Ambrosia tomentosa Nutt.
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Asteraceae
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Scientific Name
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Description
Species Description - Colonial perennial from creeping roots; lvs all or nearly all alternate, densely and conspicuously short-white-hairy beneath, greener and less hairy above, openly subbipinnatifid to subtripinnatifid with short and broad ultimate segments, the slender midstrip beset with small segments between the major ones; fruiting invols 4–6 mm, 2-seeded, with 2 sharp beaks and to 10 short spines in one or more cycles. Plains sp., casually intr. as far e. as Wis. and Ill. May–Aug. (Franseria discolor; Gaertneria d. not Franseria tomentosa, properly A. grayi (A. Nelson) Shinners, another Great Plains sp., with less dissected lvs that have a large terminal segment)
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Common Names
skeletonleaf bursage