COMPOSITE FAMILY. 245 



B. angustif6lia, DC. From Wis. S., is a more slender form, bristly- 

 hairy, with narrow, lanceolate, 3-nerved, entire leaves, and 12-16 brighter- 

 colored rays. 



37. RUDBECKIA, CONE-FLOWER. (Named for Budbeck, father 

 and son, Swedish botanists.) (p. 228.) 



* Disk oblong, or in fruit cylindrical and V long, greenish yellow, the 

 chaff very blunt and downy at the end; leaves all compound or cleft. 2/ 



R. laciniata, Linn. 3-7 high, smooth, branching above; lowest 

 leaves pinnate with. 5-7 cut or cleft leaflets, upper ones 3-5-parted, or 

 the uppermost undivided; heads long-peduncled, with linear drooping 

 rays l'-2' long. Thickets ; common. 



* * Disk conical, dark-purple, the chaff awn-pointed; lower leaves often 



pinnately parted or S-cleft. (2) 



R. trlloba, Linn. Hairy, 2-5 high, much branched ; upper leaves 

 lance-ovate and toothed, and the numerous small heads with only about 

 8 rays. Penn. to Mo. and S. 



* * * Disk globular, pale dull brownish (receptacle sweet-scented}, the 



chaff blunt and downy at the end ; lower leaves 3-parted. If. 



R. subtoment6sa, Pursh. Somewhat downy, with leafy stems 3-5 

 high, ovate or lance-ovate, serrate upper leaves and short-peduncled heads. 

 Prairies, Wis., W. 



* * * * Disk broadly conical, dark-colored, the soft chaff not pointed; 

 rough-hairy plants l-2 high, leafy below, the naked summit of the 

 stems or branches bearing single showy heads ; leaves simple. 2/ 



R. specidsa, Wend. Leaves lanceolate or ovate-lanceolate, pointed at 

 both ends, 3-5-nerved, petioled, coarsely toothed or cut. Penn., W. 

 and S. ' 



R. hlrta, Linn. Stems stout and mostly simple ; leaves nearly entire, 

 triple-ribbed, oblong-lanceolate or the lowest spatulate, the upper sessile. 

 N. Y., W. and S.; introduced into meadows E. 



38. LEFACHYS. (Greek : thick and scale.) Receptacle anise-scented 

 when crushed. # (P- 227.) 



L. pinnata, Torr. & Gray. Minutely roughish and slightly hoary ; 

 the slender leafy stems 3-5 high, bearing leaves of 3-7 lanceolate leaf- 

 lets, and somewhat corymbed heads with the oval or oblong disk much 

 shorter than the oblong, drooping yellow rays ; akenes scarcely 2-toothed, 

 flattish, the inner edge hardly wing-margined. Dry soil, W. N. Y., W. 

 and S. 



L. columnaris, Torr. & Gray. l-2 high, with single or few long- 

 peduncled heads, their cylindrical disk often becoming 2' long, and longer 

 than the 5-8 broad drooping rays, these either yellow, or var. pulch^r- 

 rima, with the base or lower half brown-purple ; akenes 1-2-toothed at 

 top and winged down one edge. Prairies, W. ; also cult. 



39. HELIANTHUS, SUNFLOWER (which the name means in 

 Greek). The following are the commonest of the numerous species, 

 many of which are difficult of study. (Lessons, Fig. 381.) (p. 227.) 



* Receptacle flat and very broad ; disk brownish ; leaves generally 

 alternate, broad and triple-ribbed, petioled; flowers summer. Cult, for 

 ornament; wild only far W. and S. W. ; flowers all summer. 



H. annuus, Linn. COMMON SUNFLOWER of the gardens, with huge 

 heads ; leaves green, roughish, not hoary. 



