COMPOSITAE 125 



oh, which varies from % an inch to 2 or 3 inches in length. Heads o fflowcrs in 



cymosc corymbs. 



Hob. Moist woodlands, and thickets: frequent Fl. Aug. Fr. Sept. 



T. E. iiroiiiuticum, L. Leaves lance-ovate, acute, obtusely 

 serrate, thickish and somewhat rugose- veined ; petioles rather 

 short ; scales of the involucre pubescent. 

 AROMATIC EUPATORIUM. 



Stem 1% to 2 feet high, nearly simple, or corymbose at summit, roughish-pubos- 

 cent. Leaves an inch and half to 3 inches long ; petioles % of an inch to near an 

 iuch in length. Heads of flowers in small erect corymbs; florets rather larger than 

 in the preceding, 

 Hob. Rocky banks; thickets and clearings: frequent Fl. Aug. Fr. Sept. 



189. MIKA^MIA, Willd. 



[Dedicated to Prof. Joseph Mikan; a Botanist of Prague.] 



ITcads mostly 4-flowered ; involucre of 4 or 5 nearly equal scales. 

 Receptacle small, flat. Florets dilated at throat, the akenes as in 

 Eupatorium. Clambering perennials : leaves opposite, petiolate ; 

 floivers flesh-colored, in axillary corymbs. 



1. M. SC<tn<len, Willd. Stem volubile, or clambering, nearly 

 smooth ; leaves subhastate-cordate, acuminate, repand-dentate. 

 CLIMBING MIKANIA. Climbing Hemp-weed. 



Stem 3 to 5 or 6 fet long, slender and volubile. Leaves an inch and half to 3 or 

 4 inches long, resembling those of the common Buckwheat ; petioles 1 to 2}/^ inches 

 in length. Heads of flowers in clustered cymope corymbs, on axillary branches 3 

 to 6 inches in length, the branches with a pair of leaves near the corymbs; scales 

 of the involucre roughish-pubescent 

 Jlab. Swampy thickets ; along rivulets : not common. Fl. Aug. Fr. Sept. 



1O. COHrOCLIHT'nJM, DO. 



[Or. Konos, a cone, and kline, a bed; referring to the conical receptacle.] 

 Heads many-flowered ; involucre campanulate ; scales subulate-linear, 

 imbricated. Receptacle conical. Florets and akenes as in Eupatori- 

 um. Erect perennials: leaves opposite, petiolate; flowers bluish- 

 purple, in crowded terminal corymbs. 



1. C. CCelcstinum, DC. Roughish-pubescent; leaves lance- 

 ovate and deltoid-oblong, obtusely serrate, somewhat rugose-veined. 

 Eupatorium coelestinurn. L. $ FL Cestr. ed. 2. p. 452. 

 HEAVENLY, on SKY-COLORED COXOCLIKIUH. 



Ktp.m 1 to 2 or 3 feet high, branching, often growing in bunches, roughish-pubes- 

 cent. Leaves an inch and half to 3 inches long, hairy on the nerves beneath ; 

 pctMes l / of an inch to an inch in length. Heads of flowers in rather dense cyiuoee 

 corymbs, showy and fragrant. 

 Hob. Moist thickets ; Londongrove : rare. Fl. Aug. Sept. Fr. Octo. 



Obs. This pretty plant is often, and deservedly, introduced iato 

 gardens. 



TRIBE 3. ASTEROPDEAE. 



Style-branchei in the perfect florets flattish, lance-linear, smooth up to wher the 

 stigmatic lines terminate, prolonged above this into a flattened appendage, wbich 

 is uniformly pubescent externally. Leaves mostly alternate. 



