H E L IÂ N T H U S petiolaris.
Long-petioled Sunflower.
C la ssé Order. S Y N G E N E S IA P O L Y G A M IA F R U S T R A N E A .
Natural Order. COM PO SITÆ . t, i l l
Subordo X . HELIANTHEÆ. Cassmi m journ. de phys. tom.76. p . l l l .
H E L IA N T H U S . JnuotecrMm polyphyllum, imbncatum. R e ^ ta c u -
lum planum paleaceum. Flosculi hermaphrodUu^^^^^^^^^^
lati, neutri. Akenia c o m p r e s s a , coronata squamis (sæpiùs duabus) am t*
formibus, d e c id u is.-H e rbæ sæpius alUssimæ. rarius frútices. . J » '* “ W » -
s i í a aut alterna, integra, soe p is s i^ nervata
Flores terminales, sæpius corymbosi, radio luteo. Kth. synops. 2. p. 7 .
H. petiolarù, a n n u u sT ^ s alternis ovatis acutis
petiolatis scabris, caule erecto ramoso, P e d ^ ^ ^
minibus villosis. Nuttall in jo um . o f the Academy o f Natural Sciences
o f Philadelphia. 1821, v .2 . p a rt.X . p. 115.
Helianthus petiolaris. Swt, hort, brit, ed it, 2. p , 309.
Annual, Leaves
mostly alternate, ovate, or ovately lanceolate, and somewhat
undulate, very rough, 3-nerved, somewhat glossy, sorne of
the larger leaves somewhat serrated, but the greater part entire,
or nearly destitute of serratures. Petioles voxy long,
rough and hairy. Peduneles also very long, solitary. Invo-
luerum of numerous scales or leaflets, that ^ n -
ceolate, acute. Reeeptaele chalfy, the chalf mostly 3-toothed^
Rays large and spreading, of a golden yellow, producing a
barren style, and 2-cleft spreadmg s h g x n a . Floret of the ásk
tubular, 5-toothed. Stamens 5 -. filaments
united into a tube. Akenia or Seed clothed with a short silky
brown pubescence, spotted, terminated by 2 aristas, surmounted
by the style, and villous stigma.
This handsome and very distinct species of annual
Sunflower, is a native of the sandy shores of the Arkansa
flowering in August, according to Nuttall,
discoverer, and who published itin the Journal of the ^f^deiny
of Natural Sciences, of Philadelphia m the
seeds were sent by him to the collection of the late Robert
Barclay, Esq., at Bury-hill, in 1826, mwhose collection it has
flowered every year since. Mr Cameron
also received seeds of it from Germany, ®®d®kth® "^me of
H. asper, of Roth; but we see
in any work that we have examined,
course must be the original one, as he was its first discoverer.
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