Rhamnus ilicifolia |
Rhamnus serrata |
|
---|---|---|
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 |
AZ; CA; NV; OR; Mexico (Baja California)
|
AZ; NM; TX; Mexico; Central America (Guatemala) |
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 | 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) |
Web links |