Flora of North America species comparison

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Hazardia squarrosa

Hazardia squarrosa var. squarrosa

saw-tooth bristleweed, saw-tooth goldenbush
Photo is of parent taxon

saw tooth goldenbush
Habit Shrubs, 30–250 cm.
Stems

usually sparsely tomentose or pilose.

distally sparsely hairy or glabrescent.
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.

glabrous or sparsely puberulent, resinous.
Involucres

turbinate, 8–16 × 7–10 mm.

11–15 mm.
Ray florets

0.

Disc florets

9–30;

corollas 9–11 mm.

18–30;

corollas 10–11 mm.
Phyllaries

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

recurved, margins usually glandular, apices obtuse to acute, faces glandular.
Heads

borne in racemo-spiciform or glomerate-spiciform arrays.

Cypselae

5–8 mm, glabrous.

Hazardia squarrosa

Hazardia squarrosa var. squarrosa
Phenology Flowering Aug–Oct.
Habitat Foothills and coastal mountains, usually with Quercus, Artemisia, Arctostaphylos, Ceanothus, Heteromeles, Pinus
Elevation 20–700 m (100–2300 ft)
Distribution
from FNA
CA; nw Mexico
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[BONAP county map]
Discussion

Varieties 3 (3 in the flora).

(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 > Hazardia squarrosa
Sibling taxa
H. brickellioides, H. cana, H. detonsa, H. orcuttii, H. stenolepis, H. whitneyi
H. squarrosa var. grindelioides, H. squarrosa var. obtusa
Subordinate taxa
H. squarrosa var. grindelioides, H. squarrosa var. obtusa, H. squarrosa var. squarrosa
Synonyms Haplopappus squarrosus
Name authority (Hooker & Arnott) Greene: Erythea 2: 112. (1894) unknown
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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