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Results tagged “february-05”

Feb 5, 2015: Viburnum tinus subsp. rigidum

Another entry written by Tamara Bonnemaison today. She writes:

The late James Gaither (aka JG in SF@Flickr) captured these two stages of Viburnum tinus subsp. rigidum, first in flower and then in fruit, at the UC Berkeley Botanical Garden. We are so grateful for the amazing collection of botanical photography that James Gaither has left for all of us to enjoy -- please do visit his Flickr site.

Viburnums have been featured many times on Botany Photo of the Day, including Viburnum betulifolium, Viburnum rhytidophyllum, Viburnum lantanoides, and Viburnum × bodnantense. It is no wonder the staff at BPotD are fond of viburnums. The shrubs and small trees of this genus are native to the temperate Northern Hemisphere, and many are commonly used in the gardens and landscapes of British Columbia and around the temperate world. The viburnums are loved by gardeners for their showy and often scented flowers, bright berries, and fall colour. The genus is quite variable, and one of the few characteristics shared by all members is that the fruits are drupes (stone fruit). Another characteristic that applies to nearly all viburnums is that they are reluctant to self-pollinate, so multiple plants of the same species (ideally not of the same clonal stock) should be planted in order to get a good fruit set.

Viburnum tinus is an excellent garden ornamental. It has an upright, oval to rounded form, and its evergreen leaves grow right down to the edge of the ground, making it particularly useful as a screen or hedge. The common name for this species, laurustinus, comes from its lustrous, laurel-like dark green leaves, which are complemented by pink buds that open to white, slightly fragrant flowers in winter. These flowers mature to the stunning black, metallic fruits shown in today's second photo. Laurustinus is quite easy to grow, being adaptable to most soil types and tolerant of full sun, salt spray, shade, and drought. Viburnum tinus is native to southern Europe, but the subspecies rigidum hails from the Canary Islands. I could not find a habit photo of the subspecies, but a lovely photo of Viburnum tinus growing wild in Sardinia was photographed by Gino Cherchi: Viburnum tinus.

Laurustinus may have some medicinal qualities; I found some sources that discussed its potential as a treatment for menstrual cramps, but cannot validate its efficacy (the same sources also said the berries could be toxic, so please don't try this out!). The most enthusiastic source of medical information about the viburnum genus is the 9th Edition of the Journal of Materia Medica, published in the 19th century. This source raves of the compound viburnin that the "Eclectic Physician" used to treat an array of diseases. This substance was derived from the bark of the high cranberry (Viburnum opulus), but is potentially also found in other species of Viburnum. Much more recently, the author of the blog Naturally Dyeing has used laurustinus to dye fabric (read about her attempts).

Feb 5, 2012: Triphysaria eriantha

Triphysaria eriantha

Another member of the broomrape family today, Triphysaria eriantha is known commonly as Johnnytuck or butter and eggs. These annual plants can be found throughout most of California and parts of southwest Oregon. Calphotos has additional images, including photographs of the plants in habitat: Triphysaria eriantha.

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