Helianthus maximiliani
Helianthus eggertii
hélianthe de maximilien, Maximilian sunflower, Maximilian's sunflower
Eggert's sunflower
erect, 5–30 dm, scabrous to scabro-hispidulous.
erect, glabrous (distinctively bluish, glacous).
cauline; mostly alternate;
petioles 0–2 cm;
blades (light green to gray-green, 1-nerved, conduplicate) lanceolate, 10–30 × 2–5.5 cm, bases cuneate, margins usually entire, sometimes serrulate, abaxial faces scabrous to scabro-hispid, gland-dotted.
cauline; all or mostly opposite;
sessile;
blades (1-nerved) lanceolate to lance-ovate, 7–16.5 × 1.5–3.5 cm, bases cuneate, margins entire or serrulate, faces glabrous (abaxial) or strumose (adaxial), gland-dotted.
1–11 cm.
1–4 cm.
hemispheric, 13–28 mm diam.
hemispheric, 10–25 mm diam.
10–25;
laminae (15–)25–40 mm.
10–18;
laminae 15–20 mm.
75+;
corollas 5–7 mm, lobes yellow;
anthers dark brown or black;
appendages usually yellow, sometimes partly dark.
70+;
corollas 5–7 mm, lobes yellow;
anthers dark, appendages dark or ± yellowish.
30–40, lanceolate, 14–20 × 2–3 mm, (margins ciliate) apices acute to attenuate, abaxial faces canescent, gland-dotted.
30–38, lanceolate, 12–16 × 3.5–4.5 mm, (margins ciliate) apices acuminate, abaxial faces glabrate, not gland-dotted.
(1–)3–15 (often in racemiform to spiciform arrays).
1–5.
3–4 mm, glabrate;
pappi of 2 aristate scales 3–4.1 mm.
4–6 mm, glabrous;
pappi of 2 aristate scales 3–4 mm plus 0–1 deltate scales 0.5–1 mm.
7–11 mm, entire or 3-toothed (apices greenish, mucronate, hairy).
9–11 mm, entire or ± 3-toothed (apices deltate).
= 34.
= 102.
Helianthus maximiliani
Helianthus eggertii
Helianthus maximiliani is introduced in eastern Ontario and in Quebec. It appears to be native to midcontinental prairie regions and has spread along railroads and highways into all areas of North America. Its wide dispersal may be aided by cultivation for its attractive, showy floral displays. In addition to the usually conduplicate, single-nerved leaves and spikelike arrangement of the heads, it is distinguished by the whitish-canescent indument of the leaves and stems and the long-attenuate phyllaries.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Helianthus eggertii is similar to H. strumosus and H. laevigatus; it is distinguished by the distinctive blue coloration of stems and leaves and by the leaves usually 1-nerved, in contrast to the 3-nerved condition typical for the genus. It is listed federally as an endangered species; R. L. Jones (1994) found it to be more common than was previously thought, and it is now in the process of being removed from the federal list.
of conservation concern
(Discussion copyrighted by Flora of North America; reprinted with permission.)
- Local floras:
BC - Local Web sites:
CalFlora, CalPhotos, 
Flora NW, 
Go Botany, 
IL Wildflowers, 
KS Wildflowers, 
MD Biodiversity, 
MI Flora, 
MN Wildflowers, 
MO Plants, 
PNW Herbaria 
WildflowerSearch
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USDA Plants Database- LBJ Wildflower Center
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