Flora of North America species comparison

often branching from base, 2.5-8 dm, unarmed or sparingly prickly.

branching distally, 3-10 dm, sparingly prickly.

blades: surfaces unarmed or sparingly prickly on veins;

proximal lobed 1/2 or more distance to midrib;

distal more shallowly lobed, mostly clasping.

blades: abaxial surface sparingly prickly on veins, adaxial surface usually unarmed;

proximal deeply lobed nearly to midrib;

distal more shallowly lobed, usually clasping.

buds subglobose, body 10-15 × 9-13 mm, unarmed or sparingly prickly;

sepal horns terete, 5-10 mm, unarmed.

buds oblong, body 8-18 × 4-11 mm, with 4-10 prickles per sepal;

sepal horns terete, 5-12 mm, unarmed.

4-7 cm broad, subtended by 1-2 foliaceous bracts;

petals bright yellow or rarely pale lemon yellow;

stamens 30-50;

filaments yellow;

pistil 4-6-carpellate.

3-7 cm broad, closely subtended by 1-2 foliaceous bracts;

petals lemon yellow or rarely darker yellow;

stamens 20-75;

filaments yellow;

pistil 3-6-carpellate.

oblong to broadly ellipsoid, 25-45 × 12-20 mm (including stigma and excluding prickles when present), unarmed or prickly, longest prickles 6-10 mm.

ovoid-ellipsoid to oblong, 20-50 × 10-18 mm (including stigma and excluding prickles), longest prickles 8-12 mm.

1.6-2 mm.

1.5-2 mm.

= 28.

= 56.