12
Jun
2009
Ceanothus thyrsiflorus
Trees and shrubs | Magnoliopsida
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Scientific name - Ceanothus thyrsiflorus

Synonyms --

Popular names - blue-blossom, bluebrush, blue-Myrtle, Californian-lilac, céanothe thyrsiflore, Lilas Bleu de Californie.

Distribution and Habitat - originating in North America, California, dominates the coastal areas up to 600 m altitude.

Description - shrub or small tree, evergreen, 1-4 m high. Prostrata strain or upward. Green stalk, glabra, thin, flexible, geniculati. Leaves 2-6 cm long, oblong-elliptic, top obtuse or acute, margin fine teeth 3 ribs prominent upper front glabra, 12-15 mm long stalks. Panic blossom simple or compound, 4-8 cm long, peduncle elongate, flowers pale to dark blue, rarely white. Blooms in April-June. Capsule 3 mm wide, U.S.or lobate, smooth. Pollination made by bees, Apis sp ..

Growth rate - in the first year increases quickly, then increase slowly.

Tolerances - drought, heat, salinity and sandy soils, neutral or slightly alkaline. It tolerates low soil drainage and very wet.

Requirements - soil well-drained, fertile, sunny.

Management - is easy transplanteaza late autumn or spring. It is clipped in April to maintain a compact crown.

Propagation - by seeds or seedlings. Fresh seeds give better results than those stored a year or two. The stored should laminated, or applied to water treatment ͦ 82-93 C for 24 hours.

Potting-up is done with cuttings from new growth semilignificati. Green seedlings, shoots may be attacked by fungi. Lignificati rooted cuttings difficult.

Diseases and pests - Chrysesobothris Mali Synanthedon resplendens.

Natural partners and Garden - Arctostaphylos sp., Cercis orbiculata, Clematis sp., Eriodictyon californicum, Marah fabaceus, Rhamnus californica, Toxicodendron diversilobum.

Cultivars and varieties - 'Millerton Point' with glossy foliage and white flowers, introduced in 1970 by Saratoga Horticultural Foundation.

'Victoria' with dark blue flowers, oval leaves, dark green, grows well in full sun, dry soils, are clipped early spring to maintain compact crown.

'Skylark' with dark green leaves and blue flowers, stand up to temperatures of -10 C. ͦ

'Snow flurry' - cultivar selected by Joseph Solomon, white flowers.

C. thyrsiflorus var. repens - prostrate form.

C. x pallidus 'Marie Simon' - grows up to 1.5 m high, pale pink flowers in terminal panicule.

C. x delilianus 'Henri Desfosse' - deciduu, dark blue flowers, blooming all summer.

Properties and Uses - species used for ornamental fencing you, or on trellises.

Myth, Legendand Folklore - people originating in North America were the first to use Ceanothus. Young and flexible stems are used for production of pimples, and the leaves and roots for medicinal purposes.

Ceanothus americanus species of Ceanothus was first introduced in Europe in 1713.

Ceanothus thyrsiflorus, was the first species in California that has received recognition botany and horticulture.

References

David Fross, Dieter Wilken - Ceanothus - Timber Press, 2006

Jacqueline Herit - Complete Trees, Shrubs & Hedges - Creative Homeowner, 2005

Leroy Abrams - Illustrated Flora of the Pacific States - Stanford University Press, 1951

Linda Beidleman, Eugene Kozloff - Plants of the San Francisco Bay Region - University of California Press, 2003

Nevin Smith - Native Treasures - Gardening With the Plants of California - University of California Press, 2006

Ronald D. Quinn, Sterling C. Keeley, Marianne D. Wallace - Introduction to California Chaparral - University of California Press, 2006

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