240 COMPOSITE. (COMPOSITE FAMILY.) 



* Stems commonly simple, dilated under the head: disk-flowers yellow : rays 20 or more. 



*- Achenia smooth. 



1. L. Helenium, Nutt. Smooth or nearly so ; leaves entire or obscurely 

 serrate, lanceolate or linear, the lower ones decurrent, the lowest tapering into a 

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

 bristle-pointed ; achenia smooth. (L. decurrens, Ell.) Margins of pine-barren 

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

 l-2high. 



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

 sessile, not decurrent, sinuate-pinnatifid or incised ; scales of the pappus lacer- 

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

 barrens, Georgia and westward. Resembles No. 4. 



*- +- Achenia hairy on the angles. 



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

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

 serrate, decurrent ; scales of the pappus fimbriate. Low pine 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 decnrrent, denticulate ; the lowest spatulnte- 

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

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

 ward. April and May. Stem 2 high. 



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

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

 late-oblong, obtuse ; scales of the pappus obtuse, slightly lacerate at the apex. 

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

 Heads large. 



* * Stems branching, leafy : heads corymbose : rays 8-12 : Jloivers of the disk purple. 



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

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

 abruptly awn-pointed ; achenia hairy on the angles. River-banks, Florida to 

 North Carolina. May and June. Stem 1 - 2 high. 



61. BALDWINTA, Ell. 



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

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

 the involucre short, fleshy, imbricated in about 4 rows. Receptacle deeply alve- 

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

 hairy achenia. Pappus of 7 - 9 oblong nerveless chaffy scales, as long as the 

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

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

 flowers on a long peduncle. 



1. B. uniflora, Ell. Low pine ban-ens, Florida to North Carolina, and 

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

 a form with the disk-flowers dark-purple. The rays are also sometimes tubular. 



