Polymnia canadensis |
Polymnia |
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rayless leafcup, white-flower leaf-cup |
leafcup |
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Habit | Perennials. | Annuals or perennials, 50–150+ cm (often rhizomatous). | ||||||||
Stems | pilosulous to villous and/or stipitate-glandular. |
erect, branched distally. |
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Leaves | petioles 3–8(–12+) cm, sometimes raggedly winged; blades 4–20(–40+) × 2–12(–25+) cm, larger usually deeply pinnately lobed, lobes 5–7. |
all or mostly cauline; opposite; petiolate (petioles often ± winged, often with connate-perfoliate basal appendages); blades (pinnately nerved) deltate or rounded-rhombic to cordate or ovate, often raggedly pinnately lobed (lobes 3–11), ultimate margins coarsely toothed to denticulate or entire, faces pilose or pilosulous to hirtellous, or glabrate, or glabrous, gland-dotted and/or stipitate-glandular. |
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Involucres | hemispheric, 4–15+ mm diam. |
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Receptacles | flat to convex, paleate (paleae obovate to oblanceolate or spatulate, herbaceous to scarious). |
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Ray florets | 2–6, pistillate, fertile; corollas pale yellowish to whitish (tubes pilosulous, laminae ± cuneate to linear, 3-lobed, sometimes absent or nearly so). |
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Disc florets | 12–30+, functionally staminate; corollas pale yellow, tubes shorter than abruptly dilated throats, lobes 5, deltate to lance-ovate. |
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Phyllaries | persistent, 6–21+ in 2 series (distinct, outer 2–6 ovate to linear, ± herbaceous, inner ovate to lanceolate, subequal to or shorter than outer, more scarious, similar to paleae). |
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Calyculi | 0. |
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Heads | usually radiate, rarely ± disciform, (2–5+) in loose to congested, corymbiform clusters. |
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Cypselae | 3–4 mm, 3-angled or -ribbed. |
plumply pyriform, ± obcompressed, 3–6-angled or -ribbed, finely striate between ribs (narrowed at bases, patently inserted on receptacles, often minutely beaked), sparsely hirtellous or glabrate; pappi 0. |
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x | = 15. |
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2n | = 30. |
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Polymnia canadensis |
Polymnia |
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Phenology | Flowering May–Aug(–Oct). | |||||||||
Habitat | Damp, shaded sites, calcareous soils | |||||||||
Elevation | 100–1000 m (300–3300 ft) | |||||||||
Distribution |
AL; AR; CT; DC; GA; IA; IL; IN; KS; KY; MI; MN; MO; NC; NY; OH; OK; PA; TN; VA; VT; WI; WV; ON
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e North America; c North America |
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Discussion | Species 3 (3 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 21, p. 39. | FNA vol. 21, p. 39. | ||||||||
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Polymniinae > Polymnia | Asteraceae > tribe Heliantheae > subtribe Polymniinae | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Name authority | Linnaeus: Sp. Pl. 2: 926. (1753) | Kalm: in C. Linnaeus, Sp. Pl. 2: 926. (1753): Gen. Pl. ed. 5, 396. (1754) | ||||||||
Web links |