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New Mexico groundsel

Photo is of parent taxon

Toumey's groundsel

Habit Perennials, biennials, or annuals, 20–50+ cm; fibrous-rooted, taprooted, or ± rhizomatous (bases branched, horizontal or ascending to erect). Perennials, densely lanate or woolly, rhizomatous (rhizomes creeping) or fibrous-rooted (caudices suberect).
Stems

1 or 2–5+, clustered, lanate- or arachno-tomentose or glabrescent.

1 (scapiform).

Basal leaves

(often abaxially cyanic) petiolate (petioles hairy to glabrate);

blades ovate to lanceolate or narrowly lanceolate, 20–60+ × 10–30+ mm, bases abruptly contracted to tapering, margins subentire or denticulate to subserrate (abaxial faces usually tomentose, adaxials frequently glabrate).

blades ovate to obovate, margins irregularly dentate.

Cauline leaves

gradually or abruptly reduced (proximal petiolate, similar to basals; mids and distals sessile, lanceolate, entire).

inconspicuous (abruptly reduced, bractlike).

Peduncles

conspicuously bracteate, usually hairy.

Ray florets

(5–)8 or 13;

corolla laminae 4–10 mm.

Disc florets

40–60+;

corolla tubes 1.5–2.5 mm, limbs 3.5–4.5 mm.

Phyllaries

13 or 21, green or yellowish, 4–7+ mm, tomentose to glabrescent.

Calyculi

conspicuous.

Heads

3–20+ in open or compact, corymbiform to subumbelliform arrays (subtended by smaller arrays arising from leaf axils).

Cypselae

1.5–2.5 mm, usually hirtellous on ribs, sometimes glabrous;

pappi 5–6+ mm.

2n

= 44, 46, 92.

= 44, 46.

Packera neomexicana

Packera neomexicana var. toumeyi

Phenology Flowering mid Apr–early Jul.
Habitat Well-drained, rocky soils in coniferous woodlands
Elevation 1800–2500 m (5900–8200 ft)
Distribution
from FNA
AZ; CO; NM; UT; w Mexico
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; NM
[BONAP county map]
Discussion

Varieties 3 (3 in the flora).

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

Of conservation concern.

Variety toumeyi is known only from the Pinal, Chiricahua, and Santa Catalina mountains of Arizona and the Animas and Black mountains of New Mexico. Although range and habitat of var. toumeyi overlap with those of var. neomexicana, the two are readily distinguished. Adaxial leaf faces of var. toumeyi are glabrate and the plants are scapiform.

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

Key
1. Plants loosely tomentose or glabrate; basal leaves: blades narrowly lanceolate, margins subentire or irregularly dentate
var. mutabilis
1. Plants usually densely lanate or woolly tomentose, seldom glabrate; basal leaves: blades ovate or broadly lanceolate, margins dentate to deeply dentate or dissected
→ 2
2. Plants taprooted; cauline leaves conspicuous
var. neomexicana
2. Plants rhizomatous or fibrous-rooted; cauline leaves inconspicuous (bractlike)
var. toumeyi
Source FNA vol. 20, p. 593. FNA vol. 20, p. 594.
Parent taxa Asteraceae > tribe Senecioneae > Packera Asteraceae > tribe Senecioneae > Packera > Packera neomexicana
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. ionophylla, P. layneae, P. macounii, P. malmstenii, P. millefolium, P. millelobata, P. multilobata, P. musiniensis, 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. neomexicana var. mutabilis, P. neomexicana var. neomexicana
Subordinate taxa
P. neomexicana var. mutabilis, P. neomexicana var. neomexicana, P. neomexicana var. toumeyi
Synonyms Senecio neomexicanus Senecio toumeyi, Senecio blumeri, Senecio neomexicanus var. toumeyi
Name authority (A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981) (Greene) Trock & T. M. Barkley: Sida 18: 386. (1998)
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