COMPOSITA. (COMPOSITE FAMILY.) 191 
and simple stems. Leaves alternate, usually entire. Flowers purple, often va- 
rying into white, commonly dotted with resinous particles. 
$ 1. Root tuberous: leaves very numerous, linear or lanceolate, the lowest broader and 
tapering at the base, the upper sessile: heads in spikes or racemes: achenia hairy: 
pappus plumose or bearded: stems simple, or in more vigorous plants sometimes 
branching below the spikes, and bearing fewer-flowered heads. 
* Scales of the involucre with petal-like or leafy tips: pappus plumose. 
1. L. elegans, Willd. Heads very numerous in a cylindrical raceme, 4 — 
5-flowered; inner scales of the involucre petal-like, purple; stem tomentose; 
leaves smooth, the lowest lanceolate.— Dry pine barrens, Florida to South Car- 
olina, and westward. August. — Stem 2° high. Heads showy. 
2. L. squarrosa, Willd. Heads few or numerous, large, many-flowered, 
cylindrical; scales of the involucre with leafy spreading tips; stem pubescent; 
leaves smoothish or hairy, long, linear, rigid, 3- 5-ribbed. — Dry sandy .soil, 
Florida to Mississippi, and northward. July and August. — Stem 1°- 14° high. 
Heads 1' long, sessile or terminating short branchlets. Corolla-lobes hairy. 
* * Scales of the involucre not appendaged. 
+ Heads 3-6-flowered: pappus conspicuously plumose. 
3. L. Boykinii, Torr. & Gray. Nearly smooth; stem slender; leaves 
linear, dotted; heads 3—4-flowered, rather closely spiked ; scales of the invo- 
lucre smooth, lanceolate or linear, acuminate and spreading at the apex, as long 
as the pappus. — Near Columbus, Georgia. ^en and September. — Stem 
1°-2° high. Spike 6/—10' long. 
4. L. tenuifolia, Nutt. Smooth; stem tall and slender; ; leaves narrow- 
linear or filiform, the lowest long and crowded ; heads 5-flowered, in a long and 
close raceme; scales of the involucre barely pointed, smooth, purple. — Dry 
pine barrens, Florida to North Carolina, and westward. September. — Stem 
22-49 high. Racemes often 1-sided. 
+ + Heads 3 - many-flowered : pappus densely bearded. 
5. L. pauciflora, Pursh. Stem pubescent, declining; leaves linear, 
ort, smooth; heads 4—5-flowered, in a long 1-sided raceme; scales of the 
involuere oblong-lanceolate, acute, smooth, or pubescent on the margins. (L. 
secunda, Ell.) — Dry sandy ridges in the middle districts. Alabama o mE 
Carolina. September. — Stem 29 - 39 long. 
$6. L. Chapmanii, Torr. & Gray. Stem tomentose; bite inihi o 
pubescent, linear, rather obtuse; the uppermost very short and bract-like; 
heads mostly 3-flowered, cylindrical, densely spiked ; scales of the involucre lan- 
ceolate, acuminate, smooth; the outer ones much shorter and broader; corolla — 
and very hairy achenium large. — — Dry sandy ridges, no July - Sept. A 
Stem 19 - 29 high, ge 
-7. L. gracilis, Pur. Stem tomentose and somewhat hoary; I 
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