2. Rudbeckia Subtomentosa 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 receptacle linear, obtuse or obtusish, pubescent, or somewhat glandular at the apex; pappus a short crenate crown.

On prairies and along rivers, Illinois to Louisiana, Kansas and Texas. July-Sept.

2 Rudbeckia Subtomentosa Pursh Sweet Cone Flower 11142 Rudbeckia Subtomentosa Pursh Sweet Cone Flower 1115

3. Rudbeckia Hirta L. Black Eyed Susan. Yellow Daisy

Fig. 4444

Rudbeckia hirta L. Sp. Pl. 907. 1753.

Hirsute or hispid throughout, biennial or sometimes annual; stems simple or sparingly branched, often tufted, 1°-3° high. Leaves thick, sparingly serrate with low teeth, or entire, lanceolate or oblong, the lower and basal ones petioled, mostly obtuse, 3-5-nerved, 2'-/ long, -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-head. Nigger-or poor-land daisy. Golden-jerusalem. Yellow 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 acuminate stem leaves, is recorded as extending northward into Pennsylvania.

4. Rudbeckia Brittonii Small. Britton's Cone-Flower

Fig. 4445

R. Brittonii Small, Mem. Torr. Club 4: 130.. 1894.

Stem stout, hispid, erect, 11/2°-2 1/2° high, simple, grooved, leafy, at least below. Leaves serrate or crenate-serrate, strigose-pubescent, the basal ones ovate to ovate-lanceolate, 3-4' long, obtuse, long-petioled; stem leaves obovate to oval, often with a lateral lobe, the petioles wing-margined; uppermost leaves often ovate-lanceolate, sessile, cordate; bracts of the involucre foliaceous, often 1' long or more; head 2'-3' broad; rays about 12, 2-lobed; outer chaff oblanceolate, the inner linear, acute, purple-tipped, fringed with jointed hairs; style-tips slender, acute.

In woods, Pennsylvania to Virginia and Tennessee. May-July.

4 Rudbeckia Brittonii Small Britton s Cone Flower 11164 Rudbeckia Brittonii Small Britton s Cone Flower 1117