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Hall's mule-ears

mule-ears

Habit Plants 50–100 cm. Perennials, 5–60(–100) cm (taproots relatively massive; caudices sometimes branched).
Stems

erect, usually branched distally.

erect and branched (mostly distally), or decumbent (and seldom branched distally).

Leaves

basal and cauline (basal usually scalelike on flowering stems, well-formed on non-flowering shoots); alternate;

petiolate;

blades (3-or 5-nerved or pinnately nerved), cordate-ovate, deltate, deltate-triangular, ovate, ovate-lanceolate, or suborbiculate, bases broadly cuneate, subcordate, or truncate, margins entire or dentate to crenate, faces glabrous or hairy (often gland-dotted).

Cauline leaves

blades ovate-lanceolate to deltate, (8–)10–15(–20) cm, bases truncate to subcordate, margins entire or finely dentate or serrulate, faces tomentulose to pilosulous (and gland-dotted).

Involucres

hemispheric, 25–40 mm diam.

campanulate to ± hemispheric, 12–40 mm diam.

Receptacles

flat to convex, paleate (paleae persistent, conduplicate, chartaceous).

Ray florets

10–14(–23), laminae (30–)50–60 mm.

0 or (1–)5–21+, pistillate, fertile;

corollas yellow.

Disc florets

50–150+, bisexual, fertile;

corollas yellow, tubes shorter than cylindric throats, lobes 5, lance-deltate (style branches stigmatic in 2, barely distinct lines, appendages filiform).

Phyllaries

persistent, (8–)12–26+ in 2–3+ series (subequal to unequal, outer usually surpassing inner).

Outer phyllaries

lanceolate, 20–30 mm (equaling or surpassing discs, tips often spreading to squarrose).

Heads

held beyond leaves.

radiate or discoid, borne singly (terminal) or in ± racemiform arrays.

Cypselae

8–12 mm, usually glabrous, sometimes distally strigillose;

pappi coroniform (lacerate, projected into scales on angles), (0.5–)1–2(–3) mm.

± prismatic, 3–4-angled (faces glabrous or strigillose);

pappi usually persistent, coroniform (± lacerate, sometimes with 1–4 teeth or scales), sometimes 0.

x

= 19.

2n

= 38.

Agnorhiza elata

Agnorhiza

Phenology Flowering Jun–Jul(–Aug).
Habitat Open pine forests
Elevation 900–1200 m (3000–3900 ft)
Distribution
from FNA
CA
[BONAP county map]
from FNA
CA; nw Mexico
[BONAP county map]
Discussion

Agnorhiza elata is known only from foothills of the Sierra Nevada.

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

Species 5 (5 in the flora).

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

Key
1. Plants (5–)15–30(–45+) cm; stems decumbent, seldom distally branched; cauline leaves: blades ovate, suborbiculate, elliptic, rounded-deltate, or oblong; involucres ± campanulate, 12–25(–30+) mm diam
→ 2
1. Plants (20–)40–100 cm; stems erect, usually distally branched; cauline leaves: blades deltate, ovate, or ovate-lanceolate; involucres ± hemispheric, (15–)20–40 mm diam
→ 3
2. Leaves glabrous (shining, finely gland-dotted, glutinous); heads held among or beyond leaves; ray florets (7–)8–12, laminae (12–)20–30(–35) mm; cypselae 7–9 mm; pappi 0 or coroniform, 0.1–0.3 mm
A. bolanderi
2. Leaves silky-villous to strigillose, glabrescent; heads in axils of (and overtopped by) leaves; ray florets 5–8(–9), laminae 8–18 mm; cypselae 9–10 mm; pappi coroniform, 1–1.5+ mm
A. ovata
3. Ray florets 0 or 2–3
A. invenusta
3. Ray florets 10–23
→ 4
4. Leaf blades: faces tomentulose to pilosulous (and gland-dotted); cypselae 8–12 mm; pappi (0.5–)1–2(–3) mm
A. elata
4. Leaf blades: faces sparsely hispid or scabrous (and finely gland-dotted, green, shin-ing, often vernicose); cypselae ca. 6 mm; pappi 0.1–1 mm
A. reticulata
Source FNA vol. 21, p. 105. FNA vol. 21, p. 104. Author: William A. Weber.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Ecliptinae > Agnorhiza Asteraceae > tribe Heliantheae > subtribe Ecliptinae
Sibling taxa
A. bolanderi, A. invenusta, A. ovata, A. reticulata
Subordinate taxa
A. bolanderi, A. elata, A. invenusta, A. ovata, A. reticulata
Synonyms Wyethia elata Balsamorhiza section A.
Name authority (H. M. Hall) W. A. Weber: Phytologia 85: 19. (1999) (Jepson) W. A. Weber: Phytologia 85: 19. (1999)
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