EcoFlora - Hymenopappus

Hymenopappus
Family: Asteraceae Max Licher	FNA Gleason & Cronquist Resources John L. Strother in Flora of North America (vol. 21) 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 gland-dotted 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-, 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. My treatment of Hymenopappus is essentially an adaptation of that by B. L. Turner (1956). Vascular plants of NE US and adjacent Canada Heads mostly discoid; invol bracts appressed, in 2-3 equal series, at least the inner with broad, obtuse, scarious, somewhat petaloid, yellowish or whitish tip, ±herbaceous below; receptacle small, naked; disk-fls perfect, the cor yellow or whitish, with campanulate 4-5-lobed throat, the lobes mostly ovate; style-branches flattened, with very short, minutely hairy appendage; achenes ca 15-20-nerved and 4-5-angled; pappus of 12-20 membranous or hyaline small scales, or rarely wanting; herbs with alternate, pinnatifid lvs and several or many small or middle-sized, hemispheric or campanulate heads. 10, N. Amer. Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp. ©The New York Botanical Garden. All rights reserved. Used by permission.
Species within checklist: Indiana Rare Species Hymenopappus artemisiaefolius Map not Available Hymenopappus artemisiifolius Map not Available Hymenopappus biennis Map not Available Hymenopappus carolinensis Map not Available Hymenopappus carrizoanus Map not Available Hymenopappus columbianus Map not Available Hymenopappus corymbosus Map not Available Hymenopappus filifolius Map not Available Hymenopappus flavescens Map not Available Hymenopappus flavomarginatus Map not Available Hymenopappus glandulosus Map not Available Hymenopappus hintoniorum $Image of Hymenopappus hintoniorum$ Map not Available Hymenopappus integer Map not Available Hymenopappus macroglottis Map not Available Hymenopappus mexicanus Map not Available Hymenopappus nanus Map not Available Hymenopappus newberryi Map not Available Hymenopappus niveus Map not Available Hymenopappus nudatus Map not Available Hymenopappus obtusifolius Map not Available Hymenopappus ochroleucus Map not Available Hymenopappus parvulus Map not Available Hymenopappus petaloideus Map not Available Hymenopappus polycephalus Map not Available Hymenopappus radiata Map not Available Hymenopappus radiatus Map not Available Hymenopappus scabiosaeus Map not Available Hymenopappus scaposus Map not Available Hymenopappus sulphureus Map not Available Hymenopappus tenuifolius Map not Available Hymenopappus tomentosus Map not Available