COML'OSITE FAMILY. 241 



18. BACCHARIS. (Dedicated to i>rtrc/i!(.s.) Shrubby seaside or pinc- 

 baiTon plants, (p. 224.) 



B. halimif6lia, Linn. Smooth, somewhat scurfy, G°-12'^, tlie brandies 

 angled ; leaves obovate, petioled, coarsely toothed or the upper ones 

 entire ; heads of whitish or yellowish flowers scattered or in leafy pani- 

 cles. Mass., S. 



19. PLUCHEA. (The Abbe Pluche, a naturalist of a century ago.) 

 Cp. 22;].) 



P. bifrons, DC. Leaves oblong to lanceolate, closely sessile or clasp- 

 ing, veiny, 2'-::!' long. 2*^-80. 2!. Cape May, S. 



P. camphorata, DC. Pale ; leaves oblong-ovate or lanceolate, thick- 

 ish and unly obscurely veiny, the larger ones short-petioled. Taller. 

 Salt marshes, Mass., S. 



20. FILAGO, COTTON ROSE. (Latin: Jilum, a thread, from the 

 cottony hairs.) (p. 223.) 



F. Germdnica, Linn. Hkrha Impia of the old herbalists — the bi-anches 

 with a new generation of clustered heads rising out of the parent cluster 

 at the top of the stem (as if undutifully exalting themselves) ; stems 5'- 

 ]()' high, crowded with the lanceolate, erect, and entire cottony leaves. 

 Old dry fields from N. Y., S. ; flowers summer and autumn. ® 



21. GNAPHALIUM, EVERLASTING, CUDWEED. (Greek: lock 

 of loool.) (p. 223.) 



» Scales of the invohicre irhtte or ydhncish-xvliite ; stem erect, P-2° high ; 

 Ik ads manij, corymbed. Common in old fields., copses, etc. 



G. polycephalum, Miclix. Leaves lanceolate, with narrowed base 



and wavy margins, the upper surface nearly naked ; the perfect flowers 

 few in thf center of each head. ® 



G. decurrens, Ives. Common from N. J. to Mich, and N. ; leaves 

 lance-linear, cottony both sides, the base partly clasping and extending 

 down on the stem ; nmny perfect flowers in the center of each head, il 



* * Scales of the involncre taivny-purplish or trhitish, not at all slunnj or 

 petal-like; heads small, crowded in sessile clusters ; stems spreading or 

 ascending, 3'-20' high. ® 



G. uligin63iim, Linn. An insignificant little weed in wet places, espe- 

 cially ri);iilsiilrs, with lanceolate or linear leaves, and inconspicuous heads 

 in terminal clusters. 



G. purptireum, Linn. Taller, with oblong-spatulate or lanceolate 

 leaves green above and white-cottony beneath, and purplish heads in 

 axillary clusters, or spiked along the upper part of the stem ; pappus 

 plumes united at the base, and ail falling off together. Coast of Me., S. 



22. ANTENNARIA, EVERLASTING. (Name from the pappus of 

 the staminate fiowers, which resembles the antennce of certain insects.) 



:u (p. ^^23.) 



A. plantaginif6lia. Hook. Growing in patches, spreading by runners 

 and olfs( ts ; the root leaves spatulate or obovate and tufted; flowering 

 stems 4'-8' high, with few and small lanceolate leaves; heads in a small 

 corymb, the firtile ones (pointed, with pinkish styles) with narrow and 

 acutish, the staminate (flat-topped) with white and rounded scales. 

 Sterile soil ; common. 



gray's f. f. & G. noT. — 10 



