Berberis piperiana

(Abrams) McMinn

Man. Calif. Shrubs, 125. 1939.

EndemicIllustrated
Basionym: Mahonia piperiana Abrams Phytologia 1: 91. 1934
Treatment appears in FNA Volume 3.

Shrubs, evergreen, 0.3-0.8 m. Stems monomorphic, without short axillary shoots. Bark of 2d-year stems brown or purple, glabrous. Bud-scales 3-8 mm, deciduous. Spines absent. Leaves 5-9-foliolate; petioles 1-6 cm. Leaflet blades rather thick and ± rigid; surfaces abaxially dull, papillose, adaxially glossy, green; terminal leaflet stalked, blade 3.6-9.5 × 2-5.2 cm, 1.3-2.1 times as long as wide; lateral leaflet blades lance-elliptic to elliptic-ovate or narrowly oblong, 1 (-3) -veined from base, base rounded to obtuse or truncate, margins undulate, toothed, each with 6-12 teeth 1-4 mm, tipped with spines to 1.6-2.8 × 0.2-0.3 mm, apex acute to rounded-obtuse. Inflorescences racemose, dense, 25-60-flowered, 3-10 cm; bracteoles membranous, apex obtuse or rounded. Flowers: anther-filaments with distal pair of recurved lateral teeth. Berries dark blue and glaucous, oblong-ovoid, 7-10 mm, juicy, solid. 2n = 28.


Phenology: Flowering winter–spring (Mar–Jun).
Habitat: Open wooded and shrubby slopes
Elevation: 900-1700 m

Discussion

Berberis piperiana is resistant to infection by Puccinia graminis.

Selected References

None.

Lower Taxa

None.

"thick" is not a number.

... more about "Berberis piperiana"
Alan T. Whittemore +
(Abrams) McMinn +
purple +  and brown +
rounded;obtuse or truncate +
Mahonia piperiana +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
3.6 cm36 mm <br />0.036 m <br /> (9.5 cm95 mm <br />0.095 m <br />) +
obovate +, oblanceolate +  and elliptic +
1.2 cm12 mm <br />0.012 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
2cm;5.2cm +
scale-like +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Calif. +  and Oreg. +
900-1700 m +
small +  and large +
showy +  and inconspicuous +
0.3 cm3 mm <br />0.003 m <br /> (?) +  and 0.8 cm8 mm <br />0.008 m <br /> (?) +
compound +  and simple +
spheric +  and cylindric-ovoid or ellipsoid +
Open wooded and shrubby slopes +
axillary +  and terminal +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
5-9-foliolate +
reduced +
toothed;undulate +
1-carpellate +
basal +  and superior +
club--shaped +
3-merous +  and 2-merous +
nectariferous +
distinct +
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
Flowering winter–spring (Mar–Jun). +
Man. Calif. Shrubs, +
not nodose +
1 +  and 10 +
distinct +
elongate +
Endemic +  and Illustrated +
1.6mm;2.8mm +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
elongating +
monomorphic +
with elongate primary-stems and short axillary spur shoots +  and elongate +
palmate +  and pinnate +
persistent +
glossy +  and dull +
papillose +
Odostemon +
Berberis piperiana +
Berberis +
species +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
glabrous +  and with tomentose stems +