RUDBECKIA. LXXV. COMPOSITZ. 337 
. 29. HELIOPSIS. 
Gr. i)dc0s, the sun, ois, appearance; flowers radiant like the sun. 
Involucre imbricate, with ovate, subequal scales ; rays linear, large, 
@; disk %; receptacle chaffy, conical, the paleze lanceolate ; achenia 
4-sided ; pappus 0.—% Lvs. opposite. Hds. large. Fs. yellow. 
H. tevis. Pers. (Helianthus. Linn.) Oz-eye. 
St. smooth; lvs. ovate-oblong, coarsely serrate, petiolate, 3-veined, smooth 
beneath, upper ones usually lanceolate, lower ones more or less truncate at 
base.—A large, symmetrical plant, in hedges and thickets, U.S. Stem an- 
gular, striate, di- or trichotomously branched above, 3—5f high. Leaves 2—6’ 
by 1—4’, acute, distinctly 3-veined. Branches thickened at the summit, each 
terminating with a large, solitary, yellow head. Rays lanceolate, broad at base 
and obtuse at summit. June, Jl. 
B. gracilis. T. & G. (H. gracilis. Nuit.) Small and slender; lvs. scabrous, 
ovate-lanceolate, acute at base.—2f high. 
y-. scabra. T. & G. (H.scabra. Hook.) St. and vs. scabrous and yellowish- 
green; lvs. somewhat deltoid, distinctly truncate at base-—6f high. Common 
in Ia.! 
30. RUDBECKIA. 
Dedicated to the celebrated Olaus Rudbeck, prof. of Botany at Upsal, Sweden. 
Involucre scales nearly equal, leafy, in a double row, 6 in each; 
ray-flowers neutral; disk perfect; receptacle conic, with unarmed 
palez or chaff; pappus 0, or a 4-toothed margin ——%4 Lws. alternate. 
ds. large. Rays yellow. 
> 
* Disk pale green or purplish. 
1. R. LAcIniéta. 
' Glabrous ; lower lvs. pinnate, segments 3-lobed, wpper ones ovate; pappus 
crenate—In the edges of swamps and ditches, Can. and U. S. A tall, showy 
plant, resembling Helianthus, from which, however, it is readily distinguished 
by its conical disk. Stem round, branching, 6—8f high. Leaves alternate, 
ample, rough, upper ones generally ovate, the rest variously divided, toothed or 
cut, petiolate. Flowers large, terminal. Rays 1—2’ long, oblanceolate, bright 
yellow, spreading or drooping. Aug. 
2. R.-suBTOMENTOsA. Ph. 
S¢. branching, tomentose-pubescent ; Jvs. petiolate, hispid-scabrous above, 
softly subtomentose beneath, serrate, the lower deeply 3-lobed or 3-parted, up- 
per undivided, ovate, acuminate; Ads. corymbose; scales numerous, spreading ; 
disk purplish-brown; rays large, spreading.—A coarse, rough species, 3—4f 
high, prairies, &c., Western and Southern States. Stem angular, marked with 
brown lines. Leaves 3—5’ long, on petioles 1—24” long. Rays deep or orange 
yellow, 10—15, about 1’ long. July, Aug. 
_ ** Disk dark purple. 
3. R,. TRILOBA. 
Hirsute; branches panicled, spreading; lower cauline lvs. mostly 3-lobed, 
coarsely serrate, acuminate; wpper ovate-lanceolate, somewhat clasping, ser- 
rate or entire; radical ones ovate or oval, obtuse, crenate-dentate or incisely 
lobed, petiolate; Ads. rather small, disk dark purple, ovoid; rays about 8, broad- 
oval, rather longer than the linear, reflexed scales.—Fields, Middle and Western 
States. A handsome species, 2—4f high, very branching. Leaves 2—4’ long, 
3-veined. Rays deep yellow, 6—10" long, 3 as wide. Chaff cuspidate-awned 
at the summit. . Aug. Sept. 
4. R. wirta. Rough Cone-flower. 
Very hirsute or hispid; st. simple or somewhat branched; ped. naked; 
lws. ovate-spatulate, 3-veined, petiolate, denticulate, the upper ones sessile, 
ovate-lanceolate ; invol. scales numerous, narrow, imbricated in 3 rows; rays 
spreading.—A showy plant, in dry soils, Mass. Rickard! Western N. Y.! to 
La. and Ia.!_ Stems subsimple or branching from the base, covered with prickly 
