(seq. 21)

Phaethusa
1. americana
Verbesina
1. virginica
#220 x 2. siegesbeckia
Buphthalmum
# 1. frutescens
—# —x 2. helianthoides
Helianthus
1. multiflorus
2. pubescens
225. x 3. mollis
x 4. trachelifolius
5. decapetalus
x 6. frondosus
7. strumosus
8. prostratus
9. giganteus
10. altissimus
# 11. angustifolius
x 12. divaricatus
235. # 13. atrorubens.
Galardia [Gaillardia]
1. bicolor
2. fimbriata
Rudbeckia
x 1. laciniata
2. digitata
240 x 3. triloba
4. hirta
x 5. fulgida
6. spathulata
7. amplexifolia
245 8. purpurea

9. angustifolia
Coreopsis
# 1. verticillata
2. tenuifolia
3. trichosperma
250 4. aristata
5. mitis
6. aurea
7. tripteris
# 8. senifolia
x 9. auriculata
# 10. lanceolata
11. crassifolia
12. latifolia
13. angustifolia
260. x 14. alternifolia
15. procera.
==
Baltimora
1. recta.
Silphium
1. laciniatum
# 2. compositum
265. 3. therebinthinaceum [terebinthinaceum]
x 4. perfoliatum
5. connatum.
# 6. asteriscus
#? 7. pumilum
270.8 integrifolium
9. trifoliatum
10. ternatum
11. atropurpureum