Baccharis. COMPOSITiE. 369 



1. Baccharis halimifolia, Linn. Groundsel-bush. 



Frutescent, smooth, minutely scurfy ; leaves obovate, incisely toothed above, cuneate at the 

 base, and attenuate into a short petiole ; heads of the sterile plant somewhat globose, solitary 

 or aggregated , of the fertile ovate-oblong, panicled ; scales of the sterile involucre ovate, the 

 inner ones elongated in the fertile. — Linn. sp. 2. p. 860 ; Michw. Jl. 2. p. 125 ; Piirsh,fl. 2. 

 p. 523 ; Ell. sk. 2. p. 319 ; Duham. arh. (ed. 2.) 1. <. 60 ; Torr. compend. p. 288 ; DC. 

 prodr. 5. p. 412 ; Torr. ^ Gr. Jl. N. Am. 2. p. 258. 



Stem 6-10 feet high, branched ; the branches erect and angled, clothed (as well as the 

 leaves) with very minute grayish scales, often e.xuding (particularly at the insertion of the 

 leaves) a pale resinous substance. Leaves alternate, 2-3 inches long and 1-2 inches wide, 

 thick and somewhat coriaceous, angularly toothed ; the uppermost oval or lanceolate, and often 

 nearly or quite entire. Heads in the sterile plant sessile, mostly aggregated at the summit of 

 leafy branches ; in the fertile loosely paniculate. Scales of the involucre closely imbricated, 

 glutinous. Anthers very large. Pappus of the sterile plant plumose and somewhat pencillatc ; 

 of the fertile very long and slender, simple. 



Sandy beach of Long Island. September - October. 



Subtribe IIL Tarciionanthe^, Less. Heads discoid, never radiate, dicecious or hetero- 

 gamous ; the fertile flowers tubular-filiform, mostly truncate ; when heterogamous, 

 bearing the perfect or staminate flowers in the centre. Receptacle sometimes chaffy. 

 Anthers caudate at the base. — Leaves alternate. 



14. PLUCHEA. Cass. bull, philom. 1817, p. 31 ; DC. prodr. 5. p. 449 ; Endl. gen. 2414. 



MARSH FLEABANE. 

 [ Named in commemoration of Noel Pluche, author of " Spectacle do la Nature, &c." and other works,] 



Heads many-flowered ; the central flowers mostly perfect but sterile, dilated and 5-cleft ; the 

 others filiform, pistillate, in many series, truncate or minutely 2 - 3-toothed. Involucre 

 imbricated. Receptacle flat, mostly naked. Anthers bicaudate. Style in the central 

 flowers entire or minutely 2-toothed. Achenia somewhat cylindrical, angular or grooved. 

 Pappus capillary, in a single series, slightly rough. — Mostly herbaceous and glandular 

 plants, emitting a strong terebinthine and rather disagreeable odor. Leaves oval or oblong, 

 serrate. Heads in crowded compound corymbs. Flowers mostly purplish. 



1. Pluchea camphorata, DC. Seaside Marsh Fleabane. 



Annual, minutely viscid-pubescent ; leaves oblong-ovate or lanceolate-ovate, very acute, 

 nearly sessile, rcpandly serrate, minutely pubescent and sprinkled with resinous dots ; corymbs 

 fastigiate ; scales of the involucre pubescent and viscid, ciliatc. — Torr. ^ Gr. fl. N. Am. 2. 

 [Floka.] 47 



