Flora of North America species comparison

The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

Hazardia detonsa

island bristleweed, island hazardia
Habit Shrubs, 60–250 cm.
Stems

lanate-tomentose.
Leaves

subsessile or subpetiolate;

blades obovate, 40–140 × 10–50 mm, subcoriaceous, bases not clasping, margins serrulate to subentire, abaxial faces densely lanate-tomentose, adaxial densely short-tomentose.
Involucres

campanulate, 10–13 × 10–13 mm.
Ray florets

6–14, fertile;

corollas shorter than involucre, inconspicuous.
Disc florets

30–40;

corollas 8–10 mm.
Phyllaries

erect, oblong, apices acute, faces densely woolly.
Heads

in thyrsiform to subcorymbiform heads.
Cypselae

3–4 mm, canescent.
2n

= 10.

Hazardia detonsa
Phenology Flowering Apr–Nov.
Habitat Open, rocky hillsides, canyon walls, often with Pinus, Quercus, Ceanothus, Rhus, Arctostaphylos
Elevation 10–300 m (0–1000 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Hazardia detonsa is known from Anacapa, Santa Rosa, and Santa Cruz islands. It is little differentiated from H. cana and clearly its evolutionary sister. In both taxa, the ray and disc florets often change to red-purple with maturity.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 449.
Parent taxa Asteraceae > tribe Astereae > Hazardia
Sibling taxa
H. brickellioides, H. cana, H. orcuttii, H. squarrosa, H. stenolepis, H. whitneyi
Synonyms Corethrogyne detonsa, Haplopappus detonsus
Name authority (Greene) Greene: Pittonia 1: 29. (1887)
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).



Type/paste one or more Latin names into the boxes above; matching taxa will show up below the box as you type. You can use the up/down arrow keys to move through the list.

(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Fabaceae, Apiaceae, Boraginaceae, and Polemoniaceae.)

Choose a data source: Flora of North America

The species comparison tool is brought to you by:
Northwest Wildflowers