COMPOSITE. (( OMl'OSITK FAMILY.) 263 



2. Hays neutrai . . stems mostly simple: heads solitary: perennials. 



LEPTOPODA. 



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

 serrate, lanceolate or linear, tlie lower ones decurreiit, 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, decurreut ; 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 pinnatifid ; scales of the pappus obtuse, with slightly lacerated 

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

 April - May. Stem 2 high. 



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

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

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

 lacerate at the apex. 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, uearly entire ; achenia 

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

 Leaves 3' -4' long. 



72. DYSODIA, Cav. 



Heads many-flowered, the rays pistillate. Involucre 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 

 pinnately divided leaves, and yellow flowers. 



1. D. chrysanthemoides, 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. Achenium 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 ; acheuia hairy. South 

 Florida. Oct. 



