(2, se asuer (L.) All. ————* Weedy annual herbs 80-150 cm. tall or more, 
; glabrous and glaucous with prickly herbage, the lower leaves obovate to 
jhe 
Cam. 
eS 
SPIE eet 
Spatulate, narrowed to indefinite petioles, sharply a bed, the 
teeth tipped with spines, the upper leaves oblanceolate to blong, sessile 
and clasping at the base, more or less triangular at the apex, pinnately and 
irregularly lobed, the lobes more or less deltoid, the margins spinose-dentate 
with teeth 2-4 mm. tall; inflorescence glandular with conspicuous stalked 
glands, formed of a series of panicled, ample, umbels; heads ovoid in flower, 
hemispherical in fruit, their involucres 10-15 mm. tall; flowers yellow; 
achenes strongly flattened, elliptical, 3-ribbed; 2-2.5 mm long. 
#f2_gsional as a weed in waste places and on newly surfaced ground. 
ees 
“Yw H ——? Lamb Creek, Epling ana nouck 10255. 
am Se oleraceus L. ~~~? Weedy annual herbs 60-100 cm. tall or more, 
their basal leaves prevailinsly lyrate, the terminal segment very much larger 
than the one or two pairs of lateral segments, deltoid but with convex marcins, 
the lower stem leaves similar, the terminal segment more angular, the lateral 
Segments better developed, soon passing into oblanceolate y pinnatifid leaves 
with acute deltoid lobes, these in turn passing into oblong or lanceolate, merely 
toothed leaves, the stem leaves mostly sessile and clasping with rounded auricles, 
the margins of all sharply toothed with triangular very sharp but hardly .spinose 
teeth 2-4 mm. tall or more; heads in irregular umbels which are usually glabrous; 
bracts 10-12 mm. long, lanceolate, acute; corollas yellow, 15 mm. long; achenes 
scarcely 35 mm. long, somewhat paprilose. 
Occasional as a weed in waste places. 
V 
