OF ORNAMENTAL PERENNIALS. 
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orange scarlet, with about nine florets in the ray. A very beautiful variety of this, called Aurora, has been 
raised, but the species does not hybridize -with D. variabilis. It was introduced in 1820. 
D. ROSEA, Cav. 
This species, according to some botanists, is the parent of all the velvet-like Dahlias ; and if this is the case, 
it certainly hybridizes and varies freely. Its progeny are also said to be easily distinguished by their 
bipinnate leaves ; but many botanists think that the species now called D. rosea is not the same as that of 
Cavanilles. Introduced in 1804. 
D. ASTRANTI^FLORA, Cav. 
This species is said to be the parent of all those anemone-flowered Dahlias, which are generally supposed to 
be varieties of D. variabilis. It was introduced in 1812. 
D. BARKERII, West et Know., Flor. Cab. 
Very nearly allied to D. glabrata, but having a rough, hairy stem, and not flowering till October. latro- 
duced in 1837- 
GENUS XIII. 
HELIOPSIS, Pers. THE HELIOPSIS 
Lin. Syst. SYNGENESIA POLYGAMIA SUPERFLUA. 
Generic Character. — Involucre many-leaved, imbricated. Re- I (lite, those of the ray ligulate, feminine. Achenia naked at the 
ccptacle conical, paleaceous. Florets of the disk tubular, herroapliro- I apex. 
Description, &c. — The word Heliopsis signifies Resemblance to the sun ; and the genus was established by 
M. Persoon upon H. Icevis, which is a very showy, sun-like looking flower. The other species are less brilliant, 
and not so well deserving of the name. All the species are perennial plants, with opposite leaves, and terminal 
yellow flowers. 
I.— HELIOPSIS L.aEVIS, Pers. THE SMOOTH-LEAVED HELIOPSIS. 
Synonymes. — Helianthus Isevis, Lin.; Buphthalmum helianlhoides, 
tt Herit. ; Silphium Bolidaginoides ; Rudbeckia oppositifolia. 
Engravings. — Bot. Mag. t. 3372 ; and oar fig. 6 in Plate 48. 
Description, &c. — This plant is a native of Mexico, whence it was introduced in 1714. The stem is erect, 
much branched, and somewhat angular ; and tlie flowers are large and showy. It is quite hardy, and it is 
propagated either by seeds or dividing the roots. 
Specific Character. — Stem very smooth. Leaves smooth, ovate- 
acuminate, serrated. External scales of the involucre lanceolate, 
subserrated. 
OTHER SPECIES OF HELIOPSIS. 
H. CANESCENS, Kunth ; H. SCABRA, Dec, Bol. Reg. t. S92. 
Very inferior to the preceding species. This species is a native of Peru, whence it was introduced in 1820. 
H. BUPHTHALMOIDES, Dev.; ANTHEMIS BUPHTHALMOIDES, Jacq. 
A native of Peru, introduced in 1798. This species is more tender than the others, and requires protection 
during winter. 
C 
