Difference between revisions of "Hymenopappus scabiosaeus"
Hymenopappus, plate. 1788.
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|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Hymenopappinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Hymenopappinae | ||
Revision as of 19:50, 24 September 2019
Biennials, 40–150 cm. Leaves: basal simple (5–20 mm wide) or 1(–2)-pinnate, 5–25 cm, lobes (3–)5–20+ × (1–)2–8+ mm; cauline 15–50. Heads (20–)40–100 per stem. Peduncles 1–5 cm. Phyllaries white to yellowish, 5–15 × 2–8 mm. Ray florets 0. Disc florets 20–80; corollas whitish, 3–5.5 mm, tubes 2–3 mm, throats funnelform, 1–3 mm, lengths ± 1 times lobes. Cypselae 3–5 mm, ± hirtellous; pappi of 14–18 scales 0.1–1 mm.
Distribution
c, se United States, n Mexico.
Discussion
Varieties 2 (2 in the flora).
Morphologic distinctions between varieties of Hymenopappus scabiosaeus as treated by B. L. Turner (1956) fail for some specimens.
Selected References
None.
Key
| 1 | Peduncles usually subtended by ± membranous bracts 5–14 × 3–10 mm; phyllaries whitish, 7–15 × 4–8 mm | Hymenopappus scabiosaeus var. scabiosaeus |
| 1 | Peduncles not subtended by bracts, or bracts not membranous, 3–5+ × 1–3+ mm; phyllaries whitish to yellowish, 5–9 × 2–4 mm | Hymenopappus scabiosaeus var. corymbosus |