470 COMPOSITAE. Vor. LIL. 
1. Rudbeckia triloba L. Thin-leaved 
Cone-flower. Fig. 4442. 
Rudbeckia triloba L. Sp. Pl. 907. 1753. 
Stem somewhat pubescent and rough, rarely 
glabrate, branched, 2°-5° high. Leaves thin, 
rough on both sides, bright green, the basal 
and lower ones petioled, some or all of them 
3-lobed or 3-parted, the lobes lanceolate or ob- 
long, acuminate, sharply serrate; upper leaves 
ovate, ovate-lanceolate, or lanceolate, acumi- 
nate or acute, narrowed to a sessile base or 
into short margined petioles, serrate or entire, 
2’-4’ long, 4’-1’ wide; heads nearly 2’ broad, 
corymbed; bracts of the involucre linear, 
acute; pubescent, soon reflexed; rays 8-12, 
yellow, or the base orange or brownish-purple; 
disk dark purple, ovoid, about 6” broad; chaff 
of the receptacle awn-pointed; pappus a mi- 
nute crown. 
In moist soil, New Jersey to Georgia, west to 
Michigan, Minnesota, Missouri, Kansas and Louisi- 
ana. Sometimes escaped from gardens to road- 
2. Rudbeckia subtomentésa Pursh. Sweet 
Cone-flower. Fig. 4443. 
Rudbeckia subtomentosa Pursh, Fl. Am. Sept. 575. 1814. 
Densely and finely cinereous-pubescent and scabrous; 
stem branched above, 2°-6° high. Leaves thick, some 
or all of the lower ones deeply 3-lobed or 3-parted, 
petioled, 3’-5’ long, the lobes oblong or lanceolate, acute 
or acuminate, dentate; upper leaves, or some of them, 
lanceolate or ovate, acuminate, sessile or nearly so; 
heads numerous, 2-3’ broad; rays 15-20, yellow, or 
with a darker base; disc subglobose, rounded, purple 
or brown, 6”-8” broad; bracts of the involucre linear- 
lanceolate, acuminate, squarrose, sweet-scented; chaff 
of the recéptacle linear, obtuse or obtusish, pubescent, 
or somewhat glandular at the apex; pappus a short 
crenate crown. 
On prairies and along rivers, Illinois to Louisiana, Kan- 
sas and Texas. July—Sept. 
3. Rudbeckia hirta L. Black Eyed Susan. 
Yellow Daisy. Fig. 4444. 
Rudbeckia hirta L. Sp. Pl. 907. 1753. 
Hirsute or hispid throughout, biennial or some- 
times annual; stems simple or sparingly branched, 
often tufted, 1°-3° high. Leaves thick, sparingly 
serrate with low teeth, or entire, lanceolate or ob- 
long, the lower and basal ones petioled, mostly ob- 
tuse, 3-5-nerved, 2-7’ long, 3-2’ wide, the upper 
sessile, narrower, acute or acutish; heads commonly 
few or solitary, 2’-4’ broad; rays 10-20, orange or 
orange-yellow, rarely darker at the base; bracts of 
the involucre very hirsute, spreading or reflexed, 
much shorter than the rays; disk globose-ovoid, 
purple-brown; chaff of the receptacle linear, acute 
or acutish, hirsute at the apex; style-tips acute; 
pappus none. 
Prairies and plains, Ontario to Manitoba, Florida, 
Colorado and Texas. Widely distributed in the east as 
a weed, north to Quebec. Races differ in pubescence 
and in length and color of the rays. Nigger- or darkey- 
i N head. Nigger- or poor-land daisy. Golden-jerusalem. Yel- 
low ox-eye-daisy. English bull’s-eye. Brown daisy or betty. Brown-eyed susan. May-Sept. 
Rudbeckia monticola Small, of the southern Alleghanies, with broader, ovate, acute or acumi- 
nate stem leaves, is recorded as extending northward into Pennsylvania. 
