Grindelia lanceolata
gulf gumweed, narrowleaf gumweed, spiny tooth gumweed, Texan gumweed
erect, whitish, stramineous, or reddish, usually glabrous, rarely sparsely pilose near bases.
blades triangular, ovate, or oblong to lanceolate or linear, 25–60(–110) mm, lengths 3–12 times widths, bases cuneate or ± clasping, margins usually serrate to dentate (teeth apiculate to setose), rarely entire, apices acute to acuminate, faces usually glabrous (or, near margins, scabridulous, rarely puberulous) and usually not, rarely notably, gland-dotted.
broadly urceolate to globose, 8–15 × 10–20+ mm.
12–36;
laminae 10–16 mm.
in 5–6(–9) series, weakly spreading to appressed, filiform to linear or lanceolate, apices slightly recurved or straight to incurved, terete, slightly to moderately resinous.
usually in corymbiform arrays, rarely borne singly.
stramineous to grayish, 2–6 mm, apices coronate or knobby, faces smooth or striate;
pappi of 2 straight, smooth (apices often dilated), setiform awns 4–8 mm, usually equaling to slightly surpassing disc corollas.
= 12.
Grindelia lanceolata
Reports of Grindelia lanceolata from Connecticut, Mississippi, Ohio, Virginia, and Wisconsin are probably based on introductions. Plants of G. lanceolata from Oklahoma and Texas with cauline leaf blades mostly ovate to oblong (versus mostly lanceolate to linear) and outer phyllaries shorter than (versus ± equaling) the inner have been called var. texana or G. texana. Plants from coastal Texas called G. littoralis have densely gland-dotted leaves.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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