Lasianthaea
Family:
Asteraceae
Sue Carnahan
FNA
Resources
John L. Strother in Flora of North America (vol. 21)
Perennials
[shrubs], 10-60+ [-700] cm (rootstocks bearing tubers).
Stems
erect, branched ± throughout.
Leaves
cauline; opposite; petiolate; blades (usually 3-nerved) rounded-deltate to ovate or lance-ovate [lanceolate], bases cuneate to rounded or truncate, margins serrate, faces ± scabrous.
Heads
radiate, borne singly [in corymbiform arrays].
Involucres
hemispheric [obconic], [4-]10-14[-25+] mm diam.
Phyllaries
persistent, 12-20 in 2-5 series (ovate to lanceolate, subequal or outer shorter [longer], herbaceous to papery).
Receptacles
convex, paleate (paleae membranous to indurate, conduplicate, apices acute [erose]).
Ray florets
[4-]11-14[30], pistillate, fertile; corollas yellow to orange [purplish].
Disc florets
20-100+[-200+], bisexual, fertile; corollas yellow to orange [purplish], tubes about equaling ampliate, cylindric throats, lobes 5, deltate.
Cypselae
3-angled (ray) or strongly compressed or flattened (all with sharp edges, not truly winged);
pappi
persistent, of 2(-3) subulate scales or awns (continuous with margins of cypselae) plus 0-4 shorter scales.
x
= 10, 11-
Species within inventory project:
Intermountain Regional Herbarium Network
Lasianthaea aurea
Lasianthaea calva
Images
not available
Lasianthaea ceanothifolia
Lasianthaea crocea
Lasianthaea fruticosa
Lasianthaea gentryi
Lasianthaea guatemalensis
Images
not available
Lasianthaea helianthoides
Lasianthaea jaliscensis
Lasianthaea machucana
Images
not available
Lasianthaea macrocephala
Lasianthaea palmeri
Lasianthaea podocephala
Lasianthaea ritovegana
Lasianthaea rosei
Lasianthaea seemannii
Lasianthaea squarrosa
Lasianthaea zinnioides