626 COMPOSITE. 



PECTIS, L. ' 



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

 the middle ; lieads 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. 



LTATRIS, 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-fiovvered ; scales of tlie involucre 8, half as 

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

 Florida. 



EUPATORIUM, 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 tiian the cylindrical many-flowered 

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

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

 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, Ciiapm. Stem dichotomously branclied (l°-2° high) ; 

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

 petiole ; corymbs numerous, mostly in the forks of tlie 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 

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

 white. — Northern States. 



