COMPOSITE. (composite FAMILY.) 263 



§ 2. Rays neutrai: stems mostly simple : heads solitary : perennials. — 

 Leptopoda. 



6. H. Nuttallii, Gray. Smooth or nearly so ; leaves entire or obscurely 

 serrate, lauceolate 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. — Margins of pine barren ponds, 

 Florida to South Carolina, and westward. April -May. — Stem l°-2° 

 high. 



7. H. fimbriatum, Gray. Stem smooth, sometimes branching, the 

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

 scurely serrate, decurrent ; scales of the pappus fimbriate. — Low pine bar- 

 rens, Florida, and westward. April - May. — Stem 1° - 2° high. 



8. H. vernale, Walt. Closely pubescent ; leaves somewhat fleshy, linear- 

 lanceolate, sessile but not decurrent, denticulate ; the lowest spatulate-lanceo- 

 late, toothed or piuuatifid ; scales of tlie pappus obtuse, with sliglitly lacerated 

 margins. — Wet pine barrens, Florida to North Carolina, and westward. 

 April - May. — Stem 2^ high. 



9. H. brevifolium, Gray. Stem pubescent above, often sparingly 

 branched ; leaves entire, more or less decurrent, the upper ones lanceolate, 

 the lowest spatulate-oblong, obtuse ; scales of the pappus obtuse, slightly 

 lacerate at the ajjex. — Wet places, Alabama to North Carolina. May - June. 

 — Stem 1° - 3° high. Heads large. 



10. H. Curtisii, Gray. Glabrous; stem often branching; leaves lanceo- 

 late, entire, decurrent ; scales of the pappus obovate, nearly entire ; achenia 

 hairy on tlie angles. — Raleigh, North Carolina ( Curtis). — Stem 2° - 3° high. 

 Leaves 3' - 4' long. 



72. DYSODIA, Cav. 



Heads many-flowered, the rays pistillate. Livolucre bracted, the scales 

 partly united in a single row. Receptacle flat, naked. Achenia 4-angled. 

 Pappus of chaffy finely divided scales. — Branching odorous annuals, with 

 pinuately divided leaves, and yellow flowers. 



1. D. Ohrysanthemoides, Lag. Stem 1° high ; leaves opposite with 

 very narrow toothed lobes; rays few and short; pappus bristly. — Waste 

 ground, Tennessee, and westward. 



73. PECTIS, L. 



Heads several-flowered, radiate. Rays pistillate. Disk flowers somewhat 

 2-lipped, perfect. Involucre cylindrical. Scales 5-8, in a single row. Re- 

 ceptacle naked. — Branches of the style short, obtuse. Acheiiium linear. 

 Pappus composed of about five unequal bristle-pointed scales. — Chiefly an- 

 nuals. Leaves opposite, glandular-dotted, bristly on the margins. Flowers 

 small, yellow. 



1. P. linifolia, Less. Stem diffusely branched (6'- 12' high) ; leaves 

 linear, connate ; heads small, on long and slender bracted peduncles ; scales 

 of the involucre .slightly produced at the base ; achenia hairy. — South 

 Florida. Oct. 



