Rhamnus alaternus

Linnaeus

Sp. Pl. 1: 193. 1753.

Common names: Italian or evergreen buckthorn
Introduced
Treatment appears in FNA Volume 12. Treatment on page 50. Mentioned on page 46.

Shrubs, 0.5–6 (–10) m, unarmed. Branchlets purplish brown, puberulent. Leaves persistent, alternate; petiole 4–10 mm; blade dull to glossy yellowish green on both surfaces, elliptic to elliptic-obovate, ovate, or ovatelanceolate, 2–4 (–6) cm, distinctly coriaceous, base acute to obtuse, margins sharply serrate to spinulose-serrate, apex acute to subspinulose, both surfaces glabrous except abaxial vein-axils tomentose; secondary-veins (3–) 4–5 pairs, basal pair diverging much more acutely than distal pairs. Inflorescences cymes or flowers solitary. Pedicels 2–6 mm. Sepals 5. Petals 0. Drupes dark red, becoming black, globose, 5–7 mm; stones 3.


Phenology: Flowering (Feb–)Mar–Jun.
Habitat: Woodland edges, fencerows, low areas, stream banks, canyons, arroyos.
Elevation: 0–400 m.

Distribution

V12 416-distribution-map.jpg

Introduced; Calif., Europe, also in Pacific Islands (New Zealand), Australia

Discussion

Selected References

None.

Lower Taxa

None.

"thin" is not a number.

... more about "Rhamnus alaternus"
perigynous +  and epigynous +
subspinulose +
Guy L. Nesom +  and John O. Sawyer† +
Linnaeus +
acute +  and obtuse +
4 cm40 mm <br />0.04 m <br /> (6 cm60 mm <br />0.06 m <br />) +
yellowish green +
3[-5]-veined +  and pinnate +
spinulose +, spinose +, serrate +  and entire +
denticulate +, dentate +, crenulate +, crenate +  and serrulate +
dull +  and glossy +
elliptic;elliptic-obovate ovate or ovatelanceolate +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
coriaceous +
Italian or evergreen buckthorn +
Calif. +, Europe +, also in Pacific Islands (New Zealand) +  and Australia +
black +  and dark red +
globose +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0–400 m. +
bisexual +  and unisexual +
Woodland edges, fencerows, low areas, stream banks, canyons, arroyos. +
circumscissile +
free +  and adnate +
campanulate +  and cupulate +
unisexual +  and bisexual +
persistent +
serrate to spinulose-serrate +
intrastaminal +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
not fleshy +
perigynous +  and epigynous +
yellowish +  and cream +
adnate +  and distinct +
not clawed +  and spatulate +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Flowering (Feb–)Mar–Jun. +
2-4-carpellate +
oblong-obovoid +  and obovoid +
greenish white +  and white +
distinct +
crested;not keeled;ovate-triangular +
opposite +  and subopposite +
Introduced +
4 +  and 5 +
2 +  and 4 +
Rhamnus alaternus +
species +
600 cm6,000 mm <br />6 m <br /> (1,000 cm10,000 mm <br />10 m <br />) +
deciduous +  and evergreen +
spreading +  and erect +
polygamous +, dioecious +  and synoecious +