626 COMPOSITE. 



PECTIS, L. 



P. ciliaris, L. Stem erect, smooth ; leaves linear, bristly-fringed below 

 the middle ; heads nearly sessile ; rays 3 ; pappus of the disk-flowers of 5 

 lanceolate acuminate scales, of the rays only 3. Keys of Caximbas Bay, 

 South Florida. Stem 6' - 12' high. 



LIATRIS, Schreb. 



L. Garberi, Gray. Hirsute, the rigid leaves at length smooth ; heads 

 closely spiked, 6-7-flowered ; scales of the bell-shaped involucre ovate or 

 oblong, cuspidate, glandular-hirsute ; pappus barbellate. Tampa, Florida 

 (Garber). 



L. tenuifolia, var. quadriflora. Leaves involute-filiform, rigid, those 

 of the stem setaceous ; heads 4-flowered ; scales of the involucre 8, half as 

 long as the disk, often cuspidate. Banks of the Caloosa River, South 

 Florida. 



EUPATORITJM, Tourn. 



E. conyzoides, Vahl. Shrubby, stem much branched (4 -6 high), 

 leaves opposite, ovate or ovate-lanceolate, acuminate, 3-nerved, serrate or 

 nearly entire ; corymb trichotomous ; heads 10 - 20-flowered, receptacle flat; 

 scales of the involucre rounded at the tip, striate ; achenium scabrous on the 

 angles. Coast of South Florida ( Curtiss). 



E. heteroclinium, Griseb. ? Pubescent; stem branching above (2 

 high); leaves opposite, ovate, crenate-serrate, short-petioled ; pedicels 1-3 

 in the forks of the branches, longer than the cylindrical many-flowered 

 heads ; scales of the involucre smooth, oblong, obtuse, striate, deciduous ; 

 receptacle globular, naked ; flowers pale blue ; achenium smooth. Keys or 

 South Florida. 



E. aromaticum, var. gracile. Smoothish ; stem long and slender ; 

 leaves thin, acuminate, coarsely serrate ; corymbs loose ; achenium slightly 

 pubescent. Dry sandy pine woods, Clear Water Harbor, South Florida. 



CONOCLINIUM, DC. 



C. dichotomum, Chapm. Stem dichotomously branched (l-2 high) ; 

 leaves deltoid, barely acute, crenate-serrate, twice as long as the short 

 petiole ; corymbs numerous, mostly in the forks of the branches, short- 

 peduncled ; heads few (3-10), short-pedicelled ; flowers blue. South 

 Florida. 



ASTER, Tourn. 



A. ptarmacoides, Torr. & Gray. Smooth or scabrous ; stems (6'- 15' 

 high) simple; leaves linear-lanceolate, 1- 3-nerved; heads small, in a flat 

 cerymb ; scales of the involucre imbricated in 3 or 4 rows, short ; rays 

 white. Northern States. 



