43.
Senecio eremophilus
Richardson in J. Franklin et al., Narr. Journey Polar Sea. 759. 1823.
Perennials,
(20—)40—80(—140) cm (caudices branched, fibrous-rooted).
Herbage
glabrous or glabrate.
Stems
single or loosely clustered.
Leaves
± evenly distributed (proximal often withering before flowering); petiolate or sessile; blades ovate or lanceolate to narrowly lanceolate, (3—)6—12(—20) × (1—)1.5—5(—7) cm, bases tapered, margins usually pinnate to lacerate, sometimes dentate.
Heads
10—60+ in compound corymbiform arrays.
Calyculi
of 3—5+ (prominent or inconspicuous) bractlets (lengths to
3
/ 4 phyllaries).
Phyllaries
(± 8) ± 13, 3—8+ mm, tips green or black.
Ray florets
± 8; corolla laminae 5—10 mm.
Cypselae
usually glabrous, sometimes hirtellous.
2
n
= 38, 40, 44.
Varieties 3 (3 in the flora): mostly n, w North America.
Varieties of
Senecio eremophilus
are distinguished by head size and distribution. Varieties
eremophilus
and
macdougalii
are notably different; var.
kingii
is intermediate in both morphology and distribution.
