Flora of North America species comparison

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

2-8 dm, scattered-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: surfaces shallowly to deeply lobed, thick, leathery, surfaces unarmed to sparingly prickly, especially abaxial surface on veins;

distal clasping.

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

sepal horns terete, 5-10 mm, unarmed.

buds subglobose to ellipsoid-ovoid, body 10-18 × 8-14 mm, sparingly prickly;

sepal horns terete or flattened in cross section, 5-7 mm.

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.

4-9 cm broad;

petals white;

stamens 100-120;

filaments pale yellow;

pistil 3-5-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.

ovoid to lanceoloid, 25-35 × 10-16 mm (including stigma and excluding prickles), prickly, surface clearly visible, prickles simple, well spaced, subequal, longest 5-7 mm.

1.6-2 mm.

1.5-2 mm.

= 28.