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Senecio integerrimus Nutt.  

No occurrences found

Family: Asteraceae
lambstongue ragwort
Senecio integerrimus image
Patrick Alexander
  • FNA
  • Gleason & Cronquist
  • Resources
Theodore M. Barkley+ in Flora of North America (vol. 20)
Perennials (possibly biennials), (10-)20-70 cm (cau­dices button­like, roots fleshy-fibrous). Herbage arachnose, loosely tomentose, or villous (hairs crisped, jointed), glabrescent. Stems single. Leaves progressively reduced distally; ± petiolate; blades elliptic, lanceolate, linear, oblanceolate, rounded-deltate, or suborbiculate, 6-25 × 1-6 cm, bases ± tapered or truncate to cordate, margins entire or ± dentate (distal leaves sessile, bractlike). Heads 6-20(-40+) in corymbiform arrays (peduncle of terminal head often shorter than others). Calyculi of 1-5+ linear to filiform bractlets (seldom more than 2 mm). Phyllaries usually ± 13 or ± 21, rarely ± 8, (4-)5-12(-15) mm, tips usually black, sometimes green. Ray florets usually ± 8 or ± 13, sometimes 0; corolla laminae 6-15(-20) mm (usually yellow, ochroleucous to white in one variety). Cypselae usually glabrous, sometimes hirtellous (mostly on angles). 2n = 40, 80. The varieties of Senecio integerrimus are distinguished by morphology and geography.

Vascular plants of NE US and adjacent Canada
Stout, single-stemmed, fibrous-rooted perennial 2.5-7 dm from a very short, erect caudex or crown, villous or hirsute with crisp loose hairs when young, commonly nearly glabrous by flowering time; lvs entire, denticulate, or sometimes irregularly dentate, the basal mostly oblanceolate or elliptic and short-petiolate, 8-25 cm (petiole included) נ1-5 cm; cauline lvs progressively reduced, becoming sessile; heads 5-25 in a rather congested infl, the terminal peduncle often shorter and thicker than the others; disk 8-17 mm wide; invol 5-10 mm, its bracts often minutely and irregularly black-tipped; rays 6-10 mm; achenes glabrous; 2n=40. Prairies and other open places; Sask., Minn., and Io., w. to B.C. and Calif. Apr.-June. Our plants are var. integerrimus.

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.
Senecio integerrimus image
Patrick Alexander
Senecio integerrimus image
Patrick Alexander
Senecio integerrimus image
Patrick Alexander
Senecio integerrimus image
Patrick Alexander
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