Flora of North America species comparison

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Senecio warnockii

Senecio ertterae

Warnock's ragwort

ertter's groundsel, ertter's ragwort
Habit Subshrubs, 20–40 cm (taproots forming woody crowns). Annuals, 20–50(–60+) cm (taproots relatively thin, twisted).
Herbage

closely, unevenly lanate-floccose, glabrescent.

(± turgid or subsucculent) unevenly villous-tomentose, glabrescent.
Stems

usually multiple (strict or nearly so, arching-erect).

usually single, rarely clustered.
Leaves

(often recurved and thickish-turgid) concentrated distally on stems;

sessile or obscurely petiolate;

blades narrowly linear to filiform (2–7 cm × 1 mm), bases ± linear, margins entire.

progressively reduced distally (basal usually withering before flowering);

petiolate (petioles winged);

blades oblanceolate to spatulate, 4–7 × 1.5–3 cm, bases tapered, margins incised (distal leaves sessile, bractlike).
Ray florets

usually ± 8, rarely 0;

corolla laminae 5–10 mm.

± 8 (± 13?);

corolla laminae 5–6 mm.
Phyllaries

± 13, 5–8 mm, tips green or minutely black.

± 13, 6–7 mm, tips green.
Calyculi

0 or of 3–5 bractlets (lengths less than 1/2 phyllaries).

of 1–5+ linear to subulate bractlets (to 4 mm).
Heads

3–10 in corymbiform arrays (involucres weakly campanulate).

6–10(–20) in cymiform arrays.
Cypselae

glabrous.

usually hairy (especially on angles), sometimes glabrous.
2n

= 40.

Senecio warnockii

Senecio ertterae
Phenology Flowering fall (perhaps spring–summer). Flowering late summer–early fall.
Habitat Open sites, gypseous soils Talus slopes of greenish yellow ash tuff
Elevation 800–1500 m (2600–4900 ft) 900–1200 m (3000–3900 ft)
Distribution
from FNA
NM; TX
[BONAP county map]
from FNA
OR
[BONAP county map]
Discussion

Of conservation concern.

Senecio warnockii is infrequently collected; additional study may show it to be an edaphic phase of S. flaccidus. The restriction to gypseous soils and the gross aspect combine to make it distinctive.

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

Of conservation concern.

Senecio erterrae is in the Center for Plant Conservation’s National Collection of Endangered Plants.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 559. 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. sylvaticus, S. taraxacoides, S. triangularis, S. viscosus, S. vulgaris, S. wootonii
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. 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
Name authority Shinners: Sida 1: 379. (1964) T. M. Barkley: in N. L. Britton et al., N. Amer. Fl., ser. 2, 10: 124. (1978)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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