Frangula obovata

(Kearney & Peebles) G. L. Nesom & J. O. Sawyer

Phytologia 91: 302. 2009.

Common names: Pearleaf buckthorn
Endemic
Basionym: Rhamnus betulifolia var. obovata Kearney & Peebles J. Wash. Acad. Sci. 29: 486. 1939
Synonyms: Frangula betulifolia subsp. obovata (Kearney & Peebles) Kartesz & Gandhi
Treatment appears in FNA Volume 12. Treatment on page 58. Mentioned on page 52, 53.

Shrubs, 1–2.5 m. Stems red to brown or gray-brown, glabrous or pubescent. Leaves deciduous; petiole 5–14 mm; blade usually equally green on both surfaces, not glaucous, obovate to oblong-obovate or oblong, (4–)5–9 × 3.2–6 cm, 1.2–1.8(–2.5) times longer than wide, subcoriaceous to distinctly coriaceous, base truncate to subcordate, margins serrulate to nearly entire, apex obtuse to truncate or rounded, both surfaces minutely puberulous to hirtellous, glabrescent; secondary veins (5–)6–8(–9) pairs. Inflorescences umbels, pedunculate, 2–12-flowered. Pedicels 3–10 mm. Stigmas 3-lobed. Drupes black, globose, 5–8 mm; stones 3.


Phenology: Flowering Apr–Jun.
Habitat: Hanging gardens, cliff faces, talus, canyon bottoms, seepage below cliffs, stream and creek banks.
Elevation: 1300–2400 m.

Discussion

Frangula obovata is known from Clark County, Nevada, across northern Arizona and southern Utah to southwestern Colorado; its distribution does not overlap that of F. betulifolia.

Selected References

None.

Lower Taxa

None.
... more about "Frangula obovata"
John O. Sawyer† +  and Guy L. Nesom +
(Kearney & Peebles) G. L. Nesom & J. O. Sawyer +
Rhamnus betulifolia var. obovata +
Pearleaf buckthorn +
Ariz. +, Colo. +, Nev. +  and Utah. +
1300–2400 m. +
Hanging gardens, cliff faces, talus, canyon bottoms, seepage below cliffs, stream and creek banks. +
Flowering Apr–Jun. +
Frangula betulifolia subsp. obovata +
Frangula obovata +
Frangula +
species +