composite. 157 



Dry Boils. July— Sept. Stem 2 to 3 feet high, divaricately branched. Lower 

 stem'leaves 5 to 7 inches by 3 to 5, upper % as large. Heads composed of four 

 clusters, each 4-flowered, with the involucre 9 to 10-leaved. Corolla purple. 



Tribe 2. EUPATORIACEJE. 



Beads discoid or radiate; branches of ' the style much elongated, obtuse or club- 

 shaped, minutely pubescent towards the summit outside; anthers without tails at the 

 base : leaves mostly opposite. 



Sub-tribe 1. Eupatoriejj. Heads discoid. Flowers all alike. perfect and tubular 

 seldom yellow. 



3. LI ATMS. Shrcb. Button Snake-root. 



Heads several-many-flowered. Scales of the Involu- 

 cre imbricated. Receptacle naked. Flowers all tubular. 

 Corolla 5-lobed 7 the lobes slender. Pappus of 15 to 40 

 capillary bristles, plumose or barbellate. Style with the 

 branches much exserted. Achenia slender, about 10-ribbed, 

 somewhat cylmdric.-^-Perennial herbs, with tuberous roots, 

 chiefly with simple wand-like stems, many narrow rigid alter- 

 nate entire leaves, and the heads of showy flowers arranged 

 ■in an elongated spike or raceme. 



* Heads 16 to 60-Jlcwered. 



1. L. squarrosa, Willd. Blazing Star. 



Stem simple, smooth or scabrous-pubescent; leaves linear, elongated; heads few, 

 pessilo or nearly so ; scales of the involucre numerous, with elongated and leaf-like 

 spreading tips; inner ones pointed, scarcely colored ; flowers numerous ; pappus 

 plumose. 



Drv soils. Aug. A handsome plant 1 to 3 feet high, thickly beset with long 

 linear leaves. Heads 5 to 20, generally 4 to 5. Floiuers brilliant purpie. 



2. L. scarposa, TVilld. Gay Feather. 



Scabrous-pubescent; stem stout; leaves lanceolate, lower on long petioles, upper 

 linear or linear-lanceolate much smaller; heads few or many, 30 to 60-flowered, 

 remotely raccmed; scales of the somewhat spherical involucre obovate or spatulate, 

 with dry and scarious often colored tips or margins; pappus scabrous. 



Dry sandy soils; rare. Sept. Stem 2 to 5 feet high, rather stout. Leaves 

 numerous, entire, lower 3 to 9 inches long, upper 1 to 3 inches long, % to % of 

 an inch wide, rough-edged. Heads 4 to 20, 1 inch in diameter. Flowers bright 

 purple. 



* * Heads 6 to \b-flowered- 



3. L. SPICATA, Willd. Blue 'Blazing Star. 



Smooth or somewhat hairy ; stem wand-like, very leafy ; leaves linear or ianc*- 

 linear, entire smooth, the lower 3 to 5-nerved ; heads densely crowded in a long 

 spike, nearly sessile, 8 to 12-flowered; involucre bell-shaped, cylindrical, with slight 

 scabious margins; achenia pubescent or smoothish; pappus scabrous-plumose. 



Moist grounds; rare. Aug. A handsome species, sometimes cultivated, 2 to 5 

 feet high, mostly stout. Spike terminal, 6 to 8 inches long. Involucre somewhift 

 joainoua. Heads numerous, with bright purple Mowers. 



Y 



