Senecio sheldonensis
Senecio amplectens
Mount Sheldon butterweed, Mount Sheldon ragwort, Mt. Sheldon ragwort
alpine groundsel, showy alpine ragwort
glabrous or with scattered hairs near leaf bases and among heads.
(often purplish-tinged) glabrous or sparsely and unevenly hairy, especially near leaf axils and among heads, usually glabrescent.
single or loosely clustered.
single or loosely clustered.
evenly distributed;
petiolate or subsessile;
blades lanceolate, 4–10 × 2–4 cm, bases ± tapered, margins denticulate (distal leaves sessile, smaller).
usually progressively reduced distally (basal sometimes smaller than proximal or mid leaves);
petiolate (petioles shorter than to equaling blades, often clasping);
blades broadly lanceolate or lanceolate to oblanceolate, (5–)10–20+ × 2–4(–5+) cm, bases tapered, margins dentate to denticulate (distal leaves smaller, bractlike).
± 8;
corolla laminae ± 10 mm.
usually ± 13, sometimes fewer;
corolla laminae (10–)15–25 mm.
± 13, 7–10 mm, tips black (hairy).
± 13 or ± 21, tips often black or brownish (sometimes with scattered black hairs).
of 3–7 bractlets (0.5–3 mm).
of 2–5+ linear to filiform bractlets (lengths to 1/2 phyllaries).
(1–)3–5(–6) in cymiform arrays.
nodding, 1–5(–10).
glabrous.
glabrous.
= 40, ca. 175–180.
Senecio sheldonensis
Senecio amplectens
Senecio sheldonensis is infrequently collected and poorly understood. The treatment here is provisional.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Varieties 2 (2 in the flora).
The varieties of Senecio amplectens are distinguished by morphologic tendencies and habitat preferences; there are many intermediates. Where the ranges of the two overlap, var. amplectens occurs at slightly lower elevations than var. holmii.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Plants (30–)40–60+; herbage sometimes sparsely hairy; leaves mostly proximal and mid cauline; phyllaries frequently black or purplish toward tips, sometimes with black hairs on abaxial faces | var. amplectens |
1. Plants (5–)10–20(–30) cm; herbage glabrous or glabrate at flowering; leaves mostly basal and proximal; phyllaries green or light purplish, glabrous | var. holmii |
BC
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
CalFlora
