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heath groundsel, wood groundsel, woodland groundsel, woodland ragwort

Texas ragwort

Habit Annuals, (15–)30–80+ cm (taproots fibrous-rooted). Annuals, (10–)20–80 cm (roots relatively thin, branching).
Herbage

puberulent (hairs abundant, curly).

loosely arachno-tomentose, unevenly glabrate or glabrescent.

Stems

single.

single.

Leaves

evenly distributed; petiolate;

blades obovate to oblong, 3–7(–12) × 1–3(–4) cm, usually 1–2-pinnate, bases tapered, ultimate margins dentate (distal leaves similar, clasping, bractlike).

progressively reduced distally; petiolate (petioles broadly winged);

blades ovate-lanceolate, 3–8(–10) × (1–)1.5–3(–4) cm, bases tapered or ± truncate, margins dentate to subentire (mid leaves subsessile, lanceolate; distal subulate, bractlike).

Ray florets

0 or 1–8+;

corolla laminae usually 1–2+ mm (barely surpassing phyllaries).

± 8;

corolla laminae 8–15 mm.

Phyllaries

± 13 (± 21), 4–7+ mm, tips greenish or minutely black.

± 13, (6–)7–10 mm, tips green to grayish.

Calyculi

0 or of 1–5+ linear to filiform bractlets.

of 2–8 bractlets (1–2+ mm).

Heads

12–24 in corymbiform arrays.

(1–)10–30 in corymbiform arrays.

Cypselae

hairy (especially on angles).

hirtellous.

2n

= 40.

Senecio sylvaticus

Senecio ampullaceus

Phenology Flowering late spring–summer (northern areas of cool, climate); winter (southern areas). Flowering early–mid spring.
Habitat Mildly disturbed woodlands, open, sandy sites Open sandy or disturbed sites
Elevation 100–300 m (300–1000 ft) 100–800 m (300–2600 ft)
Distribution
from FNA
CA; LA; MA; MI; NJ; OH; OR; PA; WA; WI; BC; NB; NF; NS; PE; QC; Eurasia [Introduced in North America]
[WildflowerSearch map]
[BONAP county map]
from FNA
TX
[WildflowerSearch map]
[BONAP county map]
Discussion

Senecio sylvaticus is a Eurasian weed that favors cool, wet climates. It is well established in coastal areas of the Pacific Coast and in parts of Newfoundland and Quebec; elsewhere in the flora, it appears to be sporadic.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Senecio ampullaceus has been reported for Arkansas and Missouri (St. Louis). It is similar to S. quaylei.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 20, p. 563. FNA vol. 20, p. 561.
Parent taxa Asteraceae > tribe Senecioneae > Senecio Asteraceae > tribe Senecioneae > Senecio
Sibling taxa
S. actinella, S. amplectens, S. ampullaceus, S. aphanactis, S. arizonicus, S. aronicoides, S. astephanus, S. atratus, S. bigelovii, S. blochmaniae, S. californicus, S. cannabifolius, S. clarkianus, S. crassulus, S. elegans, S. elmeri, S. eremophilus, S. ertterae, S. erucifolius, S. flaccidus, S. fremontii, S. hydrophiloides, S. hydrophilus, S. integerrimus, S. jacobaea, S. lemmonii, S. lugens, S. lyonii, S. megacephalus, S. mohavensis, S. multidentatus, S. neowebsteri, S. parryi, S. pattersonensis, S. pseudoarnica, S. pudicus, S. quaylei, S. rapifolius, S. riddellii, S. sacramentanus, S. scorzonella, S. serra, S. sheldonensis, S. soldanella, S. spartioides, S. sphaerocephalus, S. spribillei, S. squalidus, S. taraxacoides, S. triangularis, S. viscosus, S. vulgaris, S. warnockii, S. wootonii
S. actinella, S. amplectens, S. aphanactis, S. arizonicus, S. aronicoides, S. astephanus, S. atratus, S. bigelovii, S. blochmaniae, S. californicus, S. cannabifolius, S. clarkianus, S. crassulus, S. elegans, S. elmeri, S. eremophilus, S. ertterae, S. erucifolius, S. flaccidus, S. fremontii, S. hydrophiloides, S. hydrophilus, S. integerrimus, S. jacobaea, S. lemmonii, S. lugens, S. lyonii, S. megacephalus, S. mohavensis, S. multidentatus, S. neowebsteri, S. parryi, S. pattersonensis, S. pseudoarnica, S. pudicus, S. quaylei, S. rapifolius, S. riddellii, S. sacramentanus, S. scorzonella, S. serra, S. sheldonensis, S. soldanella, S. spartioides, S. sphaerocephalus, S. spribillei, S. squalidus, S. sylvaticus, S. taraxacoides, S. triangularis, S. viscosus, S. vulgaris, S. warnockii, S. wootonii
Synonyms S. ampullaceus var. floccosus, S. ampullaceus var. glaberrimus
Name authority Linnaeus: Sp. Pl. 2: 868. (1753) Hooker: Bot. Mag. 63: plate 3478. (1836)
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