STNGENESIA.. SUPERFX.UA. 149 



scabrous; discal florets 4-cleft. Hab. 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 panicle is 

 simple with a fasiigiate tendency, the ramuli naked, or 

 merely squamose, and elegantly divaricate, each perfecting 

 2 or 3 flowers. 



8. (livancatn/n. Decumbent; divaricately and diffusely 

 branched, ramuli fastigiate; leaves subulate; discal florets 

 4 cleft. Had. In Kentucky; also abundant around St. Lou- 

 is, Louisiana, on the margin of the Missisippi; and more or 

 less along the course of that river to New Orleans. Very 

 distinct 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 through both hemispheres as far as the Straits 

 of Magellan, will probably be retrenched, if ever careful- 

 ly revised. From tiie number of species, which I have 

 examined at least patiently, I am convinced that in this, 

 as in many otiier natural genera, we must seek for cha- 

 racter under the microscope. In every genuind- species of 

 Erigeron, we may, I think, confidently expect tlie presence 

 of a double pappus, a distinction which is not altogelher 

 invisible to tiie naked eye in such species as have the 

 pilose crown coloured, the small, external paleaceous rays 

 being then readily distinguishable by their whiteness- 

 The paucity of rays in the pilose pappus, which are scarce ^ 

 ly scabrous througii an ordinary lens, their pale colour, 

 together 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 Erigeron. 



'58. INULA. L. (Flea-banc.) 



CaHx squarrose or imbricate. Rays of the 

 corolla numerous, yellow. Anthers each bise- 

 tose at the base. Receptacle naked. Fappus 

 simple. 



Flowers terminal, often corymbose. 

 Species. L I. Ihlenium. Naturalized in manv parts 

 of the state of New York, 



N 2 



