Flora of North America species comparison

4-8(-12) dm, sparingly prickly.

widely branching, 4-8 dm, moderately to copiously prickly throughout.

blades: abaxial surface moderately prickly on veins, adaxial surface unarmed to sparingly prickly on main veins;

basal and proximal lobed to 4/5 distance to midrib.

blades: abaxial surface prickly on main veins, adaxial surface prickly or unarmed on main veins, densely prickly-hispid to glabrous between veins;

basal lobed 2/3-4/5 distance to midrib, lobe apices angular, marginal teeth 3 mm or more;

distal clasping.

buds broadly ellipsoid-oblong, body 12-20 × 10-15 mm, somewhat prickly;

sepal horns often angular in cross section, 5-10 mm, slightly prickly basally.

buds subglobose to oblong, body 16-25 × 15-20 mm, prickly;

sepal horns angular in cross section, 8-14(-18) mm, apical prickle indurate.

6-9 cm broad, usually closely subtended by 1-2 foliaceous bracts;

petals white or lavender;

stamens 150 or more;

filaments lemon yellow to red;

pistil 3-6-carpellate.

8-11 cm broad, closely subtended by 1-2 foliaceous bracts;

petals white;

stamens 150 or more;

filaments pale yellow;

pistil 4-5-carpellate.

narrowly to broadly ellipsoid, 25-40(-50) × 8-15(-18) mm (including stigma and excluding prickles), prickly, surface clearly visible;

prickles unequal, longest 5-7(-10) mm.

ellipsoid, oblong or lance-ovoid, 25-50 × 10-18 mm (including stigma and excluding prickles);

prickles basally herbaceous, spreading or reflexed, unequal, longest branched, 8-15 mm.

ca. 1.5 mm.

2-2.5 mm.

= 28, 56.