Reproductive isolation from a cross between a horse and a donkey or between a mare and a donkey, respectively. These animals are nearly always sterile due to the difference in the number of chromosomes between the two parent species. Both horses and donkeys belong to the genus "Equus", but "Equus caballus" has 64 chromosomes, while "Equus asinus" only has 62. A cross will produce offspring (mule or hinny) with 63 chromosomes, that will not form pairs, which means that they do not divide in a balanced manner during meiosis. In the wild, the horses and donkeys ignore each other and do not
Eriocephalus africanus an ingredient in medicinal and perfume products. The plant has been used in traditional medicine and in cooking. Essential oil extracts of "E. africanus" are prepared by steam distillation, and contain the following primary aroma components: Eriocephalus africanus Eriocephalus africanus is a bushy shrublet indigenous to South Africa. It has a wide distribution in the Western and Eastern Cape, and in Namaqualand. The plant has several common names in various languages. It is known as the Cape Snow Bush or Kapokbossie (the Afrikaans word for "snow bush"); other common names refer to its fancied resemblance to rosemary, for example "African