Flora of North America species comparison

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Madia glomerata

cluster tarweed, mountain tarplant, mountain tarweed
Habit Plants 5–120 cm, self-compatible (heads not showy).
Stems

proximally villous to hispid, glandular-pubescent distally, glands yellowish or black, lateral branches sometimes surpassing main stems.
Leaf

blades linear to lance-linear, 2–10 cm × 2–7 mm.
Involucres

narrowly ovoid or ellipsoid, 5.5–9 mm.
Ray florets

0 or 1–3;

corollas greenish yellow to purplish, laminae 1–3 mm.
Disc florets

1–5(–12), bisexual, fertile;

corollas 3–4.5 mm, pubescent;

anthers ± dark purple.
Phyllaries

± pilose and glandular-pubescent, glands yellowish or black, apices erect or reflexed, ± flat.
Heads

usually in crowded glomerules, sometimes in corymbiform or paniculiform arrays.
Disc cypselae

similar.
Ray cypselae

black, dull, compressed, beakless.
Paleae

mostly persistent, distinct.
2n

= 28.

Madia glomerata
Phenology Flowering Jun–Sep.
Habitat Openings in grasslands, meadows, swales, shrublands, woodlands, forests, edges of marshes, lakes, or watercourses, disturbed sites, often in coarse, sandy or gravelly soils
Elevation 0–3100 m (0–10200 ft)
Distribution
from FNA
AK; AZ; CA; CO; CT; IA; ID; ME; MI; MN; MT; ND; NM; NV; OR; SD; UT; VT; WA; WY; AB; BC; MB; ON; QC; SK; YT
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Discussion

Madia glomerata has the most extensive North American distribution of any species in Madiinae. At southern latitudes, M. glomerata occurs mostly in montane settings. Occurrences in eastern North America are mostly local and widely scattered.

(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. gracilis, M. radiata, M. sativa, M. subspicata
Name authority Hooker: Fl. Bor.-Amer. 2: 24. (1834)
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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(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 Apiaceae, Boraginaceae, and Polemoniaceae.)

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