Flora of North America species comparison

thorns abundant;

young twigs yellowish brown-hairy, glabrescent.

thorns sparse;

young twigs tomentose, hairs dense grayish or yellowish (glabrescent 2d year).

stipules 3–7 mm;

petiole 2–6 mm;

blade elliptic, oblong, or oblong-obovate, 1.5–5 × 1–2 cm, base rounded to cuneate, margins entire or remotely serrulate distally (on vigorous shoots), apex obtuse, apiculate, or aristate, surfaces yellowish brown-hairy, glabrescent (abaxial becoming slightly glaucescent).

stipules 4–8 mm;

petiole 1–2.5 mm, tomentose;

blade narrowly oblong to slightly oblanceolate, 1.5–5 × 0.4–1 cm, base rounded to cuneate, margins entire (sometimes revolute), apex apiculate, obtuse, or retuse, surfaces gray-tomentose (abaxial remaining gray-tomentose, adaxial glabrescent).

3–4 cm diam.

2–4 cm diam.

5–10 mm, yellowish brown-hairy.

1–3 mm, gray-tomentose.

8–10 mm diam.;

hypanthium hairy;

calyx brown- or yellowish brown-puberulent when young, glabrescent, sepals broadly elliptic or triangular, 1–1.5 mm, apex obtuse;

petals ovate, 4–5 mm, apex slightly apiculate.

3–8 mm diam.;

hypanthium gray-tomentose;

calyx persistently gray-tomentose, sepals triangular, 1 mm, apex acute;

petals suborbiculate, 3–4 mm, apex rounded.

bright red, 4–7 mm diam.;

pedicels 5–12 mm.

red, depressed globose, 4–8 mm diam.;

pedicels 2–5 mm.