My Acacia 'karroo'

My Acacia Karroo (Soetdoring - Vachellia karoo) after the Springs rains October 2009
- Camera : FujiFinepix 2800Zoom

My thorn trees (Acacia) are just coming into bloom and for those that suffer from hay-fever, this is really a bad time of the year, especially if we haven't had much rain. Spring started off very dry, and we have only had some decent rain late in November this year.

During Winter I'm able to prune the tree's low-hanging branches a bit and I just love keeping some of the branches with the HUGE thorns for display around the house - they become quite a conversation piece!

This is one of South Africa's most beautiful and useful trees. It is integrally part of our country's history having been used for everything from raft-making to sewing needles and fencing for the houses of the royal Zulu women. The thorns were even used by early naturalists to pin the insects they collected! It is very widespread throughout southern Africa and there are different forms in some places, which can be confusing. Acacia karroo may be found from the Western Cape through to Zambia and Angola. In tropical Africa it is replaced by Acacia seyal. The name Acacia is derived from Greek "akis" a point or barb. Karroo is one of the old spellings of karoo which cannot be corrected because of the laws governing botanical nomenclature (giving of names).

The sweet thorn makes a beautiful garden specimen. The bright yellow flowers look very striking against the dark green foliage. The rough, dark brown bark is also most attractive. The flowers are sweetly scented and are renowned for attracting insects which are essential to any bird garden. Birds also like to make nests in thorn trees as the thorns offer them some protection from predators. These thorns can grow up to 6" (15cm) long and if they are very thick, it's an indication of an abundance of water. Caterpillars of 10 species of butterflies are dependant on the tree for survival. These include, the club-tailed charaxes (Charaxes zoolina zoolina) and the topaz-spotted blue (Azanus jesous). In cold and dry areas like where I live, the tree is deciduous.

Regions where the Acacia Karroo can be found - I can be found approx. where the red dot is at the bottom of Southern Africa. (Click on pic to enlarge)

Vachellia karoo - Acacia 'karroo' flowers" Watercolour sketch - Maree©

Acacia karroo also known as the Sweet Thorn (Vachellia karoo), is a species of Acacia, and the tree is especially useful as forage and fodder for domestic and wild animals. Apparently, there is no risk of poisoning from it. Goats seem to like A. karoo better than cattle. The flowers appear in early summer in a mass of yellow pompons and make a very good source of forage for honey bees; honey from it has a pleasant taste.

An edible gum seeps from cracks in the tree's bark. The gum can be used to manufacture candy and it used to have economic importance as "Cape Gum". In dry areas, the tree's presence is a sign of water, both above and underground.

It is a tree of open woodland and wooded grassland. It grows to its greatest size when rainfall of 800-900mm is received but can grow and even thrive in very dry conditions such as the Karroo region of western South Africa. The requirement here is for deep soils that allow its roots to spread. Everywhere in its range, however, the tree is easily recognised by its distinctive long white paired thorns and coffee coloured bark, both of which are very attractive. In the tropics it shows little variation but at the southern end of its range it becomes more variable in appearance.

Common names in various languages include Karoo Thorn, Doringboom, Cape Gum, Cassie, Piquants Blancs, Cassie Piquants Blancs, Cockspur Thorn, Deo-Babool, Doorn Boom, Kaludai, Kikar, Mormati, Pahari Kikar, and Udai Vel

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The Hedgehog's Future

NEW HORIZONS

What will be the future for hedgehogs as the countryside changes at such an amazing rate? We can only guess, of course, but some changes can only be for the worse as far as hedgehogs are concerned.

Farmlands are not popular with hedgehogs. Insects are controlled by pesticides, so food is short. And there are few trees, meaning that there is little nesting material, and the open fields hold few nesting sites.

The conversion of pasture to arable land means that crops will be sprayed with chemicals, which destroy insects, slugs and worms, the main parts of the hedgehog's diet. And the grubbing-up of hedges and clearance of small patches of waste ground will destroy many good sites for hedgehog hibernation nests.

But as long as hedgehogs prosper in gardens and suburbs, the future isn't entirely bleak!
Info from "Everything You Want To Know about Hedgehogs - Dilys Breese"

Rhus lancea (Swart Karee)

People in suburbia see trees differently than foresters do. They cherish every one. It is useless to speak of the probability that a certain tree will die when the tree is in someone's backyard .... You are talking about a personal asset, a friend,
a monument, not about board feet of lumber.
- Roger Swain

21st November 2011 - Finally we've had some GOOD rain! (30mm in a couple of hours) and this will really boost my lawn, which has still been yellow since the winter. The trees are also all fresh, green and sparkling clean, as is evident from the sketch of a few leaves of one of my Karees (Rhus lancea) indigenous to Southern Africa. It's a bit of an untidy tree, with a weird growing habit of the branches backing up on one another and having most of its leaves right at the tip of the branches. It has a graceful, weeping form and dark, fissured bark that contrasts well with its long, thinnish, hairless, dark-green, trifoliate leaves with smooth margins.

The small, inconspicuous flowers are presented as much-branched sprays which are greenish-yellow in colour and are produced from June until September. The male and female flowers occur on separate trees (luckily I have quite a few of them in my garden, so some must be male and some female). The fruit are small (up to 5mm in diameter), round, slightly flattened and covered with a thin fleshy layer which is glossy and yellowish to brown when ripe. The fruits are produced from September until January.

The fruit is eaten by birds such as Bulbuls, Guinea fowl and Francolins. Game animals such as Kudu, Roan antelope and Sable browse the leaves of the tree which can serve as an important food source for them in times of drought. The sweetly scented flowers attract bees and other insects to them. Now re-named Searsia lancea, it is useful in providing natural soil stabilisation and increasing infiltration of rainwater into the soil thus reducing erosion and raising the ground water table.

The leaves of the Karee provide valuable fodder for livestock but can taint the flavour of milk if eaten in large quantities by dairy cattle as a result of the resin contained in them. The tree is also an important source of shade for livestock in certain regions. The bark, twigs and leaves provide tannin. In the past the hard wood was used for fence posts, tool handles and parts of wagons. Bowls, tobacco pipes and bows were also made from the wood. The fruits are edible and were once used as an important ingredient of mead or honey beer. The word karee is said to be the original Khoi word for mead.

Camera : Kodak EasyShare C195 - pic taken in my garden (Tarlton, South Africa).

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Grass Aloes

In the hope of reaching the moon
men fail to see the flowers
that blossom at their feet.
- Albert Schweitzer

Watercolour sketch in my 'Nature' Journal

I found a large clump of Grass Aloes not far from home on the road to Magaliesburg (South Africa), flowering profusely after all the veld fires we have had this winter, spread out over the charred landscape, providing bursts of red colour.

Grass Aloes are an appealing group of deciduous aloes. As the name implies, they grow mainly in grasslands subject to winter fires. Their leaves and colours resemble their habitat, making them difficult to find when not in flower. These largely miniature aloes have very attractive flowers, making them desirable, if difficult, plants to cultivate. Their growing pattern is closely related to the winter fire cycles of the veld here in South Africa, some species responding directly to burning and producing leaves, flowers and later seed after such events.

This interesting Aloe belongs to a group of deciduous aloes known as the "Grass Aloes", which are adapted to grassland habitat and are able to survive both fire and frost during the cold dry months. They are often burned during winter and then re-sprout with the onset of spring.

This well known grass aloe is commonly found along rocky ridges and rocky slopes on the Witwatersrand and Magaliesberg as well as in mountainous areas of the Northern Province and Mpumalanga. In years gone by it was even more prolific, but numbers have been greatly reduced due to development on the ridges and from harvesting by succulent collectors. A number of different forms are found throughout its distribution range.

Grass fires used to be less frequent in earlier centuries. They were initiated by lightning strikes, on the whole, at the beginning of the rainy season in September and October. These fires were ideal in that they cleared the habitat of moribund grass and other vegetation just before grass aloe species initiated their growth cycles.

Fires are more frequent nowadays and may occur at any time during the dry winter months from May until late spring, October. Plants are as a result, left exposed to harsh conditions for many months before they start to grow. Some species are even starting to appear on the endangered species list.



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Red-chested Cuckoo (Piet-My-Vrou)

A bird in the hand is a certainty, but a bird in the bush may sing.
Bret Harte

30th October 8.04 am and I've just heard the Piet-My-Vrou (Red-chested Cuckoo - Cuculus solitarius) for the first time this season! It's rather late, I normally hear them at the beginning of October, but it's as if they've waited for the first rains before being heard! (We had 20mm of rain last night and 15mm the night before, so the world around here in Tarlton (Gauteng, South Africa) is looking and smelling sparkling clean!) They're extremely shy and very hard to spot, but I managed to get a quick (not-so-good! so I couldn't post a photograph) shot with my camera before he disappeared back into the thick foliage. Had to use my bird book to complete all the colours.

I have held most bird species in my hands at least once, but with the Red-chested Cuckoo I have not had that pleasure.

In Southern Africa, all cuckoos are "migratory" (the Klaas's and Emerald Cuckoos appear to be resident in the warmer east), arriving from Central or Eastern Africa at the start of the rainy season in late September and October. Upon arrival, the males establish territories and advertise their presence to females (and birdwatchers!) by calling incessantly, sometimes even after dark.

The Red-chested Cuckoo is mainly found in the eastern half of southern Africa, and is quite common in protected areas, living in a wide range of habitats. It feeds mostly on invertebrates, particularly hairy caterpillars but also grasshoppers and beetles, amongst others. It mostly parasitizes members of Muscicapidae (robins, thrushes, flycatchers, etc.), rushing into their nests, and removing the host's eggs before laying one of its own, all in just 5 seconds! Once the chick is 2 days old, it evicts the host's eggs and nestlings. It stays in the nest for 17-21 days, and is dependent on its host parents for 20-25 days more, before becoming fully independent. (Info from Wikipedia)

This Cuckoo occurs throughout Africa south of the Sahara, but avoids arid regions. In southern Africa it is common in eastern Botswana, Zimbabwe, Mozambique, Swaziland and eastern and southern South Africa. It generally prefers Afromontane forest, closed woodland, Miombo woodland, open savanna thickets, stands of trees in human settlements, mature gardens and parks.

Piet-my-vrou [Afrikaans]; Uphezukomkhono [Xhosa]; uPhezukomkhono [Zulu]; Mukuku (generic term for cuckoos and coucals) [Kwangali]; Tlo-nke-tsoho [South Sotho]; Phezukwemkhono [Swazi]; Ngwafalantala [Tsonga]; Heremietkoekoek [Dutch]; Coucou solitaire [French]; Einsiedlerkuckuck [German]; Cuco-de-peito-vermelho [Portuguese]
Info from "Biodiversity"



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