180 WEEDS AND USEFUL PLANTS. 
3-lobed, armed at base sith slender 3-parted spines; involucre of the 
fruit srliadeicotbne: with an cee ous beak. 
Srinose Xanruium. Thorny Clot- 
Stem 2- 3 or 4 feet high, branched. Leaves 5 inches long, “and one-fourth to three- 
fourths of an inch wide, entire or with a lobe-like t ,—— the upper surface 
green, werent on the midrib—the under surface clothed with a short ——= 
tomentum , food HG narrowed to a short petiole—on cael side of which is a triple 
3-forked spine, th e tirmnches aa an inch long, very sharp, yellowish or pale straw reolok. 
Heads of towers sar gas! hg 
Farm-yards, road-sides, og = Massachusetts to Georgia: introduced. Native of Eu- 
rope. FL. September. Fr. October 
execrable eee: believed to have originated in tropical 
Ameri rea now — a rie through various parts of the old 
world, is "becomin ng naturali feed j many portio ns of our country,—par- 
ticular rly in the Senile States It may be frequently seen along the 
side-walks, and waste places, in the suburbs of our northern sea-po 
Wns. —and i is a vile nuisance whiner found. I have understood that 
the authorities of one of our cities, a few years since. ag d an Ordi- 
e 
plan 
name of the Canada Thistle! The misnomer probably didnot impair 
the efficacy of the Ordinance : yet I cannot help thinking it would be 
decidedly eens that both lawgivers and farmers ye avoid 
confounding obj which are cenenitialiy “distinct, —and learn to desig- 
ate even weeds by their proper names. 
10. RUDBEC’KIA, L. Conz-rLower. 
[in honor of Olaus Rudbeck, father and son ; Sweedish botanists. } 
Heads pean -flowered ; ray-florets neutral. Involucral scales in about 2 
, olumnar ; chaff short, 
conical, not rigid. Akenes es 4-angled, smooth ; pappus a minute crown- 
like order. “Chiefly perennials ; leaves alternate ; rays yellow, generally 
long and drooping. 
1B. hir’ta, LZ. Hirsute ; lower leaves rs rn petiolate, upper ones 
ovate-lanceolate, sessile ; disk conical, dark purple. 
Rover-narrep RupBEcKIA. 
Perennial? Stem 134-4 feet high, rathe er stout, often simple or branched near the 
base. Leaves 2-3 inches heals n hirsute petioles 1- ids av tre 
fi middle-sized, on ~— conti 6 elrtite sulcate naked peduncles ; 
the receptacle sublinear, rather ac dae and ciliate at the summit. 
Fields and in dry soil. ¥ —Septern mber 
Obs. This is of late nici rather — i iat ag lands, wat 
cannot fail to - the notice of sg farm er species which 
nearly resembles it, R, ful’gida, Ait., is also Teand i 7 nani situations ; 
the latter has opus pot and smooth chaff to the receptacle. But, 
little is known of their cter as weeds, but they have snparil an 
ching belies pay should be eradicated. : 
