Flora of North America species comparison

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Hazardia squarrosa

Hazardia squarrosa var. grindelioides

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

gum plant goldenbush, sawtooth bristleweed
Habit Shrubs, 30–250 cm.
Stems

usually sparsely tomentose or pilose.

sparsely puberulent, often tomentulose proximal to heads.
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.

sparsely puberulent, not resinous.
Involucres

turbinate, 8–16 × 7–10 mm.

8–12 mm.
Ray florets

0.

Disc florets

9–30;

corollas 9–11 mm.

9–16;

corollas 9–10 mm.
Phyllaries

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

recurved, margins glandular (if at all), apices obtuse to acute, faces apically cinereous.
Heads

borne in racemo-spiciform or glomerate-spiciform arrays.

Cypselae

5–8 mm, glabrous.

2n

= 10.

Hazardia squarrosa

Hazardia squarrosa var. grindelioides
Phenology Flowering Jul–Oct.
Habitat Chaparral in foothills, coastal mountains, and islands, usually with Quercus, Pinus, Arctostaphylos, Rhus, Heteromeles, Adenostoma, Ceanothus
Elevation 100–1300 m (300–4300 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.)
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. obtusa, H. squarrosa var. squarrosa
Subordinate taxa
H. squarrosa var. grindelioides, H. squarrosa var. obtusa, H. squarrosa var. squarrosa
Synonyms Haplopappus squarrosus Pyrrocoma grindelioides, Haplopappus squarrosus subsp. grindelioides
Name authority (Hooker & Arnott) Greene: Erythea 2: 112. (1894) (de Candolle) W. D. Clark: Madroño 26: 122. (1979)
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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