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Rothrock's crownbeard

long-leaf crownbeard

Habit Plants 30–60+ cm (perennating bases ± erect, internodes not winged). Plants 60–150+ cm (perennating bases ± erect, internodes not winged).
Leaves

all or mostly opposite (distal sometimes alternate);

blades ovate-deltate or rhombic to lance-elliptic, 3–5 × 1–3 cm, bases subtruncate to cuneate, margins coarsely toothed to subentire, apices obtuse to acute, faces ± hirtellous to scabrellous.

all or mostly opposite (distal sometimes alternate);

blades ± lance-linear (lengths 10–15 times widths), 9–12(–20+) × 0.6–1.2(–1.5+) cm, bases rounded, margins obscurely toothed to subentire, apices ± attenuate, faces ± scabrellous.

Involucres

± hemispheric, 10–15+ mm diam.

± hemispheric to saucerlike, 11–15+ mm diam.

Ray florets

8–13;

laminae 15–25+ mm.

12–13;

laminae 15–25+ mm.

Disc florets

60–100+;

corollas yellow.

60–100+;

corollas yellow.

Phyllaries

18–30+ in 3–4 series, ± erect, oblong to elliptic, 6–10+ mm.

18–24+ in 2–3 series, ± erect to spreading, linear to lance-linear, 5–15+ mm.

Heads

borne singly.

borne singly or 3–5+ in loose, corymbiform arrays.

Cypselae

dark brown, ± elliptic, 10 mm, faces glabrous;

pappi 0–0.5 mm.

dark brown, oblanceolate to elliptic, 7 mm, faces glabrous;

pappi 0–0.5 mm.

2n

= 34.

= 34.

Verbesina rothrockii

Verbesina longifolia

Phenology Flowering (May–)Aug–Sep. Flowering (Jul–)Sep–Oct.
Habitat Rocky slopes, igneous or limestone substrates Rocky slopes
Elevation 1200–1800 m (3900–5900 ft) 1500–2400 m (4900–7900 ft)
Distribution
from FNA
AZ; NM; Mexico (Coahuila, Durango, Zacatecas)
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; NM; Mexico (Chihuahua, Durango)
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 21, p. 111. FNA vol. 21, p. 110.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Ecliptinae > Verbesina Asteraceae > tribe Heliantheae > subtribe Ecliptinae > Verbesina
Sibling taxa
V. alternifolia, V. aristata, V. chapmanii, V. dissita, V. encelioides, V. helianthoides, V. heterophylla, V. lindheimeri, V. longifolia, V. microptera, V. nana, V. occidentalis, V. oreophila, V. virginica, V. walteri
V. alternifolia, V. aristata, V. chapmanii, V. dissita, V. encelioides, V. helianthoides, V. heterophylla, V. lindheimeri, V. microptera, V. nana, V. occidentalis, V. oreophila, V. rothrockii, V. virginica, V. walteri
Synonyms Actinomeris longifolia
Name authority B. L. Robinson & Greenman: Proc. Amer. Acad. Arts 34: 541. (1899) (A. Gray) A. Gray: Proc. Amer. Acad. Arts 19: 12. (1883)
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