412 COMPOSITE, (composite family.) 



1. EUPATORIUII, L. Thoroughwort. Boneset. 



Heads discoid. Flowers all perfect, funnel-shaped. InTolucre 

 cylindrical, more or less imbricated. Receptacle naked. Branches of 

 style long, terete. Akenes ribbed. Pappus a single row of hairs — 

 Perennial herbs, woody at base, with purplish flowers and opposite 

 leaves. 



E. caiinabinum, L. If 1 or more, puberulent ; branches few, 

 opposite. Leaves often ternate ; leaflets lanceolate, tapering at base, 

 serrate. Heads 5-6-flowered ; scales of involucre about 10, nearly in 

 two rows, oblong, obtuse, the outer much shorter — July to September 

 — Ditches and banks of streams ; common to subalpine regions. 



Var. iSyriacum, Jacq. Leaflets ovate-lanceolate to ovate, short- 

 tapering at base — Common. 



Var. inctivisiim, Boiss. Leaves all undivided, ovate-oblong, 

 short-tapering or rounded at base. — Less common. 



2. §OL.IDAOO, L. Golden-Rod. 



Heads radiate. Rays of one color, in one row, pistillate. Disk- 

 flowerets perfect, 5-toothed. Involucre imbricated. Receptacle naked. 

 Akenes beakless, nearly terete. Pappus consisting of a single row of 

 scabrous bristles — Perennial herbs, with yellow, radiate flowers. 



S. Vir^a-aurea, L. If .6 to 1, or more ; stem terete, erect, 

 ending in a naked or leafy panicle. Leaves ovate to oblong-lanceolate 

 and lanceolate, acute to acuminate, the lower serrate. Heads .01 long ; 

 scales of involucre unequal, loose, lanceolate to linear ; rays 8-9, el- 

 liptical-oblong, once and a half to twice as long as involucre — August 

 to October — Woods of subalpine Lebanon, Antilebanon, and Amanus, 

 and northward. 



3. SELiLIS, L. Daisy. IqJmuiodn. 



Heads radiate, rays in one row, strap-shaped, white to pink or 

 variegated, pistillate ; disk flowerets tubular, perfect. Scales of in- 

 volucre in one or two rows, leaf-like. Receptacle naked, conical, 

 akenes flattened, obovate, destitute of pappus — Low, annual or peren- 

 nial herbs, with solitary flowers. 



* Leaves rosetted at hase. Flowers .02 to .03 hroad^ on scape-like 

 peduncles. 



1. B. perenni§, L. If .2 to .3, more or less appressed papil- 

 lose-hairy. Leaves obovate-spathulate, more or less abruptly tapering 

 into a petiole, l-nerved^ entire or somewhat crenate. Scales of involu- 

 cre oblong, obtuse — Throughout the year — Common except in alpine 

 regions and deserts. 



2. B. sylve§tris, Cyr. 2f .2 to .3, more or less white-papillose. 

 Leaves oblong-spathulate, gradually tapering to a petiole, 'd-nerved, 

 entire or denticulate. Scales of involucre obloug-lanceolate, some- 

 times acutish — Throughout the year — Common except in Alpine 

 regions and deserts. 



* * Stem leafy, rarely scape-like. Flowers .005 to .015 Iroad. 



3. B. anuua, L. .05 to .1, sparingly hairy ; stems simple 

 or slightly branched. Lower leaves obovate-spathulate, abruptly taper- 



