Flora of North America species comparison

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Anisocarpus madioides

anisocarpus, tarweed, woodland madia, woodland tarplant, woodland tarweed
Habit Plants 15–80 cm.
Leaf

blades dark green, 40–130 × 5–15 mm, margins entire or toothed, apices acute.
Involucres

± globose, 4–6 mm.
Ray florets

7–15.
Disc florets

5–30, functionally staminate.
Ray cypselae

compressed, 3–5 mm.
Disc

pappi 5–8 linear, lanceolate, or quadrate, fimbrillate or erose scales 0.2–1.5 mm.
2n

= 14.

Anisocarpus madioides
Phenology Flowering Apr–Sep.
Habitat Forests, woodlands
Elevation 10–1300 m (0–4300 ft)
Distribution
from FNA
CA; OR; WA; BC
[WildflowerSearch map]
[BONAP county map]
Discussion

Like some other self-compatible tarweeds, Anisocarpus madioides ranges beyond the California Floristic Province and is the most widespread perennial in Madiinae. It occurs in the Pacific coast ranges from central California (Santa Lucia Range) north to Vancouver Island, British Columbia; outliers include populations in the Feather River region of the northern Sierra Nevada and in the Agua Tibia Mountains of southern California.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 21, p. 301.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Madiinae > Anisocarpus
Sibling taxa
A. scabridus
Synonyms Madia madioides
Name authority Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 388. (1841)
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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