Flora of North America species comparison

twigs: new growth orange-brown or green tinged with red, ± pubescent, 1-year old brown, older gray;

thorns on twigs ± straight or recurved, 2-years old shiny black to chestnut brown, fine or stouter, (2–)3–4(–6.5) cm.

numerous;

twigs: new growth olive- or orange-green, slender, marked by large, oblong, pale lenticels, glabrous, 1-year old light, grayish, or deep reddish brown, at end of 1d year often deep red-brown, 2-years old gray or light brown tinged with red, older ashy gray;

thorns on twigs numerous, straight, 1-year old shiny, deep red-brown, older dark gray, ultimately ashy gray, stout, 3–6 cm.

petiole 4–6 mm, length 13–18% blade, glabrescent, eglandular;

blade narrowly obovate to oblanceolate, (2.5–)3(–4) cm, coriaceous, base narrowly cuneate, lobes 0, margins finely crenate or serrate except at base, or only beyond widest part, venation craspedodromous, veins 4–6 per side, apex subacute to obtuse, lustrous, abaxial surface ± densely pilose on veins, sometimes pubescent on surface, adaxial hairy young, glabrescent or becoming scabrous.

stipules oblong-obovate, to falcate and acuminate on extension shoots, glandular-serrate, acuminate, villous;

petiole length 33–40% blade, slightly winged distally, adaxially villous young, glandular, glands minute, dark red;

blade ovate-oblong to oblong, (4–)5–7(–8) cm (more than 1/2 grown at anthesis), on extension shoots similar, larger, thin to chartaceous, base cuneate to nearly truncate, lobes 5 or 6 per side, sinuses moderately deep (max LII 15%), lobe apex acute, ± triangular, margins serrulate, veins 5–7 per side, apex acute, abaxial surface glabrous, adaxial appressed-scabrous, glabrescent.

8–12-flowered;

branches densely pubescent;

bracteoles linear, margins glandular.

9–12-flowered;

branches villous;

bracteoles linear, small, membranous, margins sessile-glandular.

10–20 mm diam.;

hypanthium villous or glabrous;

sepals 3–5 mm, margins entire, abaxially glabrous;

stamens 10 or 20, anthers cream or pink;

styles 2 or 3.

13–15 mm diam.;

hypanthium glabrous or pubescent;

sepals reflexed after flowering, tapering from broad bases, short, margins minutely, bright red glandular, apex acute, abaxially villous;

stamens 20, anthers pale yellow, small;

styles 4 or 5.

reddish to yellow, suborbicular, 8–10 mm diam., glabrous;

sepals erose or patent;

pyrenes 2 or 3.

in broad, multi-fruited clusters, drooping or erect on stout branches;

reddish, suborbicular to oblong, 12–14 mm diam., glabrous or pubescent;

sepals persistent, sometimes until following spring, prominent, appressed to spreading;

pyrenes 4 or 5, full and rounded at ends.