Rhamnus ilicifolia |
Rhamnus smithii |
|
---|---|---|
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 |
AZ; CA; NV; OR; Mexico (Baja California)
|
CO; NM
|
Source | FNA vol. 12, p. 48. | FNA vol. 12, p. 49. |
Parent taxa | Rhamnaceae > Rhamnus | Rhamnaceae > Rhamnus |
Sibling taxa | ||
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) |
Web links |