240 COMPOSIT.E. (composite family.) 



* Stems commoiili/ simple, dilateil unJcr the head : dtsk-Jioicers yeUow : rays 20 or more. 



■*- Achenia smooth. 



1. L. Helenium, Nutt. Smootli or luaily so ; leaves entire or obscurely 

 serrate, laiKcolate or linear, tlie lower ones decurrent, tlie lowest tapcrin^j: into a 

 petiole ; rays 20-30 in a single row; scales of the pappus lacerate, and mostly 

 bristle-pointed ; aclicnia smooth. (L. decurren^ Ell.) — Margins of pine-barren 

 ponds, Florida to South Carolina, and westward. April and May. — Stem 

 I°-20high. 



2. L. incisa, Torr. & Gray. Smooth ; leaves lanceolate, rather obtuse, 

 sessile, not decurrent, sinuate-i)innatifid or incised ; scales of the )):i])]mis lacer- 

 ate, or slightly timliriate at the summit ; rays about 40, in 2-3 rows. — Low pine 

 barrens, Georgia and westward. — Resembles No. 4. 



■*- -t- Achenia hairy on the angles. 



3. L. fimbriata, Torr. & Gray. Stem smooth, sometimes branching, the 

 peduncle sliglirly pubescent; leaves linear-lanceolate, acute, entire or obscurely 

 serrate, decurrent ; scales of the pappus fimbriate. — Low jiinc barrens, Florida, 

 and westward. April and May. — Stem l°-2° high. 



4. L. puberula, Macbride. Closely pubescent ; leaves somewhat fleshy, 

 linear-lanceolate, sessile but not decurrent, denticulate ; the lowest spatulatc- 

 lanceolate, toothed or pinnatifid ; scales of the papjnis obtuse, with slightly 

 lacerated margins. — Wet pine barrens, Florida to North Carolina, and west- 

 ward. April and May. — Stem 2° higli. 



5. L. brevifolia, Nutt. Stem pubescent above, often sparingly branched ; 

 leaves cniirt', more or less decurrent, the upper ones lanceolate, the lowest spatu- 

 latc-oblong, obtuse ; scales of the pappus obtuse, slightly lacerate at the a])cx. — 

 Wet places, Alabama to North Carolina. May and June. — Stem l°-3° high. 

 Heads large. 



* * Stems branch in {J, Icnfy : heads corymbose : rays 8-\2 : /lowers of the disk purple. 



6. L. brachypoda, Torr. & Gray. Stem pubescent ; leaves laticeolate, 

 entire or nearly so, decurrent ; scales of the pappus ovate, slightly denticulate, 

 abruptly awn-pointed ; achenia hairy on the angles. — liiver-bauka, Florida to 

 North Carolina. May and June. — Stem I°-2° high. 



61. BALDWINIA, Ell. 



Heads many-flowered, globose in fruit; the ray-flowers 20-30, neutral, 

 3-tootiicd at tiie apex ; tube of the disk-flowers dilated and indurated. Scales of 

 the involucre short, fleshy, imbricated in about 4 rows. Keceptacle dcejjly alve- 

 olate ; the 5-6-angled cells with entire nuirgins, enclosing the slender obconical 

 hairv' achenia. I'appus of 7 - 9 oblong nerveless chafly scales, as long as the 

 achenia. — An erect puberulent mostly simple perennial herb, with alternate 

 fleshy entire linear or (the lowest) spatulato leaves, and a solitary head of yellow 

 flowers on a long peduncle. 



1. B. uniflora, FIl. — Low pine barrens, Florida to North Carolina, and 

 westward. September. — Stem 2° -3° high. Heads large. — Dr. Curtis finds 

 a form witli the disk-ilowers dark-purple. Tlic rays arc also sometimes tubular. 



