476 SYNGENESIA [Asteroids* 



1. I, Helknium, L. Leaves oblong-ovate, denticulate, rugose, softly 

 tomentosc beneath, sessile and amplexicaul ; involucre tomentose, the 

 leaflets ovate. Beck, But. p. 176. 



Vulgo — Elecampane. 



GaUice — Aunee. Germ. — Der Alant. ITisp. — Enula campana. 



Root perennial, thick, branching. Stem 3 to 5 feet high, stout, sulcate, pubes- 

 cent, branching above. Leaves 9 to 18 inches long, and 4 to 6 or 8 inches Hide, 

 ovate-oblong and lance-ovate, acute or acuminate, denticulate, hoary-tonuntose 

 beneath,— the radical ones petiolate, cauline ones amplexicaul. Heads of flowers 

 large, solitary, terminal, suboorymbose ; peduncles stout, sulcate-striate, densely 

 tomentose ; inner leaflets of the involucre subllnear, scarious, the outer ones 

 ovate, tomentose j rays deep yellow, long, narrow, linear, trifid at apex ; disk 

 yellow. Anthers caudate, or produced at base into 2 setaceous appendages. Ak m 

 e/ies linear-oblong, quadrangular, striate, smooth; pappus pale tawny, simple 

 scabrous, the hairs united in small parcels at base. 



JIab. About houses, roadsides, &c. frequent. Ft. July— August. />. Sept. 



Ubs. This foreigner has become naturalized about many old settlements. The 

 root is mucilaginous; and is a popular ingredient in the preparation of pectoral 

 syrups. It is said, also, to bo one of the countless quack nostrums for the preven- 

 tion and cure of Hydrophobia. 



Sub-Tribe 7. MBLAMPODiB.fi. Heads dioicoufl, subdiolcous, or radiate with 

 the disk staminate, and the ray pistillate in a single series. Pappus 2-horntd, or 



0. Receptacle mostly bracleate. 



380. POLYMNIA. L. Mitt. Gen. 697. 

 [So named from one of the Muses ; but the reason does not appear.] 



Heads rather small. Leaflets of the involucre in a double scries, 

 concave, — the outer series 4 or 5-leavod, spreading, larger than the 

 many-leaved inner one. Corolla of the ray ligulate. Style of the 

 disk pubescent above, bifid at apex. Akenes obovoid, subcompressed, 

 3-ribbed. Pappus 0. Receptacle paleaceous. 



1. P. canadensis, L. Viscid-pubescent ; leaves angulate and hastate- 

 lobed, acuminate, denticulate, the lower ones pinnatifid; rays very 

 •mall, trifid. Beck, Bot. p. 208. 



Canadian Polymnia. 



Root perennial. Stem 2 to 4 or 5 feet high, angular-striate, scabrous-pubescent 

 and somewuat viscid, branching. Leaves 4 to 8or 10 inches long, and 3 to 6 inches 

 wide, very thin, roughish-pubescent, mostly 3-lobed and rather dilated towards 

 the apex, and deeply hastate-lobed at base, repand-denticulate, jnjtiolate, often 

 alternate,— the lowerones deeply pinnatifid, with stipule-like amplexicaul appen- 

 dages at the base of the petioles. Heads of flowers small, somewhat hemispheric, 

 loosely paniculate; peduncles slender, glandular-pubescent; outer leaflets of the 

 involucre ovate and linear-lanceolate, foliaceous, glandular-pubescent and viscid, 

 ciliate, the inner leaflets oblong, scarious, ciliate at apex ; rays white, orochro- 

 leucous (yellow, Ell), scarcely 1 third of an inch long, obovate-cuneate, obtusely 

 8-lobed at apex ; disk pale yellow. Akenes («>f the ray-florets, at least) obovoid, 

 subcompressed, smooth, dark brown, or nearly black, with a prominent rib on 

 •ach margin, and one on the inner face, crowned at summit with a whitish protu- 

 berant ring ; pappus none. 



