ORDER LXVIII. COMPOSITE. 379 



3. P. camphora'ta, (Ell.) Stem herbaceous, succulent,, slightly pu- 

 bescent. Leaves ovate-lanceolate, acute, denticulate. Flowers in axil- 

 lary terminal corymbs, shorter than the leaves; scales of the involucre 

 acute, ns long as the florets. This plant, when bruised, gives out a 

 btrong, disagreeable odor. — Purple. If. Aug. — Sept. Sait marshes. 



Marsh Flea-bane. 



4. P. Maryland'ica, (Mich.) Stem erect, rather succulent. Leaves 

 ovate-lanceolate, denticulate, pubescent. Flowers in corymbs, scales of 

 the involucre bnear or ovate. Seeds minute ; pappus short, consisting 

 of 20 — 30 ray* — Purple. %. July — Aug. On the coast of Car. and Geo. 



Genus XXX.— PTEROCAU'LON. Ell. 

 (From pteron, a ring, and kaulon, a stem.) 



Involucre imbricate, leaflets somewhat obovate, acute, ap- 

 pressed, tomentose. Flowers pistillate and perfect, intermin- 

 gled, the pistillate ones slender, with the border 3-toothed ; the 

 perfect ones with the border 5-cleft. Anthers very short. Style 

 2-cleft. Stigmas glandular. 



1. P. pycnosta'ciiyum, (Ell.) Stem erect, simple, winged, densely to- 

 mentose, whire. Leaves lanceolate, sessile, decurrent, dentate, white, 

 tomentose beneath. Flowers in compact spikes ; involucre densely to- 

 mentose. Seeds angled, pubescent; receptacle naked. — White. 11. 

 May — Aug. Dry sandy soils. 1 — 2 feet. 



Genus JIXXL— BUPHTHAL/MUM. L. (Borrichia, Adans.) 

 (From Oo-i ;, a bull, ophthalmos, the eye, from the resemblance of its flowers.) 



Involute many- leaved ; florets of the disk 5-cleft, perfect, 

 numerous, those of the ray pistillate. Seeds winged. Papjjus 

 4-loothed, or an obsolete margin. Receptacle chaffy. 



1. B. frltes'cens, (L.) Stem erect, glabrous, branching, pubescent 

 toward the summit. Leaves opposite, sessile, cuneate, lanceolate, glau- 

 cous, sparingly toothed at the base. Flowers solitary, terminal ; in- 

 volucre many-leaved, imbricate. Leaves mucronate, expanding; ray 

 florets lanceolate, 10 — 12; seeds of the ray triangular ; pappus 4-tooth- 

 ed ; chaff pubescent, with a stiff point. — Yellow. ^ or If. June — 

 Oct. On the seacoast. 



2. B. angustifo'lium, (Pursh.) Stem erect, branching. Leaves alter- 

 nate, linear, entire, glabrous; involucre with acute, lanceolate leaves. 

 —Yellow. ^ or %. July — Sept. Southern Geo. and Flor. 



Genus XXXIL— ECLIP'TA. L.. 

 (From ekleipo, deficient, from its wingless seeds.) 



Involucre many-leaved, the leaves nearly equal ; florets of 

 the disk perfect, 4-cleft, those of the ray pistillate ; pappus 

 wanting ; receptacle bristly. 



1. E. ekeo'ta, (L.) Stem erect, strigose ; dichotomous. Leaves op- 

 posite, lanceolate, serrate, or entire, attenuate at the base, 3-nerved, 



