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|Jepson eFlora: Taxon page
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|Family: Rhamnaceae||View Description||Dichotomous Key|
|Genus: Ceanothus||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Ceanothus rigidus Nutt.
Habit: Plant mound-like to +- erect, dense, < 1.5 m. Stem: erect to spreading, not rooting at nodes; twigs generally not angled, brown to gray-brown. Leaf: opposite, evergreen; stipules knob-like; petiole < 2 mm; blade 4--10 mm, 4--6 mm wide, length generally < 2 × width, widely obovate to round, adaxially generally shiny, dark green, glabrous, abaxially paler, short-strigose or puberulent, tip rounded to truncate, margin generally not thick, generally not rolled under, entire or teeth generally 5--9, sharp. Inflorescence: umbel-like, 0.5--2 cm. Flower: blue to lavender (white). Fruit: 4--6 mm wide, +- smooth; horns smooth, < 1 mm. Chromosomes: 2n=24.
Ecology: Sandy substrates, chaparral, closed-cone-pine forest; Elevation: < 400 m. Bioregional Distribution: CCo. Flowering Time: Mar--May Note: Were they to be recognized taxonomically, mound-like plants with white flowers would be assignable to Ceanothus rigidus var. albus Roof.
Synonyms: Ceanothus cuneatus (Hook.) Nutt. var. rigidus (Nutt.) Hoover
eFlora Treatment Author: Dieter H. Wilken
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory
Previous taxon: Ceanothus purpureus
Next taxon: Ceanothus roderickii
Citation for this treatment: Dieter H. Wilken 2016. Ceanothus rigidus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=18436, accessed on September 29, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on September 29, 2016.