448 COMPOSITAE, Von. 1H, 
2. Pluchea camphorata (L.) DC. Spicy or 
Salt-marsh Pleabane. lig. 43or. 
Erigeron camphoration lL. Sp. PL Wd. 2, pata, 1703. 
Conysa marilandica Michsx, FL Bor, Am, a: 120, 1Rog, 
Piichea camphorata DC. Vrodr 5: 45. (836. 
Root annual; stem usually branched, finely visetd- 
pubcrulent, or nearly glabrous, 2°=3° high, somewhat 
channeled. Leaves ovate, oblong or lanecolate, pu- 
berulent or glabrous, acute or acuminate at the 
apex, narrowed at Che hase, short-petioled, or the 
upper sessile but not clasping, 3’-8" long, 13! wide, 
serrate or denticulate, not conspicuously reticulate- 
veined; heads about 3” high, rarely leafy-bracted, 
mostly in naked open corymbiform cymes; bracts 
of the involuere ovate-hinecohkite, or laneeolite, 
acute, puberulent; flowers purplish; achenes pubes- 
cent. 
Tn salt marshes, coast of Massachusetts to Florida, 
Texas and Mexico. Called also ploughiman's wort. 
Auge-Oct. 
3. Pluchea petiolata Cass. Inland Marsh I*lea- 
bane. I"ig. 432. _ 
Pluchea petiolata Cass, Dict. Sci, Nat. 42: 2. 1826. Nath 
Pluchea foetida DC, Prodr. §: 452. 1830. 
Similar to the preceding species, but glabrate, darker 
green, usually taller, 24°-4° high, the stem stout, rather 
strongly channelled, Leaves ovate-linceolate to oval, 
thin, 4’-10’ long, 14’-3" wide, mostly acuminate at the 
apex, cuneate-narrowed at the hase, long-petioled, ir- 
regularly serrate; petioles of the larger leaves 8-12” 
- long; heads 2’-24” high, in terminal and often also 
axillary clusters; bracts of the involucre granular, cil- 
iate; achenes short-pubescent. 
In moist soil, often in woods, Maryland to Florida, Tlli- 
nois, Missouri and Oklahoma. Aug. Oct, 
43. ANTENNARIA (Giacrtn. Mruct. & Sem. 2: 410. pl. 167. 1701. 
Perennial woolly dioecious or polygamo-dioccious herbs, with alternate and bagal leaves, 
and small discoid many-flowered heads usually capitate, glomerate or corymbose,  Involucre 
oblong, ovoid or campanulate, its bracts scarious, imbricated in several series, the outer 
shorter, usually woolly. Receptacle convex, or nearly flat, foveolate, not chaffy. Staminate 
flowers with a truncate or minutely dentate corolla, usually undivided style and scanty pappus 
of club-shaped smooth or minutely barbed bristles, Pistillate or perfect flowers with tubular 
mostly 5-toothed corollas, 2-cleft style, and copious pappus of capillary naked bristles, slightly 
united at the base, the style often crimson, Achenes oblong, terete, or slightly compressed, 
[Latin, in allusion to the fancied resemblance of the sterile pappus to insect antennae. | 
About 50 species, natives of the north temperate zone and southern South America. Tn addi- 
tion to the following, many others occur in the western parts of North America, The patches of 
fertile and sterile plants are usually quite distinet, and the sterile plants of some species are much 
Jess abundant than the pistillate, Perfect achencs are, however, abundant, parthenogenesis being 
a known feature of this genus, Type species: Antennarta dioica (1) Gaertn, 
