Flora of North America species comparison

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Madia subspicata

slender tarweed
Habit Plants 5–60 cm, self-compatible (heads not showy).
Stems

proximally ± villous, distally glandular-pubescent, glands yellowish, lateral branches not surpassing main stems.
Leaf

blades linear to lance-linear, 2–7 cm × 1–5 mm.
Involucres

globose or ovoid, 6–8 mm.
Ray florets

5–8;

corollas pale yellow, laminae 1–2.5 mm.
Disc florets

5–15, bisexual, fertile;

corollas 3–3.5 mm, pubescent;

anthers yellow to brownish.
Phyllaries

± hirsute and thick-stalked-glandular as well, glands golden yellow, apices ± erect, sulcate or flat.
Heads

in spiciform or spiciform-racemiform arrays (peduncles 0 or lengths usually less than 2 times heads).
Disc cypselae

similar.
Ray cypselae

black or brown, sometimes purple-mottled, dull, compressed, ± clavate, beakless.
Paleae

mostly persistent, distinct or connate less than 1/2 their lengths.
2n

= 16.

Madia subspicata
Phenology Flowering Apr–Jun.
Habitat Grasslands and open woodlands, often in shade
Elevation 50–800 m (200–2600 ft)
Distribution
from FNA
CA
[BONAP county map]
Discussion

Madia subspicata occurs locally in the central and northern Sierra Nevada foothills, sometimes with the morphologically similar M. gracilis.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 21, p. 306.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Madiinae > Madia
Sibling taxa
M. anomala, M. citrigracilis, M. citriodora, M. elegans, M. exigua, M. glomerata, M. gracilis, M. radiata, M. sativa
Name authority D. D. Keck: Publ. Carnegie Inst. Wash. 564: 45. (1945)
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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