182 COMPOSITE FAMILT. 



b. Branches of the style long and slender or mostly rather club-shaped, smooth or 

 very minutely puberulent under a lens. 



81. LIATRIS. Heads of several or many rose-purple flowers, surrounded by a 

 more or less imbricated involucre. Lobes of the corolla rather long. Akenes 

 slender, about 10-ribbed : pappus of many long and slender bristles, which are 

 plumose or else beset with a short beard or roughness for their whole length. 

 Leaves alternate, entire. . - . 



22. KUHNIA. Heads small, of 10-25 dull cream-colored flowers, surrounded by a 

 few lanceolate scales of the involucre. Corolla slender, barely 5-toothed. 

 Akenes cylindrical, many-striate: pappus a row of white plumose bristles. 

 Leaves mostly alternate. 



S3. MIKANIA. Heads of i flesh-colored flowers, with an involucre of only 4 

 scales. Corolla 5-toothed. Akenes 5-angled: pappus a row of hair-like 

 naked (barely roughish) bristles. Leaves opposite ; stem twining. 



24. EUPATORIUM. Heads of 3 or more flowers, and an involucre of several or 



many scales. Corolla 6-toothed. Eeceptacle flat or merely convex. Akenes 

 5-angled: pappus a row of hair-like naked (barely rough) bristles. 



25. CONOCLINIUM. Heads, &c. as in the preceding, but the receptacle conical. 



Flowers many, blue or blue-purple. Leaves opposite. 



26. AGERATUM. Like the preceding; but the receptacle flattish, and the pappus 



of a few chaffy scales, mostly tapering into a slender stiff rough bristle. 

 Leaves opposite. 



27. PIQUEBIA. Heads very small, of 3-5 white flowers, and involucre of 4 or 5 



scales. Akenes 5-angfed : pappus none. Leaves opposite, 3-ribbed. 



C. Branches of the style smooth, with a conical or flat unusally minutely hairy tip. 



28. CACALIA. Heads coryrabed, with 5-30 white or whitish flowers. Scales of 



the involucre a single row, with a few small bractlets at base. Corolla 

 5-cleft. Akenes oblong, smooth : pappus of very many fine and soft down- 

 like naked bristles. Leaves alternate. 

 40. BELLIS. A cultivated state of the Daisy, with quitted (monstrous) flowers 

 may be sought here. 



B. WiUi strap-shaped corollas or rays at (he margin of the head. 



§ 1. Herbage not spotted with large translucent or colored strong-scented glands. 



* Pappus of copious hair-like bristles: no chaff on the receptacle among the flowers. 



•*- Bays yellow, except in one or two species of Senecio and one SoUda,go, pistillate, 



29. TUSSILAGO. Ray-flowers very numerous and in many rows, fertile, with 



narrow ligules ; the tubular disk-flowers few in the centre, and not fertile. 

 Scale of the involucre nearly in one row. Pappus fine and soft. Head soli- 

 tary on a scaly-bracted scape. 

 80. SENfiCIO. Ray-flowers several in a single row, or sometimes none : the disk- 

 flowers (as in all the following) perfect and fertile. Scales of the involucre in 

 a single row, or often with small bractlets at the base. Pappus very fine and 

 soft. Heads mostly in corymbs. Leaves alternate, simple or compound. 



31. ARNICA. Ray-flowers several or many in a single row. Scales of the invo- 



lucre nearly equal in 2 rows. Pappus a single row of rough rather rigid 

 bristles. Akenes slender. Heads few and rather large. Leaves opposite. 



32. INULA. Ray-flowers very numerous in one row, with narrow ligules. Outer 



scales of the involucre leaf-like. Pappus of many slender roughish bristles. 

 Akenes narrow. Heads large and broad, the tubular perfect flowers very 

 numerous, their anthers with two tails at the base. Leaves altei-nate. 



33. CHRYSOPSIS. Ray-flowers numerous in one row, scales of the involucre 



narrow, not leaf-like. Pappus of many roughish slender bristles, with also an 

 outer row of very short and stout or chaff-like bristles. Akenes flattened, 

 hairy. Heads single or corymbed. Leaves alternate. 



34. SOLIDAGO. Ray-flowers 1 - 8, or rarely 10 - 16, the tubular disk-flowers sev- 



eral, rarely many. Involucre oblong, its scales imbricated and appressed, of 

 unequal lengths. Pappus a row of slender roughish bristles. Akenes nar- 

 row, terete, many-ribbed. Heads in panicled racemes, corymbs, or clusters, 

 mostly small, teaves alternate. 



t- H- Bays white, purple, blue, cfc. never yellow, the flowers of the dish mostly yellow. 



Asters and the like. Leaves alternate, simple. Akenes flattened or flattish. 



86. CALLISTEPHUS. Ray-flowers very numerous, usually in more than one row, 



or in cultivated varieties in several rows. Involucre in several rows, more or 



