Flora of North America species comparison

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Packera ionophylla

Packera macounii

Tehachapi ragwort

long-ray groundsel, Macoun's butterweed, Macoun's groundsel, Puget butterweed, Siskiyou Mountain ragwort, Siskiyou Mountains ragwort
Habit Perennials, 15–30+ cm; taprooted (caudices erect) or rhizomatous (rhizomes branched). Perennials, 30–40+ cm; taprooted (caudices ± branched, becoming rhizomiform).
Stems

usually 1, rarely 2–3, clustered, irregularly arachnoid-tomentose to lanate-tomentose or glabrescent.

1, sparsely to densely tomentose or glabrescent.
Basal leaves

(and proximal cauline, relatively turgid) petiolate;

blades broadly ovate or lyrate (± pinnately lobed, lateral lobes 1–3 pairs, smaller than terminals), 10–30+ × 10–20+ mm, bases tapering to cuneate, ultimate margins subentire or crenate to coarsely dentate (abaxial faces tomentose).

(and proximal) petiolate;

blades lanceolate to oblanceolate, 30–50+ × 10–20 mm, bases tapering, margins entire or shallowly toothed (slightly revolute).
Cauline leaves

gradually reduced (sessile; bractlike, entire).

gradually reduced (distal sessile, bractlike).
Peduncles

bracteate, irregularly tomentose.

inconspicuously bracteate or ebracteate, sparsely tomentose to glabrate.
Ray florets

8–13;

corolla laminae 8–10 mm.

8(–13);

corolla laminae 8–10+ mm.
Disc florets

60–75+;

corolla tubes 2.5–4 mm, limbs 3.5–5 mm.

30–40+;

corolla tubes 2.5–3.5 mm, limbs 2–3 mm.
Phyllaries

(8–)13 or 21, green, 7–10+ mm, densely tomentose proximally, glabrescent distally (tips hair-tufted).

13 or 21, green, 5–7+ mm, glabrous.
Calyculi

inconspicuous.

0 or inconspicuous.
Heads

3–6 in cymiform arrays.

6–15+ in corymbiform arrays.
Cypselae

2–2.5 mm, glabrous;

pappi 5–7 mm.

1.5–2 mm, glabrous;

pappi 4–5 mm.
2n

= 46.

= 46, 92.

Packera ionophylla

Packera macounii
Phenology Flowering early Jun–late Aug. Flowering early May–early Jul.
Habitat Dry, rocky slopes, crevices, granitic outcrops, coniferous woodlands Along streams, roadsides, clearings, disturbed sites, rocky soils, coniferous woodlands
Elevation 1400–3000 m (4600–9800 ft) 400–1400 m (1300–4600 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; OR; WA; BC
[WildflowerSearch map]
[BONAP county map]
Discussion

Of conservation concern.

Packera ionophylla is known only from the San Bernardino, San Gabriel, and Tehachapi mountains and a population on Alamo Mountain in eastern Ventura County.

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

Packera macounii is similar in overall morphology to P. cana. Leaves of P. macounii are narrower and frequently revolute. It is often cited as being collected on serpentine soils; it is not restricted to them. Senecio fastigiatus Nuttall (1840) is a later homonym of S. fastigiatus Schweinitz ex Elliott (1823), a name of uncertain application.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 590. FNA vol. 20, p. 591.
Parent taxa Asteraceae > tribe Senecioneae > Packera Asteraceae > tribe Senecioneae > Packera
Sibling taxa
P. anonyma, P. antennariifolia, P. aurea, P. bernardina, P. bolanderi, P. breweri, P. cana, P. cardamine, P. castoreus, P. clevelandii, P. contermina, P. crocata, P. cymbalaria, P. cynthioides, P. debilis, P. dimorphophylla, P. eurycephala, P. fendleri, P. flettii, P. franciscana, P. ganderi, P. glabella, P. greenei, P. hartiana, P. hesperia, P. hyperborealis, P. indecora, P. layneae, P. macounii, P. malmstenii, P. millefolium, P. millelobata, P. multilobata, P. musiniensis, P. neomexicana, P. obovata, P. ogotorukensis, P. pauciflora, P. paupercula, P. plattensis, P. porteri, P. pseudaurea, P. quercetorum, P. sanguisorboides, P. schweinitziana, P. spellenbergii, P. streptanthifolia, P. subnuda, P. tampicana, P. texensis, P. tomentosa, P. tridenticulata, P. werneriifolia
P. anonyma, P. antennariifolia, P. aurea, P. bernardina, P. bolanderi, P. breweri, P. cana, P. cardamine, P. castoreus, P. clevelandii, P. contermina, P. crocata, P. cymbalaria, P. cynthioides, P. debilis, P. dimorphophylla, P. eurycephala, P. fendleri, P. flettii, P. franciscana, P. ganderi, P. glabella, P. greenei, P. hartiana, P. hesperia, P. hyperborealis, P. indecora, P. ionophylla, P. layneae, P. malmstenii, P. millefolium, P. millelobata, P. multilobata, P. musiniensis, P. neomexicana, P. obovata, P. ogotorukensis, P. pauciflora, P. paupercula, P. plattensis, P. porteri, P. pseudaurea, P. quercetorum, P. sanguisorboides, P. schweinitziana, P. spellenbergii, P. streptanthifolia, P. subnuda, P. tampicana, P. texensis, P. tomentosa, P. tridenticulata, P. werneriifolia
Synonyms Senecio ionophyllus, Senecio ionophyllus var. intrepidus Senecio macounii, Senecio fastigiatus, Senecio fastigiatus subsp. macounii, Senecio leucocrinus, Senecio ligulifolius, Senecio spatuliformis
Name authority (Greene) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981) (Greene) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981)
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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