Rhamnus davurica |
Rhamnus alaternus |
|
---|---|---|
Dahurian buckthorn |
evergreen buckthorn, Italian buckhorn, Italian buckthorn |
|
Habit | 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 ovate-lanceolate, 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. |
|
Drupes | dark red, becoming black, globose, 5–7 mm; stones 3. |
|
Sepals | 5. |
|
Petals | 0. |
|
Rhamnus davurica |
Rhamnus alaternus |
|
Phenology | Flowering (Feb–)Mar–Jun. | |
Habitat | Woodland edges, fencerows, low areas, stream banks, canyons, arroyos. | |
Elevation | 0–400 m. (0–1300 ft.) | |
Distribution |
CT; DE; IA; IL; KY; MD; MI; MO; NC; ND; NE; NJ; NY; OH; PA; RI; SD; TN; VA; Asia [Introduced in North America]
|
CA; Europe [Introduced in North America; introduced also in Pacific Islands (New Zealand), Australia] |
Discussion | Subspecies 2 (1 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 12, p. 50. | FNA vol. 12, p. 50. |
Parent taxa | Rhamnaceae > Rhamnus | Rhamnaceae > Rhamnus |
Sibling taxa | ||
Subordinate taxa | ||
Name authority | Pallas: Reise Russ. Reich. 3: 721. (1776) — (as davuricus) | Linnaeus: Sp. Pl. 1: 193. (1753) |
Web links |