Rhamnus serrata

Humboldt & Bonpland ex Willdenow

in J. J. Roemer et al., Syst. Veg. 5: 295. 1819.

Common names: Sawleaf buckthorn
Synonyms: Rhamnus fasciculata Greene R. serrata var. guatemalensis L. A. Johnson R. smithii subsp. fasciculata (Greene) C. B. Wolf
Treatment appears in FNA Volume 12. Treatment on page 49. Mentioned on page 46.

Shrubs to small trees, 0.8–2.5 m, unarmed. Branchlets gray-brown, 2 cm, puberulent, glabrescent. Bud scales dark red to reddish brown, coriaceous, dull. Leaves 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. Pedicels 1–4 mm. Sepals 4. Petals 4. Drupes black, globose or slightly elongate, 4–6(–8) mm; stones 2.


Phenology: Flowering Apr–Jun.
Habitat: Canyons, stream banks, open hillsides, ledges, ridges, among boulders, gravelly limestone hills, roadsides, mesic forests, woodlands.
Elevation: 1500–2600 m.

Distribution

V12 938-distribution-map.jpg

Ariz., N.Mex., Tex., Mexico, Central America (Guatemala).

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Rhamnus serrata"
Guy L. Nesom +  and John O. Sawyer† +
Humboldt & Bonpland ex Willdenow +
Sawleaf buckthorn +
Ariz. +, N.Mex. +, Tex. +, Mexico +  and Central America (Guatemala). +
1500–2600 m. +
Canyons, stream banks, open hillsides, ledges, ridges, among boulders, gravelly limestone hills, roadsides, mesic forests, woodlands. +
Flowering Apr–Jun. +
in J. J. Roemer et al., Syst. Veg. +
Rhamnus fasciculata +, R. serrata var. guatemalensis +  and R. smithii subsp. fasciculata +
Rhamnus serrata +
species +