Lactuca hirsuta
Lactuca canadensis
hairy lettuce, tall hairy lettuce
Canada lettuce, Canada wild lettuce, Canadian wild lettuce, Florida blue lettuce, tall lettuce, wild lettuce
on proximal 1/3–2/3 of each stem;
blades of undivided cauline leaves ± ovate, margins denticulate (sometimes ± ciliate), midribs usually piloso-setose.
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.
12–18+ mm.
10–12+ mm.
12–24+;
corollas usually yellow, sometimes drying bluish, usually deliquescent.
15–20+;
corollas bluish or yellowish, usually deliquescent.
usually reflexed in fruit.
usually reflexed in fruit.
in corymbiform to paniculiform arrays.
in ± corymbiform to paniculiform arrays.
bodies brown, ± flattened, elliptic, 4.5–5+ mm, beaks ± filiform, 2.5–3.5 mm, faces 1(–3)-nerved;
pappi white, 6.5–8(–10+) mm.
bodies brown (often mottled), ± flattened, elliptic, 5–6 mm, beaks ± filiform, 1–3 mm, faces 1(–3)-nerved;
pappi white, 5–6 mm.
= 34.
= 34.
Lactuca hirsuta
Lactuca canadensis
The type of Lactuca hirsuta may be conspecific with that of L. graminifolia.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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