Hymenopappus

L’Héritier

Hymenopappus, plate. 1788.

Etymology: Greek hymen, membrane, and pappos, pappus, alluding to membranous pappus scales
Treatment appears in FNA Volume 21. Treatment on page 309. Mentioned on page 395.
 TaxonIllustrator 
FNA21 P49 Hymenopappus newberry.jpegHymenopappus newberryi
Hymenopappus filifolius var. cinereus
Perityle cernua
Marjorie C. Leggitt
Marjorie C. Leggitt
Bee F. Gunn

Biennials or perennials, to 120 cm. Stems erect, often scapiform (1 stem per crown in biennials, usually 3+ in perennials). Leaves mostly basal or basal and cauline; alternate; petiolate; blades usually 1–2+ times pinnately lobed (lobes usually ± filiform), ultimate margins usually entire, rarely toothed, faces glabrous or hairy, often tomentose, usually glanddotted as well. Heads radiate or discoid, in ± corymbiform arrays. Involucres obconic to hemispheric, 4–15+ mm diam. Phyllaries 5–13+ in 2–3+ series, subequal, usually membranous or scarious-margined (often yellowish, whitish, or purplish). Receptacles flat or convex, epaleate (except H. newberryi). Ray-florets 0 or 8, pistillate, fertile; corollas white to ochroleucous. Disc-florets 12–70+, bisexual, fertile; corollas usually yellow to ochroleucous or whitish to purplish, tubes longer than or about equaling funnelform or abruptly dilated, campanulate throats, lobes 5 (reflexed at anthesis). Cypselae obpyramidal (4-angled, sometimes 5-angled, each face usually 1–4-ribbed, glabrous or hirtellous to villous); pappi 0 or of 12–22 orbiculate to spatulate scales. x = 17.

Distribution

North America, Mexico

Discussion

Species 11 (10 in the flora).

My treatment of Hymenopappus is essentially an adaptation of that by B. L. Turner (1956).

Key

1 Perennials (usually 3+ aerial stems from crown); cauline leaves mostly 0–12; heads 1–20(–50) per stem; disc corolla throat lengths 2–8 times lobes > 2
1 Biennials (usually 1 stem from crown); cauline leaves (2–)10–100; heads (15–)20–200 per stem; disc corolla throat lengths 1–2(–3) times lobes > 5
2 Ray florets 8 > 3
2 Ray florets 0 > 4
3 Basal leaves 12–25 cm; peduncles 6–15 cm; pappi 0, or 0.01–0.1 mm (receptacles paleate) Hymenopappus newberryi
3 Basal leaves 8–14 cm; peduncles 3–8 cm; pappi 0.4–0.6 mm Hymenopappus radiatus
4 Leaf blades simple or 1-pinnate; cypselae glabrous or sparsely hirtellous Hymenopappus mexicanus
4 Leaf blades 2-pinnate; cypselae hirtellous to villous Hymenopappus filifolius
5 Ray florets 8 Hymenopappus biennis
5 Ray florets 0 > 6
6 Basal leaves simple or 1–2-pinnate, lobes (1–)5–30 mm wide; disc corollas whitish or purplish (not yellowish), tubes 2–3 mm > 7
6 Basal leaves 2-pinnate, lobes 0.5–6 mm wide; disc corollas whitish or yellowish, tubes 1.5–2.2 mm > 8
7 Basal leaves simple or 1-pinnate; disc corollas usually purplish, rarely whitish; pappi 0.3–2 mm Hymenopappus artemisiifolius
7 Basal leaves 1–2-pinnate; disc corollas whitish; pappi 0.1–1 mm Hymenopappus scabiosaeus
8 Lobes of basal leaves 1–6 mm wide; disc corollas yellowish; pappi 0.5–1.5 mm Hymenopappus flavescens
8 Lobes of basal leaves 0.5–1.5 mm wide; disc corollas whitish; pappi 1–1.5(–2) mm > 9
9 Disc corollas 3–4 mm, throats ± funnelform Hymenopappus carrizoanus
9 Disc corollas 2.5–3 mm, throats ± campanulate Hymenopappus tenuifolius
... more about "Hymenopappus"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
John L. Strother +
L’Héritier +
decurrent +
compound +  and simple +
toothed +
1-2+ times pinnately lobed ultimate margins usually entire +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
usually yellow +  and ochroleucous or whitish +
hairy +  and glabrous +
obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
North America +  and Mexico +
Greek hymen, membrane, and pappos, pappus, alluding to membranous pappus scales +
tomentose +, hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
discoid +  and radiate +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
obconic;hemispheric +
cauline +  and basal +
deltate +  and filiform +
dentate to pinnatifid or palmatifid +  and entire +
2-carpellate +
persistent +
of 12 +  and 22 orbiculate to spatulate scales +
scarious-margined +
5 +  and 13 +
Hymenopappus, plate. +
bearing subulate enations +, hairy +  and bristly +
convex;flat +
turner1956a +
12 +  and 22 +
orbiculate +  and spatulate +
exalbuminous +
scapiform +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Compositae +
Hymenopappus +
Asteraceae (tribe Heliantheae) subtribe Hymenopappinae +
campanulate +  and dilated +
toothed +  and entire +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
perennial +  and biennial +
0 cm0 mm <br />0 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
tree +, shrub +  and subshrub +