DNA research has confirmed difference between European Rhus and our Searsia. Tolerates frost. Searsia lancea does not have an aggressive root system and can be used near paving and tarred surfaces. The insect studies showed strong associations of KMD symptoms with psyllids, a group known to cause galls and vector plant pathogens that can cause symptoms similar to malformations. Karee trees are planted as fences along borders or waterholes. Unfortunately, when your trees are ill, the signs can be subtle. While those spots look worrisome, it’s just tar spot–a fungal disease that isn’t a big issue to your tree’s health. It is recommended that further research focus on the potential role of psyllids, along with thrips and aphids, in the formation of karee malformation disease. Bulbuls eat the ripe fruit on the tree, and guinea fowl and pheasants eat the fruit waste on the ground. A comparative fungal survey was conducted between healthy and malformed samples of S.lancea to determine whether Fusarium species are present in these samples, or if other fungal species could be possibly associated with the disease. These different trends in fungal and insect biodiversity between healthy and malformed S.lancea indicate that malformations represent a unique niche within trees with complex interactions between plant, microbes and insects. In North America, where it is naturalized, it is known as African sumac and willow rhus. Usually occurs in the forest along waterholes, grow in almost all soils. This study represents the first disease report for a new malformation disease affecting the ubiquitous South African tree species Searsia lancea. Rounded or Spreading Shape. Leaves lack stipules. No other fungal species that are known to cause such type of symptoms were isolated. A versatile, low maintenance tree, the Karee can adapt to a variety of planting scenarios making it an ideal tree in our harsh South African climate. Growing to a height of between 7 and 8 m, with a similar spread, the tree is evergreen providing shade in the hot summers. White Karee Overview. Common names: Karee, Bastard willow, Karoo tree, taaibos, Rooikaree. Fusarium does not appear to be a prominent fungus in KMD symptoms, nor is it a prominent endophyte. Chlorosis. The Searsia lancia is usually a single-stemmed, low branching tree … This evergreen tree makes a beautiful focal point in a garden as it has an unusual shape, interesting gnarled bark and stunning, large, grey-green leaves. Family: Anacardiaceae (Mango family), which has about 83 genera and 850+ species – including Cashew). Origin: Southern Africa. Chlorophyll is what gives the green color to leaves and allows the use of sunlight for food and energy production. The fever tree which grows in Kruger National Park is a tall growing type of acacia. Additional Common Names. Interesting info: Previously Rhus pedulina (=R. Bulbuls eat the ripe fruit on the tree, and guinea fowl and pheasants eat the fruit waste on the ground. Trees may be referred to as male or female. Symptoms to tree pollen are most often seen in springtime but may occur during the summer and autumn months. The karee is an excellent evergreen shade tree; especially in hot dry regions, that … The bark is reddish-brown in young branches, but rough and dark brown in older branches and stems. ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. First report of a new malformation disease of common karee (, https://doi.org/10.1016/j.sajb.2018.09.033. It is a hardy, evergreen tree of medium size, and works well for smaller gardens. Searsia lancea(karee) is a common native tree in South Africa. The flowering season is between June and September, and fruit begins to form from September to January. A new disease called Karee Malformation Disease (KMD) consists of hypertrophic malformations occurring mostly on vegetative and floral tissues2. These are the features of a healthy tree: […] It’s easy to identify. Synonyms. The flowers are yellow and fruit is small, round and slightly flattened. The observed symptoms resemble those of mango malformation disease caused by fungal species in the important pathogen genus Fusarium. … Curry Leaf Tree Read More » Is your tree in trouble–or even a goner? ernst@treecarepta.co.za, Sign up today to receive our monthly newsletter. We manufacture quality Indigenous Wooden Picture Frames for the Retail and Wholesale market, in various styles and colours. Countdown Timer. Perfect for the suburban garden, Searsia pendulina is an evergreen, wind-resistant and drought-tolerant tree. The Karee (Rhus Lancea) tree is an evergreen tree with a loose rounded crown to 9m high. Rhus lancea / Searsia lancea - Karee The Karee tree is quick growing, very popular and widely used as a shade tree. AFRICAN SUMAC, KAREE. Psyllids were dominant in the malformations. viminalis), now reclassified as Searsia. The karee has a course textured bark and on older specimens it is dark grey or brown in colour while on young branches and trees it is a reddish brown-colour. Symptoms include yellowing leaves, stunted growth, branch die-back and leaf scorch. It is wide spread and is only missing from Kwazulu Natal. The worst offending Searsia is S. pyroides , the fire thorn, that may cause a burning sensation if a twig pricks or scratches you. Growth Rate: 24 Inches per Year. Several birds eat the fruit. Results also indicated that malformed symptoms host a much higher number of fungi and insects than healthy tissues, and represent a unique niche within the tree. Rhus lancea. With the cold and frosty weather most areas in South Africa are experiencing now, this evergreen and frost hardy tree will be a winner. Roots are used to treat venereal diseases and also as purgatives. 387. Spreading or Weeping with a Low Canopy. Karee Tree Designs, Heidelberg, Western Cape. Tree Characteristics. It is one of the most common trees on the Highveld and in the Bushveld in South Africa, but not found in the Lowveld. The Karee tree was previously known as Rhus Lancea. The karee is an excellent shade tree especially in hot regions such as the Karoo and Kalahari since it is evergreen and drought resistant. They are also planted for this purpose in groups of 10 to 20.