EcoFlora - Inula

Inula
Family: Asteraceae Scott Namestnik	FNA Gleason & Cronquist Resources Neil A. Harriman in Flora of North America (vol. 19, 20 and 21) Perennials [annuals], 20-200 cm. Leaves basal (usually withering before flowering) and cauline; petiolate (proximal) or sessile (distal); blade margins usually serrate to dentate, sometimes entire. Heads radiate [disciform, discoid], borne singly or in open, corymbiform arrays. Involucres hemispheric or campanulate, [5-]10-40 mm diam. Phyllaries persistent, in 4-7+ series. Receptacles flat or convex, smooth or alveolate, epaleate. Ray florets (15-)50-150+, pistillate, fertile; corollas yellow [orange], laminae 10-30+ mm. Disc florets mostly (50-)100-250+; corollas yellow, lobes 5. Cypselae ± columnar (subterete) or prismatic (± 4-5-ribbed or -angled); pappi persistent, of basally connate, barbellate bristles or setiform scales in 1 series. x = 8, 9, 10. The three species in the flora are probably escapes from cultivation. Formerly, Inula was circumscribed more broadly. Vascular plants of NE US and adjacent Canada Heads radiate, yellow, the rays pistillate; invol hemispheric or campanulate, its bracts imbricate in several series, the inner commonly narrow and scarious, the outer more herbaceous and often broader; receptacle flat or convex, naked; disk-fls tubular and perfect; anthers sagittate-tailed; style-branches flattened, externally slightly papillate distally, with well developed ventromarginal stigmatic lines extending all the way around the rounded tip; achenes subterete or ±prominently 4-5 ribbed or angled; pappus a single series of few to numerous capillary bristles, sometimes connate at base; ±hairy or glandular herbs with alternate or basal, simple lvs. 200, Old World. 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.
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