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evergreen buckthorn, holly leaf redberry, redberry

sawleaf buckthorn

Habit Shrubs or small trees, 1–4 m, unarmed. Shrubs to small trees, 0.8–2.5 m, unarmed.
Branchlets

gray, stiff, glabrous or densely and softly hirtellous.

gray-brown, 2 cm, 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, alternate to subopposite;

petiole 3–4 mm;

blade usually yellowish brown, rarely green, abaxially, green adaxially, elliptic to elliptic-lanceolate or elliptic-oblong, 1.5–5(–5.5) cm, herbaceous, base cuneate to rounded or truncate, margins serrulate to crenulate, apex obtuse, both surfaces minutely hirtellous, often more densely so abaxially;

secondary veins 5–8(–11) pairs, all diverging at nearly same angle.

Inflorescences

fascicles or flowers solitary.

fascicles or flowers solitary.

Pedicels

2–4 mm.

1–4 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 dark red to reddish brown, coriaceous, dull.

2n

= 24.

Rhamnus ilicifolia

Rhamnus serrata

Phenology Flowering Jan–Jun. Flowering Apr–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. Canyons, stream banks, open hillsides, ledges, ridges, among boulders, gravelly limestone hills, roadsides, mesic forests, woodlands.
Elevation 100–2200(–2400) m. (300–7200(–7900) ft.) 1500–2600 m. (4900–8500 ft.)
Distribution
from FNA
AZ; CA; NV; OR; Mexico (Baja California)
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; NM; TX; Mexico; Central America (Guatemala)
[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. smithii, R. utilis
Synonyms R. crocea subsp. ilicifolia, R. crocea var. ilicifolia R. fasciculata, R. serrata var. guatemalensis, R. smithii subsp. fasciculata
Name authority Kellogg: Proc. Calif. Acad. Sci. 2: 37. (1863) — (as ilicifolius) Humboldt & Bonpland ex Willdenow: in J. J. Roemer et al., Syst. Veg. 5: 295. (1819)
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