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Montana Field Guide

Montana Field Guides

Fetid Dogweed - Dyssodia papposa


Global Rank: G5
State Rank: S4

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value:

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General Description
Fibrous-rooted annual. Stems erect to ascending, 5–20 cm, highly branched. Herbage ill-smelling, glabrous or puberulent with sessile glands. Leaves cauline, opposite, petiolate; the blades ovate, 1–2 cm mm long, deeply 1 to 2-times divided into well-separated linear to lanceolate segments. Inflorescence leafy-cymose; heads terminating numerous branches. Heads radiate; involucres campanulate, 5–8 mm high; phyllaries amber-glandular, 6 to 12 in 2 unequal series; outer green, linear-lanceolate; inner purplish, scarious, ovate; receptacle convex, glabrous. Ray flowers 5 to 8, female, orangish; ligules 1–2 mm long. Disk flowers perfect, 12 to 50, yellow to reddish; corolla 2–3 mm long; style appendages elongate, hairy. Pappus 15 to 20 scales in 2 series, each divided into 5 to 10 bristles. Achenes obconic, 3–4 mm long, long-strigose (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
MT to NY south to CA, AZ, NM, TX, TN, WV and Mexico (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 1

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Often compacted soil along roads, streambanks; plains, valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Fetid Dogweed — Dyssodia papposa.  Montana Field Guide.  .  Retrieved on , from