SCHOUW'S PHYTO-GEOGEAPHIC EEGIONS. 685 



Lobeliacese, Goodeniacese, and CyrtandresB, are met with in those 

 islands. Mean temperature, 73° to 83°. The cultivated plants are^ 

 Bread-fruit tree, Coco-nut, Double Coco-nut^ Yams, Plantain, Cabbage- 

 Palm, Paper-Mulberry, Tare, Kava. 



12. The Kegion of Amyridaceee, or of Balsam trees, Arabian flora 

 (Forskal's Eegion). — This comprehends the Persian or Arabian Flora, 

 especially the south-western part of the highlands of Arabia or Yemen. 

 In this region are many trees yielding gums and balsamic resins, as 

 species of Mimosa, Acacia, Balsamodendron, Boswellia. There are 

 many Indian forms in this region. Cultivated plants are — Maize, 

 Millet, Date-palm, Coco-nut, Pig, Apricot and Peach, Plum, Apple, 

 Quince, Vine, Coffee-tree, Tamarind, Papaw, Sugar-cane, Ginger, 

 Cotton, and Indigo. 



13. The Desert Eegion (Delile's Eegion). — This includes Northern 

 Africa, to the south of the mountains of Atlas, between lat. 30° and 

 15° N., and the northern part of Arabia. Phoenix dactylifera, or the 

 Date-palm, and Cucifera thebaica, or Doom palm, are found here. 

 Mean temperature, 73° to 86° F. Cultivation is confined to the 

 valley of the Nile and the Oases. We meet with Guinea Corn, 

 Wheat and Barley, and the South European and Indian grains. 



14. The Eegion of Tropical Africa (Adanson's Region). — This 

 includes that part of Africa lying between the parallel of 15° and the 

 tropic of Capricorn, or between the northern and southern, limits of 

 periodical rains, with the exception of Abyssinia and the unknown 

 countries of the interior. The Flora of the western part of this region 

 is characterised in part by Adansonia, or the Baobab, one of the 

 largest known trees. We also meet with the Elais guineensis, a palm 

 which furnishes oil. Other characteristic plants are Sarcocephalus 

 esculentus and Schmiedelia africana. Vogel noticed, near Cape Coast ■ 

 Castle, Arachis africana, Bignonia tulipifera, Euphorbia drupifera, 

 Hibiscus populneus, and Blighia sapida the Akee. Species of Sorghum, 

 Sterculia acuminata the Kola nut, Physostigma venenosum the Calabar 

 bean, belong to this region. Welwitsch mentions species of Rhipsalis, 

 Monodora, Vellozia, Begonia, Rafflesia parasitic on Csesalpiniese, a tree 

 Umbellifer and Welwitschia mirabilis the Toumbo. The vegetation 

 of Guinea and Congo is a mixture of the Floras of Asia and America, 

 though most resembling the former. The eastern part of the region, 

 including Madagascar, has a peculiar Flora, distinguished chiefly by 

 the genera Danais, Ambora, Dombeya, Dufourea, Didymomeles, and 

 Senacea, Tanghinia, Ouvirandra, Urania, and Buddleia. There are 

 many peculiar genera, but few species. Mean temperature, 72° 

 to 86°. Cultivated plants : Maize, Eice, Guinea Corn and Millet, 



