to grow and flower luxuriantly, but they have since been lost through neglect. 
Ptilomeris * coronaria; palea of the pappus eight to twelve-awned ; the ray 
generally without awns, and with a small crown of diminutive, awnless leaflets: 
receptacle conic, densely villous and alveolate. 
_ Has. With the preceding, from which it can only be distinguished by the specific characters. 
salt oa ae =e 
~ Piilomeris * mutica; palex of the pappus six to eight-leaved, obtuse and fim- 
briate at the summit, that in the radial florets smaller; receptacle conic, sparsely 
pilose. 
Has. With the preceding, from which it can only be Aces by the pappus. The rays, 
as in the whole genus, are embraced by the sepals, 
§. 1. * PTILopsIs. Bee es none. 
Philomeris * Anthemoides; pappus none; epigynous disk very minute. 
Has. With thé above, and in no way, apparently, distinguishable from the preceding but by the 
achenium. If any thing, the involucrum in this is a little more campanulate, 
