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evergreen buckthorn, holly leaf redberry, redberry

Smith's buckthorn

Habit Shrubs or small trees, 1–4 m, unarmed. Shrubs, 1–3 m, unarmed.
Branchlets

gray, stiff, glabrous or densely and softly hirtellous.

greenish to brown, 5 cm, minutely puberulent, glabrescent.

Leaves

persistent, alternate;

petiole 2–10 mm;

blade usually dull green, sometimes reddish brown, abaxially, glossy to dull green adaxially, broadly elliptic to oblong, orbiculate, or ovate, 2–4.5 cm, distinctly coriaceous, base cuneate to nearly truncate, margins spinulose to spinose-dentate, apex rounded or obtuse to truncate or emarginate, both surfaces glabrous;

secondary veins 5–7 pairs, all diverging at nearly same angle.

deciduous, usually alternate, rarely subopposite;

petiole 3–6(–8) mm;

blade green abaxially, glossy green or yellow-green adaxially, usually lanceolate, sometimes elliptic-lanceolate or oblong-lanceolate, 3–8 cm, herbaceous to subcoriaceous, base cuneate, margins crenulate to serrulate, apex acute to obtuse or rounded, both surfaces glabrous;

secondary veins 7–11 pairs, all diverging at nearly same angle.

Inflorescences

fascicles or flowers solitary.

axillary fascicles or flowers solitary.

Pedicels

2–4 mm.

(0–)0.5–2.5 mm.

Drupes

red, globose, 4–6(–8) mm;

stones 2.

black, globose or slightly elongate, 4–6(–8) mm;

stones 2.

Sepals

4.

4.

Petals

0.

4.

Bud

scales pale golden to yellowish, thin, glossy.

2n

= 24.

Rhamnus ilicifolia

Rhamnus smithii

Phenology Flowering Jan–Jun. Flowering May–Jun.
Habitat Canyon slopes and bottoms, rock faces, open hillsides, sandstone ridges, serpentine slopes, roadsides, stream benches, riparian areas, meadows, coastal sage scrub, chaparral/desert transition, chaparral, woodlands, montane forests. Dry, grassy hillsides, gravelly terraces, shale knolls, mesic slopes, rocky meadows, sandy alluvium, sagebrush, conifer forests.
Elevation 100–2200(–2400) m. (300–7200(–7900) ft.) 2100–2600(–3000) m. (6900–8500(–9800) ft.)
Distribution
from FNA
AZ; CA; NV; OR; Mexico (Baja California)
[WildflowerSearch map]
[BONAP county map]
from FNA
CO; NM
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 12, p. 48. FNA vol. 12, p. 49.
Parent taxa Rhamnaceae > Rhamnus Rhamnaceae > Rhamnus
Sibling taxa
R. alaternus, R. alnifolia, R. arguta, R. cathartica, R. crocea, R. davurica, R. japonica, R. lanceolata, R. pilosa, R. pirifolia, R. serrata, R. smithii, R. utilis
R. alaternus, R. alnifolia, R. arguta, R. cathartica, R. crocea, R. davurica, R. ilicifolia, R. japonica, R. lanceolata, R. pilosa, R. pirifolia, R. serrata, R. utilis
Synonyms R. crocea subsp. ilicifolia, R. crocea var. ilicifolia
Name authority Kellogg: Proc. Calif. Acad. Sci. 2: 37. (1863) — (as ilicifolius) Greene: Pittonia 3: 17. (1896)
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