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FNA | Family List | FNA Vol. 12 | Rhamnaceae

17. Ceanothus tomentosus Parry, Proc. Davenport Acad. Nat. Sci. 5: 190. 1889.

Shrubs, evergreen, 1.5–2.5 m. Stems erect, rarely spreading, not rooting at nodes; branchlets reddish brown, not thorn-tipped, round in cross section, flexible, tomentulose, glabrescent. Leaves: petiole 1–4 mm; blade flat, ovate to widely elliptic, 10–25 × 5–12 mm, base obtuse to rounded, margins serrulate to denticulate most of length, not revolute, teeth 39–71, apex obtuse, abaxial surface light or gray-green, tomentose to tomentulose, adaxial surface dark green, villosulous or puberulent, glabrescent; usually 3-veined from base, rarely pinnately veined (veins sometimes obscured by indumentum). Inflorescences axillary or terminal, racemelike or paniclelike, 2–6 cm. Flowers: sepals, petals, and nectary usually deep blue, sometimes pale blue. Capsules 3–4 mm wide, slightly lobed at apex; valves smooth, viscid when young, crested.

Varieties 2 (2 in the flora): California, nw Mexico.

1 Leaf blade abaxial surfaces uniformly and densely tomentulose, veins obscured; c Sierra Nevada, California.   17a Ceanothus tomentosus var. tomentosus
+ Leaf blade abaxial surfaces sparsely to moderately tomentulose, veins ± evident; s California.   17b Ceanothus tomentosus var. olivaceus

Lower Taxa


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