* 
A 
COMPOSITÆ. (COMPOSITE FAMILY.) 243 
Scales of the involucre 5-10, in a single row. Receptacle flat, naked. Ache- 
nia compressed, with winged or thickened margins, armed with the persistent 
rigid style. Pappus none.— Small depressed herbs, with petioled pinnately 
divided leaves, and small sessile or rarely pedunculate heads. 
1. S. nasturtiifolia, DC. Very low and depressed ; leaves on short peti- 
oles, pinnately parted ; the lobes 3-4 on each side, obtuse, entire ; heads sessile ; 
achenia cuneiform, villous at the apex ; the callous margin tuberculate-rugose 
throughout. (Gymnostylis stolonifera, Nutt.) — South Carolina, around Charles- 
ton. Introduced. -Feb.- May. 
70. GNAPHALIUM, L. EVERLASTING. 
Heads many-flowered, discoid ; the exterior and pistillate ones very slender, 
mostly in several rows ; the central ones perfect. Scales of the involucre im- 
brieated, appressed, scarious. Receptacle flat, naked. Achenia terete or more 
or less flattened. Pappus a single row of capillary bristles.— Woolly or downy 
herbs. Leaves alternate, undivided. Heads in crowded spikes or corymbs. In- 
volucre colored. 
1. G. polycephalum, Michx. Stem woolly, white, branching above; 
leaves linear, sessile, undulate, whíte beneath; heads corymbose; scales of the 
involucre white, obtuse. — Old fields, common. Sept. and Oct. @— — 2° 
high. Perfect flowers few. 
2. G. purpureum, L. Woolly or tomentose and hoary throughout; 
Stems branching at the base, ascending, simple; lowest leaves spatulate-lanceo- 
late, the upper ones linear; heads in crowded spikes. — Cultivated ground, 
Very common. April-June. (@— Stems 4! - 12! high. 
\ 
71. ANTENNARIA, Gert. EVERLASTING. 
Heads many-flowered, dicecious, discoid ; the corolla of the sterile flowers 5- 
cleft; of the pistillate ones filiform. Scales of the involucre imbricated, scarious, 
colored. Receptacle convex or flat. Achenia nearly terete. Pappus a single 
Tow of capillary bristles, which, in the staminate flowers, are thickened at the 
Apex.— Perennial downy or woolly herbs, with alternate entire — and 
Corymbose rarely single heads. 
.l A. margaritacea, R. Br. Stem corymbose above, woolly; leaves 
linear-lanceolate, with revolute margins, tomentose; heads corymbose ; invo- 
lucre white. — Upper districts of North Carolina, and northward. Sept. and 
Oct. — Stem 19 — 2° high. 
2. A. plantaginifolia, Hook. Stoloniferous ; stems scape-like ; radical 
leaves spatulate or obovate, hoary, becoming smooth above, 3-ribbed ; those of 
the stem few, linear or lanceolate ; heads small, in a terminal cluster, sometimes 
single and larger ; involucre white or purplish. cese 
bine: a pris 
