27. COMPOSITE. 



83 



involucre (in South Australian 

 specimens) ; akenes subcylindri- 

 cal, downy, narrowed to a neck 

 at the summit and then expand- 

 ing into a limb which supports 

 the pappus. 



This well-known weed, intro- 

 duced into South Australia about 

 1850, lias now spread all over the 

 settled districts of this State, 

 Victoria, and New South Wales. 

 It delights in cultivated ground, 

 but also inhabits roadsides and 

 rock.y slopes. — Mar.-Apl. — Medi- 

 terranean region, extending in 

 France as far north as Paris. 

 Grows in "stony and uncultivated 

 places" (Coste. Fl. de la France, 

 ii.. 314). 



4. TAN.^CETUJr, L. 



Involucre hemispherical with 

 overlapping bracts; all flowers 

 tubulaj-, yellow; style-branches truncate 

 base ; akenes ribbed, witli a membranous 



nula graveolens. 



)lunt at 



anthers 

 crown. 



Plant tomentose ; 



Plant glabrous ; 



pinnatifid 



leaf-segments 

 leaf-segments 



pmnatisect 

 toothed or 



T. hiironensf 1 

 T. r II /{fare 2 



Tanacetum huronense. 



ronense, Fischer. Stout, erect, 

 tomentose, strongly scented 

 perennial herb, with creeping 

 rootstock ; leaves oval-oblong in 

 outline, more t)r less white- 

 tomentose. especially beneath, 

 finely bipinnatisect, the axis 

 winged and furnished with 

 small toothed lobes between the 

 iuear - oblong segments, the 

 secondary .segments or lobes con- 

 cave, incised and shaiply tooth- 

 ed, the stem-leaves sessile; heads 

 in a close corymb ; involucral 

 bracts stiff, the middle ones 

 keeled, oval, with broad scarious 

 tips, the innermost narrower ; 

 central flowers 5-toothed, the 

 outer row female, 3-tootlied ; 

 central akenes 5 ribbed, the outer 

 ones 3-angled. 



Green Hill Road. — Jan. -Mar. ^ 

 North America. 



