WorldFloraDB - Senecio integerrimus

Characteristics

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.

More

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) × 1–5 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.

Life form

perennial

Growth form

herb

Growth support

free-standing

Foliage retention

Sexuality

-

Pollination

-

Spread

-

Mature width (meter)

-

Mature height (meter)

0.3

Root system

fibrous-root

Rooting depth (meter)

0.4

Root diameter (meter)

-

Flower color

Blooming months

Jan	Feb	Mar
Apr	May	Jun
Jul	Aug	Sep
Oct	Nov	Dec

Fruit color

-

Fruiting months

-

Nitrogen fixer

-

Photosynthetic pathway

c3

Environment

Light
Soil humidity
Soil texture	-
Soil acidity
Soil nutriment	-
Hardiness (USDA)

Usage

Uses	medicinal poison
Edible	-
Therapeutic use	-
Human toxicity	-
Animal toxicity	-

Cultivation

Can be grown by seedlings.

Mode	seedlings
Germination duration (days)	10 - 21
Germination temperacture (C°)	18 - 23
Germination luminosity	light
Germination treatment	-
Minimum temperature (C°)	-
Optimum temperature (C°)	-
Size	-
Vigor	-
Productivity	-