176 WEEDS AND USEFUL PLANTS. 
1. I. Hele’ beg L. Stout ; ej leaves large, oblong ovate, those 
of the ste clasping ; akenes 4-sid 
eines 
Stem 3-5 feet high, sulcate, branching above. Leaves 9 -18 inches long, and 4-8 inches 
wide, acute or Sey ap denticulate, nas ee beneath,—the radical ones petio- 
Outer scales of the Saere Aarne po oduced at the base into 
two tails, or ss like appenda; valegaee x ; pappus pale tawny. 
Roadsides Naturalized free pie Diy Aug 
medicine, but is now seldom used ; and prpertorninal 
those medicines are called which A Yog the Sedtions of the throat. 
8. AMBRO’SIA, Tournef. Rac-weEep. 
[Poetically , Food of the Gods ; in this case a0 id like Lucus, a 
lucendo.] 
Sterile and fertile flowers in different heads on the same plant; 
lS staminate in terminal racemes reg Seite the pistillate me at 
: nvo- 
a the 
flat ttish, usually with filiform chaff among the florets. PisTmLaTe 
Inv. lucre globose-ovoid or turbinate, closed, acuminate, usually with 4 
es near i wered. or 
eg subglobose or obovoid. Annual herbs. Leaves lobed, or pinnati- 
fidly d issected. 
1 A. trifi’da, Z. Stem tall and stout, hairy and rough ; leaves mostly 
— alata 3—5-lobed, hairy, scabrous,—the lobes oval lanceo- 
late, acuminate ; petioles ‘narrowly winged, ciliate ; racemes dongated, 
panic teal . 
Tririp Amprosta. Great Rag-weed. 
Stem 3-6 or 8 feet high, branched. Leaves 4- petioles 1-2 inches 
con a ——— Baits wat oh nomena, a4 see pi = peas racemes 
heads at the base of the ‘racemes ; the involucre tu rbinate-obuvoid, 
an a Sobical apex, pile tanga ribs terminating in So" many pointed tubercles round the 
base of the conical acumina’ 
Low grounds. and was‘ afaeenap ; Canada to Georgia. Fl. August. Fr. October. 
is coarse ugly weed is sufficiently common, and worthless, to 
entitle ‘it to the ee of every farmer who desires to keep his premises 
clear of suc! 
2. A, arte: li Stem baieuiately branched villous ; 
leaves oe ish above, somewhat beneath,— 
the uppermost simply pinnatifid ; petioles cilia ey paring long amg 
somewhat spicate, paniculate 
ARTEMISLA-LEAVED AMBROSIA. Biiter-woed. Rag-weed. 
