Flora of North America species comparison

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Grindelia integrifolia

Puget sound gumplant, Puget sound gumweed, Willamette Valley gumweed
Habit Perennials, 20–80(–100+) cm.
Stems

erect, stramineous to red-brown, villous and/or stipitate-glandular (at least distally).
Cauline leaf

blades lanceolate or lance-attenuate (broadest proximal to midpoints), 35–70(–90) mm, lengths 2–4(–10) times widths, bases usually clasping (± cordate), margins usually entire, rarely serrate to denticulate (teeth apiculate), apices acute to attenuate, faces stipitate-glandular.
Involucres

broadly urceolate to globose, 8–12 × 12–20+ mm (usually subtended by leaflike bracts).
Ray florets

10–35;

laminae 8–15(–20) mm.
Phyllaries

in 5–6 series, spreading to appressed, linear or to lance-linear or lanceolate, apices slightly recurved, straight, or incurved, filiform to subulate, ± stipitate-glandular, sometimes moderately resinous as well.
Heads

in corymbiform arrays or borne singly.
Cypselae

stramineous, 3–5 mm, apices coronate to knobby, faces smooth or striate;

pappi of 2–3 contorted to curled, usually smooth, sometimes barbellulate, subulate scales 2.5–4 mm, shorter than disc corollas.
2n

= 12.

Grindelia integrifolia
Phenology Flowering Jun–Sep.
Habitat Meadows, ditches, marshlands
Elevation 0–200 m (0–700 ft)
Distribution
from FNA
OR; WA; BC
[WildflowerSearch map]
[BONAP county map]
Discussion

But for the stipitate-glandular apices of the phyllaries, plants of Grindelia integrifolia are very much like some plants treated here in G. hirsutula. Taxonomic status for plants that have been called G. integrifolia should be reconsidered.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 431.
Parent taxa Asteraceae > tribe Astereae > Grindelia
Sibling taxa
G. adenodonta, G. arizonica, G. ciliata, G. decumbens, G. fraxinipratensis, G. grandiflora, G. havardii, G. hirsutula, G. howellii, G. lanceolata, G. microcephala, G. oölepis, G. oxylepis, G. pusilla, G. scabra, G. squarrosa, G. subalpina
Name authority de Candolle: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 315. (1836)
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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