Ceanothus
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Exposure: | ☼ | ?"?" is not in the list (sun, part-sun, shade, unknown) of allowed values for the "Exposure" property. |
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Water: | ◍ | ?"?" is not in the list (wet, moist, moderate, dry, less when dormant) of allowed values for the "Water" property. |
Read about Ceanothus in the Standard Cyclopedia of Horticulture
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Ceanothus (ancient Greek name). Rhamnaceae. Ornamental woody plants grown for their profusely produced white, blue or pink flower-clusters. Deciduous or evergreen shrubs or trees: lvs. alternate or sometimes opposite, short-petioled. serrate or entire, usually 3 - nerved, with small stipules: fls. perfect, small. 5-merous, in small umbels forming panicles or racemes; sepals often incurved, colored; petals clawed, spreading or recurved; filaments slender; disk annular; ovary partly adnate to the calyx-tube, 3-celled; style 3-cleft: fr. a 3-celled drupe, dry at length and separating into 3 one- seeded dehiscent nutlets.— Nearly 50 species in N. Amer., chiefly in the Pacific coast region. These are free-flowering shrubs, some especially valuable for their late flowering period. Many of them are hardy only in the warmer temperate regions, but C. americanus, C. ovatus, and C. Fendleri are hardy North, while the numerous hybrids of C. americanus are only half hardy, and even if protected they are killed to the ground in the North, but the young shoots will usually flower the same season. The safest way, however, to have good free-flowering plants of these beautiful hybrids will be, in the North, to dig them up in fall, store them away in a frost-proof pit or cellar, and plant them out again in spring. Pruning of the late-flowering species will be of advantage; about one-half of last year's growth may be taken away. They grow in almost any soil, but best in a light and well-drained one, and most of the Californian species prefer a sunny position. Propagated by seeds sown in spring and by cuttings of mature wood in autumn, inserted in a cold- frame or greenhouse; softwood cuttings also grow readily if taken in early spring from forced plants. Sometimes increased by layers, and the varieties and hybrids by grafting on roots of C. americanus under glass in early spring; the cions must be fresh and with leaves, taken from plants kept in the greenhouse during the winter.CH
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Cultivation
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Propagation
Propagation of Ceanothus is by seed, following scarification and stratification. Seeds are soaked in water for 12 hours followed by chilling at 1 °C for one to three months. It can also sprout from roots and/or stems [2]. Seeds are stored in duff in large quantities. It is estimated that there are about two million seeds per acre in forest habitats [3]. Seed are dispersed propulsively from capsules and, it has been estimated, can remain viable for about a hundred yearswp.
Pests and diseases
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Species
- Selected specieswp
- Ceanothus americanus L. - New Jersey Tea; Red Root
- Ceanothus arboreus Greene - Feltleaf Ceanothus
- Ceanothus confusus J.T. Howell - Rincon Ridge Ceanothus
- Ceanothus connivens Greene - Trailing Buckbrush
- Ceanothus cordulatus Kellogg - Whitethorn Ceanothus
- Ceanothus crassifolius Torr. - Hoaryleaf Ceanothus
- Ceanothus cuneatus (Hook.) Nutt. - Buckbrush
- Ceanothus cuneatus var. fascicularis (McMinn) - Hoover Sedgeleaf Buckbrush
- Ceanothus cuneatus var. rigidus (Nutt.) Hoover - Monterey Ceanothus
- Ceanothus cyaneus Eastw. - San Diego Buckbrush
- Ceanothus dentatus Torr. & Gray - Sandscrub Ceanothus
- Ceanothus divergens Parry - Calistoga Ceanothus
- Ceanothus diversifolius Kellogg - Pinemat
- Ceanothus fendleri Gray - Fendler's Ceanothus
- Ceanothus ferrisiae McMinn - Coyote Ceanothus
- Ceanothus foliosus Parry - Wavyleaf Ceanothus
- Ceanothus foliosus var. foliosus - Wavyleaf Ceanothus
- Ceanothus foliosus var. medius McMinn - Wavyleaf Ceanothus
- Ceanothus foliosus var. vineatus McMinn - Vine Hill Ceanothus
- Ceanothus fresnensis Dudley ex Abrams - Fresno Ceanothus
- Ceanothus gloriosus J.T. Howell - Point Reyes Ceanothus
- Ceanothus gloriosus var. exaltatus J.T. Howell - Point Reyes Ceanothus
- Ceanothus gloriosus var. gloriosus - Point Reyes Ceanothus
- Ceanothus gloriosus var. porrectus J.T. Howell - Mt. Vision Ceanothus
- Ceanothus greggii Gray - Desert Ceanothus
- Ceanothus greggii var. greggii - Desert Ceanothus
- Ceanothus greggii var. perplexans (Trel.) Jepson - Desert Ceanothus
- Ceanothus greggii var. vestitus (Greene) McMinn - Mojave Ceanothus
- Ceanothus griseus (Trel. ex B.L. Robins.) McMinn - Carmel Ceanothus
- Ceanothus hearstiorum Hoover & J.B. Roof - Hearst Ranch Buckbrush
- Ceanothus herbaceus Raf. - Jersey Tea
- Ceanothus impressus Trel. - Santa Barbara Ceanothus
- Ceanothus impressus var. impressus - Santa Barbara Ceanothus
- Ceanothus impressus var. nipomensis McMinn - Santa Barbara Ceanothus
- Ceanothus incanus Torr. & Gray - Coast Whitethorn
- Ceanothus integerrimus Hook. & Arn. - Deerbrush Ceanothus
- Ceanothus jepsonii Greene - Jepson Ceanothus
- Ceanothus jepsonii var. albiflorus J.T. Howell - Jepson Ceanothus
- Ceanothus jepsonii var. jepsonii - Jepson Ceanothus
- Ceanothus lemmonii Parry - Lemmon's Ceanothus
- Ceanothus leucodermis Greene - Chaparral Whitethorn
- Ceanothus maritimus Hoover - Maritime Ceanothus
- Ceanothus martinii M.E. Jones - Martin's Ceanothus
- Ceanothus masonii McMinn - Mason's Ceanothus
- Ceanothus megacarpus Nutt. - Bigpod Ceanothus
- Ceanothus megacarpus var. insularis (Eastw.) Munz - Island Ceanothus
- Ceanothus megacarpus var. megacarpus - Bigpod Ceanothus
- Ceanothus microphyllus Michx. - Littleleaf Buckbrush
- Ceanothus oliganthus Nutt. - Hairy Ceanothus
- Ceanothus ophiochilus Boyd, Ross & Arnseth - Vail Lake Ceanothus
- Ceanothus palmeri Trel. - Palmer Ceanothus
- Ceanothus papillosus Torr. & Gray - Wartleaf Ceanothus
- Ceanothus papillosus var. papillosus - Wartleaf Ceanothus
- Ceanothus papillosus var. roweanus McMinn - Wartleaf Ceanothus
- Ceanothus parryi Trel. - Parry Ceanothus
- Ceanothus parvifolius (S. Wats.) Trel. - Littleleaf Ceanothus
- Ceanothus pinetorum Coville - Coville Ceanothus
- Ceanothus prostratus Benth. - Prostrate Ceanothus
- Ceanothus pumilus Greene - Dwarf Ceanothus
- Ceanothus purpureus Jepson - Hollyleaf Ceanothus
- Ceanothus roderickii Knight - Pine Hill Buckbrush
- Ceanothus sanguineus Pursh - Redstem Ceanothus
- Ceanothus serpyllifolius Nutt. - Coastal Plain Buckbrush
- Ceanothus sonomensis J.T. Howell - Sonoma Ceanothus
- Ceanothus sorediatus Hook. & Arn. - Jimbrush Ceanothus
- Ceanothus spinosus Green Bark Ceanothus
- Ceanothus thyrsiflorus Eschsch. - Blueblossom
- Ceanothus tomentosus Parry - Woolyleaf Ceanothus
- Ceanothus velutinus Dougl. ex Hook. - Snowbrush Ceanothus
- Ceanothus velutinus var. hookeri M.C. Johnston - Hooker's Ceanothus
- Ceanothus velutinus var. velutinus - Snowbrush Ceanothus
- Ceanothus verrucosus Nutt. - Barranca Brush
Read about Ceanothus in the Standard Cyclopedia of Horticulture
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C. africanus, Linn. (syn.Noltea Africana).―C. dentatus, Torr.& Gray. Low shrub:lvs. oblong, penninerved, dentate, glandular-papillate above, loosely hairy: fls. Blue, in peduncled clusters. Calif. F.S. 6:567. 2. B.H. 3:101.―C. dentatus var. floribundus, Trel. (C. floribundus, Hook.). Fl-clusters numerous, nearly sessile: lvs. smaller. B.M. 4806. F.S. 10:977. I.H. 7:238. B.H. 5:129.—C. foliosus, Parry. Low shrub: lvs. small, broadly elliptic, glandular-toothed, slightly hairy, pale or glaucous beneath: fls. deep blue, in numerous small clusters. Calif.—C. laevigatus, Douglas. Tall shrub: lvs. broadly elliptic, serrate, glabrous, glaucous beneath: fls. yellowish white, in large panicles. Calif.—C. microphyllus, Michx. Low shrub: lvs. very small, obovate or elliptic, nearly glabrous: fls. white, in small, short-peduncled clusters.—C. papillosus, Torr. & Gray. Low shrub: lvs. narrow-oblong, dentate, glandular-papillate above, villous beneath: fls. deep blue, in peduncled, axillary oblong clusters. Calif. B.M. 4815. F.S. 6:567, 1. P.F.G. 1, p. 74 R.H. 1850:321.—C. Parryi, Trel. Large shrub: lvs. elliptic or ovate, denticulate, cobwebby beneath: fls. deep blue, in peduncled, narrow panicles. Calif.—C. rigidus, Nutt. Rigid, much-branched shrub: lvs. opposite, cuneate-obovate, denticulate, usually glabrous, small: fls. blue, in small, nearly sessile, axillary clusters. Calif. B.M. 4660 (as C. verrucosus) and 4664. J.F. 3:316; 4:348.—C. verrucosus, Nutt. Low shrub: lvs. mostly alternate, roundish obovate, emarginated, denticulate, nearly glabrous, small: fls. white, in small, axillary clusters along the branches, Calif.—C. verrucosus, Hook.(syn. C. rigidus.CH
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Gallery
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References
- Standard Cyclopedia of Horticulture, by L. H. Bailey, MacMillan Co., 1963
External links
- w:Ceanothus. Some of the material on this page may be from Wikipedia, under the Creative Commons license.
- Ceanothus QR Code (Size 50, 100, 200, 500)