COMPOSITE. 185 



6. E. perfolia'tum. 



Leaves connate-perfoliate, pubescent. A common well-known plant of low 

 grounds, meadows, tfcc, always distinguished by the leaves being pierced by 

 the stem. Stem 1 — 3 feet high, rough and hairy, round. Each pair of leaves 

 are so united at the base as to constitute a single leaf perforated in the middle 

 by the stem. They are placed at riglit angles to the stem, and, both combin- 

 ed, are often near a foot in length. From the stem, where they are broadest, 

 they taper each way to a long point, are rough, rugose, serrate. Flowers in 

 terminal corymbs. Involucre about l!2-flowered. The whole plant is bitter 

 and used in medicine as a tonic, Aug. Tliorovglnvurt. Buncsct. 



7. E. aroma'ticum. 



Leaves petiolale, opposite, subcordate, ovate, acute, 3-nerved, obtusely 

 serrate, smooth ; sic?« corymbose at the summit; involucre simple. In low 

 woods. Wliole plant slightly pubescent, about 2 feet high. Petioles short. 

 Flowers large, white and aromatic, in small corymbs. Involucre scalesabout 

 equal, 10 — 15-tlowered. Aug. Sept. Jiiomatic Eupatorlum. 



8. E. PUBE'SCENS. Muh. E. ovatum. Bid. 



Stem hirsute ; leaves opposite, sessile, ovate, acute, obtusely dentate, rough, 

 pubescent; tori/mi fastigiate ; invulucre about 8-floweied. A large rough 

 plant, 3 — 4 feet high, growing in dry grounds. Distinguished by its opposite 

 broadly-ovate leaves, and its strong pubescence. Involucre of about ]2 

 pubescent scales, the outer much the shortest. Aug. 



9. E. ageritoi'des. 



Stem smooth; leaves onlnng petioles, subcordate, ovate, acuminate, den- 

 tate, 3-nerved, nearly smooth ; corymbs compound. Piocky hills and woods. 

 Stem round 2 — 3 feet higii, and, with the whole plant, nearly sniooth. Leaves 

 opposite, broad at base, the lower ones ort stalks 1 or 2 inches in lenoth. 

 Heads numerous, in small clusters, constituting a compound corymb. Invol- 

 ucre scales mostly in one row, containing ]2 or more flowers of a pure white. 

 Aug. Sept. JVcttle-leaced Eupatorium. 



3. MIKA'NIA. 



Flowers all tubular; involucre 4 — G-leaved, 4 — G-flowered ; 

 receptacle naked, pappus a.xillary, sinri{)le, scabrous. 



In honor of Prof Mikan of Prague. Mostly climbing herbs with opposite 

 leaves. Achenia angled. Stamens partly e,\serled. 



M. SCAKDENS. 



Stem smooth; leaves cordate, repand-toothed, acuminate, the lobes 

 divaricate, unequal; 7?o?oers corymbed. A climbing plant of wet thickets. 

 Every part smooth. Leaves opposite on long stalks, very long-pointed. — 

 Blanches o|)posite, axillary, each with a small corymb of whitish or pink- 

 •olored flowers. Involucre 4— 6-leaved, with as many flowers. Aug. Sept. 



Climbing Buncset. 



4. LIA'TRIS. 



Flowers all tubular, involucre oblong, inribricate ; recepta- 

 cle naked; pappus plunnose, copious; achenia obconic, 

 10-striate ; stjlemuch cxserted. 



