Flora of North America species comparison

branching distally, 3-10 dm, sparingly prickly.

2-8 dm, scattered-prickly.

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

proximal deeply lobed nearly to midrib;

distal more shallowly lobed, usually clasping.

blades: surfaces shallowly to deeply lobed, thick, leathery, surfaces unarmed to sparingly prickly, especially abaxial surface on veins;

distal clasping.

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

sepal horns terete, 5-12 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.

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.

4-9 cm broad;

petals white;

stamens 100-120;

filaments pale yellow;

pistil 3-5-carpellate.

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

1.5-2 mm.

1.5-2 mm.

= 56.