Berberis trifoliolata
Berberis dictyota
agarito, agritos, algerita, currant-of-Texas
shining netvein barberry
of 2d-year stems gray or grayish purple, glabrous.
of 2d-year stems brown or purple, glabrous.
3-foliolate;
petioles 0.8-5.4 cm.
5-7-foliolate;
petioles 0.5-3 cm.
blades thick and rigid;
surfaces abaxially dull, papillose, adaxially dull, ± glaucous;
terminal leaflet sessile, blade 2.3-5.8 × 0.9-2 cm, 1.6-3.1 times as long as wide;
lateral leaflet blades narrowly lanceolate or narrowly elliptic, 1-veined from base, base acute or acuminate, rarely rounded-acute, margins plane, toothed or lobed, with 1-3 teeth or lobes 3-7 mm high tipped with spines to 1-2 × 0.2-0.3 mm, apex narrowly acute or acuminate.
blades thick and rigid;
surfaces abaxially dull, papillose, adaxially dull, glaucous;
terminal leaflet stalked, rarely sessile in a few leaves, blades 2.2-8.8 × 1.8-6 cm, 1.2-2 times as long as wide;
lateral leaflet blades elliptic to oblong or oblong-ovate, 1-3-veined from base, base obtuse or truncate, margins strongly crispate, toothed, each with 3-8 teeth 2-8 mm tipped with spines to 2-4.8 × 0.4-0.6 mm, apex rounded or obtuse.
absent.
absent.
racemose, lax, 1-8-flowered, 0.5-3 cm;
bracteoles membranous, apex acuminate.
racemose, dense, 25-50-flowered, 3-7 cm;
bracteoles membranous, apex rounded or obtuse.
anther filaments without distal pair of recurved lateral teeth.
anther filaments with distal pair of recurved lateral teeth.
red, sometimes glaucous, spheric, 6-11 mm, juicy, solid.
dark blue, at least sometimes glaucous, oblong-ovoid, 6-7 mm, juicy, solid.
scales 2-3 mm, deciduous.
scales 3-5 mm, deciduous.
= 28.
Berberis trifoliolata
Berberis dictyota
The illegitimate name Berberis trifoliolata Moricand var. glauca (I. M. Johnston) M. C. Johnston has been used for plants with very strongly glaucous leaves. Weakly and strongly glaucous plants are often found in the same population, however, indicating that they are not distinct varieties.
Berberis trifoliolata is susceptible to infection by Puccinia graminis.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Berberis dictyota, B. amplectens, B. pumila, and B. wilcoxii are very similar, and the characters that separate them (height, glossiness and crispation of leaflets, and size and number of marginal teeth) are rather variable within the species. Berberis piperiana also belongs to this group, although it is usually more distinct because of its thinner leaflets with more slender, more numerous marginal spines.
Berberis dictyota is resistant to infection by Puccinia graminis.
Medicinally, the Kawaiisu used a decoction of the root of Berberis dictyota to treat gonorrhea (D. E. Moermann 1986).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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