Flora of North America species comparison

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

3-8 dm, 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 prickly on veins, adaxial surface unarmed or sparingly prickly on veins;

proximal lobed 3/4-5/6 distance to midrib.

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

sepal horns terete, 5-10 mm, unarmed.

buds ellipsoid-oblong, body 15-20 × 13-16 mm, prickly;

sepal horns terete, 7-12 mm, unarmed or with a few basal prickles.

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.

7-12 cm broad, often subtended by 1-2 foliaceous bracts;

petals bright yellow to golden or bronze;

stamens ca. 150;

filaments red or purplish;

pistil 4-5-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.

narrowly ellipsoid-oblong, 25-35 × 12-16 mm (including stigma and excluding prickles), coarsely prickly, surface clearly visible, prickles very unequal, longest ca. 8 mm.

1.6-2 mm.

1.5-1.7 mm.

= 28.

= 28.