Flora vacations #1

Looking down into Cape Town from the top of Table Mountain, Lions head off to the left

Since it’s the time of year to get together with family, I thought I would post a “holiday”post about the flora of my home town – Cape Town.  The Cape Floristic region is world-renowned for its unique and fascinating flora.

Pincushion (Leucospermum conocarpodendron) framing the walk up to the mountain

Pincushion (Leucospermum conocarpodendron) framing the walk up to the mountain

Elegia capensis – Restionaceae

A Mediterranean ecosystem that is frequently compared to that of California, Australia and, of course the Mediterranean, it has its own set of unique species that are adapted to its acid soils and winter rainfall.  It is indeed so special, with 8200 species in an area 1/3 the size of Britain, that in 2004 it was declared a World Heritage Site.  One of the gems in the crown is Kirstenbosch gardens.  Situated on the back slopes of Table Mountain this garden displays many of the unique and beautiful species found in Fynbos and in other flora of South Africa.  Many of these species are popular, not only locally, but around the world and have been developed for horticulture.  As a site with multiple uses, providing access to mountain walks, acting as a music and art venue, Kirstenbosch is popular with locals and tourists alike.When walking on Table Mountain there are many extraordinary plants to see.  Families that are common in Fynbos and relatively rare globally are Proteaceae,

Mimetes hirtus

Helichrysum vestitum (Asteraceae)

and Restionaceae.  Unique genera of the Proteaceae, such as Grevillea sp., are also found in Australia.

Ubiquitous families like the daisies (Asteraceae) are well represented too.  Pictured here is an example of the group known as “Everlastings”, the ray florets of this group have a papery texture and dry very well making them popular with florists.

Disa uniflora

Herschelia graminifolia – blue disa

Even the more delicate gems of the plant world can be found here.  It is quite possible that climbing on the mountain in summer or winter you might come across members of the family Orchidaceae.    Many of the species such as Disa uniflora are well-known by enthusiasts around the world and bred with great care.

Everlastings and Leucodendron sp. on the mountains of the Cape Peninsula

The diversity of species and form is connected to the dynamic patchwork of soil, water and light conditions that are found in the mountains and plains of the region.   Trees of the temperate forests line the Kloofs, while grasses and shrubs vie for space on sandy flats, and a successional array of bulbs, forbs and shrubs are to be found all over the micro climates of the mountains.

Evidence of fire on the Cape Peninsula mountains

But all the species that are found in this dynamic landscape have to be able to cope with fire. Fire is a transformative element in the landscape patchwork and plants are able to survive by employing different strategies.  Some plants produce myriads of seeds holding them in protective structures until the fire has passed.  The fire stimulates the release of seed of these serotinous individuals and the smoke of the fire stimulates seed germination.  Another strategy is to protect the meristematic buds beneath the surface of the soil and resprout after fire., taking advantage of a nutrient rich environment with few competitors.

It is interesting that many of the remarkable species of this landscape have been developed for horticulture and utilized around the world in gardens.  In agriculture species, such as corn or the apple, have not appeared desirable at first and have been worked for centuries to obtain the suite of appealing characters that we now enjoy.  It makes me wonder what inconspicuous species lie in wait in the many different flora around the world, waiting for some creative enthusiast to spot their inherent beauty and potential.

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Changing forests

Wildfires are an important topic in summer, raising awareness with regard to land management and fire as a tool.

http://www.npr.org/blogs/pictureshow/2012/08/23/159614784/our-changing-forests-an-88-year-time-lapse

This article has some intriguing photo’s, taken over an 88 year period, that give a sense of the fuel load changing in response to land management practices.

One of the hardest things I find in working with landscapes is imagining the transformation, intended and unintended.  A landscape “What if?”, if you will.  While we delight in the colors of annuals and biennials it is the large perennials that give our landscapes form.  Thus, reminders of how any landscape, wild or tamed, alters through time is always helpful in sparking the imagination, adding another dimension to informed plant selection.