3034 



RUDBECKIA 



RUDBECKIA 



ably well in semi-shade, as under overhanging shrubs or 

 in shady corners such as the north side of a house would 

 afford. They Uke a good open soil. When grown in the 

 open with one stake to the center or main stem, and a 

 string run loosely around the whole plant being, in fact, 

 a string hoop catching the larger outer branches to 



prevent breakage by the 

 wind at the connection 

 with the main stem, they 

 make a very handsome 

 compact plant. If well 

 'soaked at the roots, 

 they may be taken up 

 when in full bloom, and 

 potted in a 10-inch pot, 

 placed in a dark sheltered 

 place over night, and 

 then used for decorative 

 purposes. They remain 

 in good form for a 

 month in a room or on the 

 porch if not in a draft. 

 They may also be taken 

 up carefully and all the 

 soil washed from the 

 roots, and the roots 

 placed in a large vase 

 filled with water, where 

 they present a bouquet 

 arranged as Nature in- 

 tended. An effective fall- 

 flowering group may be 

 formed by using the 

 lighter - colored flower 

 forms of Hibiscus syria- 

 cus such as Totus 

 albus, Lady Stanley, and 

 elegantissima for a cen- 

 ter or background, and 

 interspersing groups of 

 the taller rudbeckias (ex- 

 cept Golden Glow, which 

 is too tall and spreading) and boltonias next to them. In 

 front of these place R. spedosa and R. triloba, with the 

 blue form of Aconitum Napellus, and for a border use R. 

 bicolor var. superba, placed well to the front to be pulled 

 up when its bloom is past. This group will give color 

 from July until frost. The allied Echinacea purpurea 

 and E. angustifolia are well adapted for grouping in 

 open bays in shrubby borders, as their flowers are 

 extremely durable and seem in harmony with such sur- 

 roundings. Rudbeckias are easily increased by seeds, 

 cuttings, or division. (W. C. Egan.) 



3507. Rudbeckia triloba. ( X M) 



ampla, 10. 

 amplexicaulis, 1. 

 bicolor, 4. 

 calif or nica, 11. 

 compacta, 6. 

 conspicua, 5. 



INDEX. 



fulgida, 6. 

 hirta, 5. 

 laciniata, 10. 

 maxima, 9. 

 Newmanii, 7. 

 nitida, 8. 



speciosa, 7. 

 subtomentosa, 3. 

 superba, 4. 

 tri^ba, 2. 

 variabilis, 6. 

 vomerensis, 5. 



A. Base of upper Ivs. cordate-clasping. 



1. amplexicaulis, Vahl. Annual, 1-2 ft. high: rays 

 J^in. long or more, yellow, often with a brown-purple 

 base; disk brownish, finally somewhat cylindrical. 

 Low grounds, La. and Texas. B.B. 3:418. 



AA. Base of upper Ivs. not cordate-clasping. 

 B. Color of disk brown or dark purple: shape of disk 



never cylindrical. 



c. Lower Ivs. deeply 3-cut. 



D. Duration biennial: disk black-purple. 



2. triloba, Linn. Fig. 3507. Biennial, 2-5 ft. high, 

 bright green: Ivs. thin, usually toothed, the lower ones 

 3-lobed : rays 8-10, deep yellow, base sometimes orange 

 or brown-purple: chaff awned. Moist soil, N. J. to 



Mich. S. Ga. to La. and Mo. B.B. 3:415. B.R. 525. 

 G.W. 1, p. 187. Blooms the first year from seed. 



DD. Duration perennial: disk dull brownish. 



3. subtomentdsa, Pursh. Perennial, 2-5 ft. high, 

 ashy gray and densely hairy: Ivs. thick: rays 15-20, 

 yellow, sometimes with a darker base: chaff blunt. 

 Prairies, 111. to Texas. B.B. 3:415. 



cc. Lower Ivs. not deeply 3-cut. 



D. Plants bristly hairy. 



E. Rays Yr-Y^in. long. 



4. bicolor, Nutt. Annual, 1-2 ft. high: Ivs. 1-2 in. 

 long: rays yellow, with a blackish purple base or all 

 yellow. Pine woods or sandy soil, Ark., Texas, and 

 east to Ga. Var. superba, Hort. Haage & Schmidt, 

 has heads 2 in. across: rays yellow above, purplish 

 brown below. Gt. 47, p. 220. S.H. 2, p. 169. J.H. III. 

 63:247. 



EE. Rays 1-2 in. long. 



5. hirta, Linn. BLACK-EYED SUSAN. YELLOW DAISY. 

 Biennial or annual, 1-3 ft. high, simple or branched, 

 hispid: Ivs. 2-5 in. long: rays golden yellow, sometimes 

 orange at base. Dry and open ground; common over 

 wide range and often rather a troublesome weed. B.B. 

 3:416. Gn. 49:154. R. conspicua, Hort., is probably 

 only a garden form with long narrow orange-yellow 

 ray-florets and a black disk. Var. vomerensis, Hort,, 

 differs from the type in having larger fl.-heads with 

 broad ray-fls. which are light canary to golden yellow. 



DD. Plants nearly glabrous. 

 E. Lvs. mostly entire. 



6. fulgida, Ait. Perennial, 1-2 ft. high: Ivs. more or 

 less hairy on both sides, the lower ones 3-nerved: rays 

 12-14, 1 in. long. Dry soil, Pa. to Mo., south to La. 

 and Texas. B.M. 1996. Mn. 6:221. Var. compacta. 



3508. Rudbeckia laciniata. ( X nearly 



