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Naturalized flora of The Morton Arboretum
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Hasteola
Family:
Asteraceae
Scott Namestnik
FNA
Resources
Loran C. Anderson in Flora of North America (vol. 20)
Perennials,
(50-)60-240 cm.
Stems
usually 1, erect (unbranched proximal to heads).
Leaves
basal and cauline; alternate; petiolate (proximal) or sessile; blades pinnately nerved, broadly deltate or hastate (proximal) to broadly lanceolate, margins doubly-serrate, faces glabrous.
Heads
discoid, in corymbiform (± flat-topped) arrays.
Calyculi
of 4-9+ (subulate, rarely leaflike) bractlets.
Involucres
cylindric or campanulate to obconic, 5-8+ mm diam. (glabrous).
Phyllaries
persistent, 7-14+ in 1-2 series, erect, distinct, oblong, ± equal, margins chartaceous to scarious.
Receptacles
slightly convex or flat, foveolate, epaleate.
Ray florets
0.
Disc florets
10-55, bisexual, fertile; corollas usually white or ochroleucous to greenish, rarely pinkish, tubes longer than cylindric throats, lobes 5, erect to spreading, lanceolate; style branches stigmatic in 2 lines, apices truncate or truncate-penicillate (appendages essentially 0).
Cypselae
cylindric-fusiform, 8-12-ribbed, glabrous;
pappi
persistent (fragile), of 100-150+, white, barbellulate bristles.
x
= 20.
Asian species that have been assigned to
Hasteola
belong to
Parasenecio
.
Species within inventory project:
Chicago Region Checklists and Inventories
Hasteola suaveolens
Map not
Available