Lactuca canadensis
Lactuca graminifolia
Canada lettuce, Canada wild lettuce, Canadian wild lettuce, Florida blue lettuce, tall lettuce, wild lettuce
grass-leaf lettuce
on proximal 1/2–3/4 of each stem;
blades of undivided cauline leaves oblong, obovate, or lanceolate to spatulate or lance-linear, margins entire or denticulate, midribs sometimes sparsely pilose.
on proximal 1/3–1/2 of each stem;
blades of undivided cauline leaves spatulate to lance-linear, margins entire or denticulate, midribs sometimes setose.
10–12+ mm.
12–20+ mm.
15–20+;
corollas bluish or yellowish, usually deliquescent.
15–20+;
corollas bluish to purplish, usually deliquescent.
usually reflexed in fruit.
usually reflexed in fruit.
in ± corymbiform to paniculiform arrays.
in ± paniculiform arrays.
bodies brown (often mottled), ± flattened, elliptic, 5–6 mm, beaks ± filiform, 1–3 mm, faces 1(–3)-nerved;
pappi white, 5–6 mm.
bodies brown (often mottled), ± flattened, elliptic, 5–6 mm, beaks ± filiform, 2–4 mm, faces 1(–3)-nerved;
pappi white, 5–9 mm.
= 34.
= 34.
Lactuca canadensis
Lactuca graminifolia
Plants in the western populations of Lactuca graminifolia have been called L. graminifolia var. arizonica McVaugh; they may belong to a Mexican species.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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BC, 
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OR, 
WA - Local Web sites: CalFlora, CalPhotos,
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MI Flora, 
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PNW Herbaria 
WildflowerSearch
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