328 FLORA OF TEXAS. 



late or ovate-lanceolate, serrate or toothed, 3-ribbed at the 

 base, pubescent, opposite or alternate ; scales of the invo- 

 lucre lanceolate, mucronate, shorter than the flowers. 



E. CUNEIFOLIUM. Leaves 1' long; scales of the invo- 

 lucre obtuse, shorter than the flowers; leaves obovate- 

 oblong, serrate or entire, 3-ribbed; stem 2°-3° high; plant 

 pubescent. 



E. TEUCRIFOLIUM. Stem virgate, 2°-3° high; leaves 

 I'-IJ' long, the base rounded or truncate, ovate or oblong- 

 ovate, coarsely serrate, the upper ones small ; flowers in 

 dense corymbs, depressed in the center; scales of the invo- 

 lucre lanceolate, shorter than the flowers. 



tt Leaves peiioled. 



E. SEROTINUM, Michx. Heads 12-15-flowered ; scales 

 of involucre linear-oblong, obtuse ; achenia smooth ; stem 

 3°-6°; leaves 4'-9' long, ovate-lanceolate, acuminate, 

 3-ribbed, long-petioled. 



*** Scales of the involucre green, equal, inasingle row ; heads 8-^-floipered ; Laves, 

 achenia, etc., not resinous-dotted ; leaves on slender petioles. 

 t Heads in apanicled raceme ; leaves jAnnately divided. 



E. FCENicuLACEUM. Heads 3-5-flowered ; scales of the 

 involucre smooth, margined, notched at the apex, mu- 

 cronate ; achenia smooth ; stein 3°-8'^ high ; flov^ei'S white • 

 leaves filiform, smooth. 



MIKANIA, Willd. 



Heads 4-flowered ; scales of the involucre 4 ; receptacle 

 naked, flat ; anthers partly exserted ; corolla, achenia, etc., 

 as in Eupatorium. — Chiefly chmbing he?'bSy with opposite 

 mostly cordate leaves, and wiiitish floiuers. 



M. SCAXDENS, Willd. Smooth or pubescent ; leaves on 

 slender petioles, acuminate, toothed or entire ; corymbs 

 numerous, on short axillary branches or peduncles; scales 



