SY¥NGEN#SIA. SUPERFLUA. ~ 449 
scabrous; discal florets 4-cleft. Has. In New Jersey and 
Pennsylvania, common; passing for a minute variety of 
the preceding, from which it differs in several particu- 
lars which are sufficiently constant. From 4 to 6 inches 
high, the preceding from 2 to 6 feet; in this the yunicle is 
simple with a fastigiate tendency, the ramuli naked, or 
merely squamose, and elegantly divaricate, each pertecting 
2 or 3 flowers. 
8. divaricatum. Decumbent; divaricately and diffusely 
branched, ramuli fastigiate; leaves subulate; discal florets 
4-cleft. Uap. In Kentucky; also abundant around St. Lou- 
i3, Louisiana, on the margin of the Missisippi; and more or 
less along the course of that river to New Orleans. Very 
‘listinct from the preceding by its diffuse and decum- 
bent stem, which scarcely exceeds 6 inches in height, 
but spreading out 1 or 2 feet. 
The genus Erigeron, now comprising about 50 species, 
extending thr both hemispheres as far as the Straits 
ef Magellan, will probably be retrenched, if ever careful- 
ly revised. From eee vi ig es of species, which I have 
examined at least patiently, 1 am convinced that in this, 
as in. other natural genera, we must seek for cha- 
Rr a ri the microscope. In every genuine species of 
Erigeron, we may, ! think, confidently expect the presence 
of a double pappus, a distinction which is not altogether 
invisible to the naked eye in such species as have the 
pilose crown coloured, the small, external paleaceous rays 
heing then readily distinguishable by their Ruitiencss. 
‘She paucity of rays in the pilose pappus, which are scarce- 
ly scabrous through an ordinary lens, their pale colour, 
iogeter with the form, diminutive size and comparative 
smoothness of the seed, will be found useful characters 
when contrasted with Chrysopsis, which also possesses a 
double pappus, and in some of its extremes ‘approximates 
to Brig ceabe = eat 
538. INULA. L ‘(Flea-bane.) 
~ Cilée squarrose or inubrtonte;” sere! the 
Soralla’ numerous, yellow. Axthers each bise- 
dese at the base. Receptacle naked. Pappus 
Misiierd terminal, ohn corymbose. 
Spectres. 1. I. Helenivm. Ramuealic ey: ‘in many pat 
the state of York. ioe 
