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saw-tooth bristleweed, saw-tooth goldenbush

narrow scale goldenbush, serpentine bristleweed

Habit Shrubs, 30–250 cm. Shrubs, 30–100 cm.
Stems

usually sparsely tomentose or pilose.

sparsely short-hispidulous.

Leaves

sessile;

blades oblong or oblong-obovate to widely obovate, 13–35(–50) × 5–17(–24) mm, coriaceous, bases clasping to subclasping, margins spinulose-dentate (teeth in 3–13 pairs), adaxial faces glabrous to sparsely puberulent.

sessile;

blades obovate to oblong, 15–25 × 5–12 mm, coriaceous, bases subclasping, margins coarsely spinulose-dentate or -serrate (with 5–11 pairs of teeth), faces glabrous.

Involucres

turbinate, 8–16 × 7–10 mm.

cuneate to very narrowly turbinate, 10–17 × 3–6 mm.

Ray florets

0.

0.

Disc florets

9–30;

corollas 9–11 mm.

4–8(–10);

corollas 7–9 mm.

Phyllaries

apically spreading to reflexed, oblong, apices with green area 1–2 mm, faces prominently stipitate-glandular (at least apically).

stiffly erect, almost completely stramineous, linear-lanceolate, faces glabrous except minutely gland-dotted at tips.

Heads

borne in racemo-spiciform or glomerate-spiciform arrays.

in densely spiciform arrays.

Cypselae

5–8 mm, glabrous.

5–8 mm, glabrous.

2n

= 10.

Hazardia squarrosa

Hazardia stenolepis

Phenology Flowering Sep–Nov.
Habitat Oak-pine woods
Elevation 150–2000 m (500–6600 ft)
Distribution
from FNA
CA; nw Mexico
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; Mexico (Baja California)
[BONAP county map]
Discussion

Varieties 3 (3 in the flora).

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

Hazardia stenolepis is distinguished by its hairy stems, glabrous, relatively small leaves, discoid heads, and long, narrow involucres with stramineous, linear-lanceolate phyllaries.

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

Key
1. Leaves sparsely puberulent, not resinous; involucres 8–12 mm; disc florets 9–16, corollas 9–10 mm
var. grindelioides
1. Leaves glabrous or sparsely puberulent, resinous; involucres 11–15 mm; disc florets 18–30, corollas 10–11 mm
→ 2
2. Stems glabrous or scabrous; phyllaries erect, ± obtuse-mucronate, glabrous, resinous
var. obtusa
2. Stems distally sparsely hairy or glabrescent; phyllaries recurved, obtuse to acute, glandular
var. squarrosa
Source FNA vol. 20, p. 448. FNA vol. 20, p. 448.
Parent taxa Asteraceae > tribe Astereae > Hazardia Asteraceae > tribe Astereae > Hazardia
Sibling taxa
H. brickellioides, H. cana, H. detonsa, H. orcuttii, H. stenolepis, H. whitneyi
H. brickellioides, H. cana, H. detonsa, H. orcuttii, H. squarrosa, H. whitneyi
Subordinate taxa
H. squarrosa var. grindelioides, H. squarrosa var. obtusa, H. squarrosa var. squarrosa
Synonyms Haplopappus squarrosus Haplopappus squarrosus subsp. stenolepis
Name authority (Hooker & Arnott) Greene: Erythea 2: 112. (1894) (H. M. Hall) Hoover: Vasc. Pl. San Luis Obispo Co., 296. (1970)
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