230 I <)M1M)S1T.H. ((■():« I'OSITK F.\MII,Y.) 



1"). S. glomerata, Miflix. Smuoili; stiMn stout, simple; loavcH large, 

 <)l)liiiij;;-laiRi''>lali-, aiiiininate at eaili i-ml, sliarplv soiratc, tlic lowest tapcr- 

 iiii; into a lu-tiole; racemes cluster-like, imiili shorter tiiaii the leaves; the 

 upper oues aitjtroximate ami raienmse ; heads \ery lar^t;, ."{0-40 Howered ; 

 raws 10-12; scales of the involucre acute, smooth ; achenia jtuliesceiit — 

 llii;li mountains of North Camlina. Sij)t. — Stem 1^-2 iiij^^h. l>eaves 4'- 



9' lonir. 



■I- -I- ■»- Jiuri'uu's cori/mbuse : lirnds vrri/ larr/e. 



16. S. rigida, L. Hough-puljescent aud .somewhat hoary; stem stout; 

 leaves ri;:;id, oval or ohlonj^, serrate, sessile ; the lowest narrowed into a peti- 

 ole; corynil) compact; heads ;J0 - 35-tlowercd ; rays 7-10; scales of the 

 involucre obloni(, ohtuse ; achenia smooth. — Mountains of Georgia, and north- 

 ward. Sc])t. — Stem 3° - 4° high. Lowest leaves G' - 9' long. 



17. S. COrymbosa, Kll. Stem erect, smooth; the branches rough- 

 hairy ; lower leaves ohlong-lauceolate, the upper ovate ; all fleshy, rigid, 

 smooth, but very rough and fringed along the margin ; racemes corymbose, 

 the low er recurved ; rays long. — Upper districts of Georgia and Tennessee. 

 Sept. -Oct. — Stem stout, 4° -6° high. Lower leaves 4'-0' long. Heads 

 about 30 flowered. Scales of the involucre oval. Rays about 10. 



18. S. spithamaea, M. A. Curtis. Stem low (8' -12'), rigid, soft-hairy ; 

 leaves oblouglauceoLitc, smooth, sharply serrate, acute ; the lowe.st tapering 

 into a petiole; corymb dense, compound; heads 25-30-flowered, rays 6-7, 

 short ; scales of the involucre lanceolate, acute ; achenia pubescent. — Moun- 

 tains of North Carolina. Sept. — Stems tufted. Leaves 1' - 3' long. 



* 9ff Racemes \-sided, mostli/ compound, sj)7-eadinfj or recurved (in Nos. 20 and 



21 often erect), commonlij disposed in a pyntmidal panicle. 

 1 ■»- Smooth species, growing in marshes : stems virgate : leaves very numerous, 



more or less fleshii ; the lowest elongated and tapering into a margined petiole ; 



the upper small and passing into bracts: heads middle-sized: achenia 



puhearcnt. 



10. S. flavovirens, Cliapm. Smooth tliroughout ; stem stout, simple; 

 leaves oidong, obtuse or mucronate ; the lowe.st serrate, on winged petioles, 

 the upper entire, narrowed at the base; panicle ijyrainiilal ; heads 10-12- 

 flowered ; rays mostly 3, sliowy ; .scales of the involucre lanceolate, acutish. — 

 M,arshes, Apalachicola, Florida. Sept. — Whole ])lant yellowish green. 

 Stem 2° -6^ high. Lowest leaves .5 '-10' long, obscurely ribbed. Heads 

 rather larg«. 



20. S. stricta, Ait. Smooth; stem slender, rarely branched; leaves 

 somewhat fleshy, entire ; the lowest oblong-spatulate, sometimes slightly ser- 

 rate, veiny ; the upper very small, lanceolate, appressed ; panicle racemose, 

 erect, or pyramidal, with the lower racemes 1-sided ; heads 12 - 16-flowercd ; 

 rays .5 -7; scales of the involucre lanceolate, acute. — I'ine barren swamps. 

 Sept. — Stem .3'='- .5- high. 



21. S. angUStifolia, Ell. Smooth; stem slender, simple, or branched 

 above ; leaves flesliy, entire, the lowest lanceolate, the upper linear and acute ; 

 panicle racemose or pyramidal, lower racemes spreading and Isided; lieads 



