Branches continuous. Leaves alternate. Spinous shrubs. Flowers solitary. Filaments flattened; connective pointed. Style long. Pericarp membranous.--Species 1. North Africa. =Noaea= Moq. 8. Perianth-segments united at the base, wingless in the fruit, but one of them sometimes produced into a prickle. Style long. Shrubs. 9 Perianth-segments free, winged in the fruit, at least some of them. Style short. Disc lobed. Leaves alternate. Flowers in clusters. 10 9. Leaves opposite. Flowers in pairs, hermaphrodite. Disc indistinct.--Species 1. Sahara. =Nucularia= Battand. Leaves alternate. Flowers in clusters, polygamous. Disc lobed.--Species 2. North Africa and Northern Central Africa. =Cornulaca= Del. 10. Inner perianth-segments not winged in the fruit. Stamens with a 2-lobed connective. Shrubs.--Species 1. North Africa. (Under _Halogeton_ C. A. Mey.) =Agathophora= Fenzl Inner and outer perianth-segments winged in the fruit. Stamens with a blunt connective. Herbs.--Species 1. North-West Africa (Algeria). Used as a vegetable or for making soda. =Halogeton= C. A. Mey. 11. (1.) Branches more or less distinctly jointed. Leaves little developed, glabrous. Flowers in clusters, usually of 3, arising in the axils of scale-like bracts or apparently sunk in hollows of the rachis and collected in cone-shaped inflorescences. Stamens 1-2. [Tribe SALICORNIEAE.] 12 Branches continuous. Leaves well developed, usually hairy. Flowers solitary or in clusters, more rarely in spike-like inflorescences. Stamens 3-5, more rarely 1-2. 16 12. Bracts and upper leaves alternate. 13 Bracts and upper leaves opposite. 14 13. Perianth slightly flattened from the side, 4-5-toothed, surrounded by a wing-like border. Stamens 2. Ovule with a short funicle. Micropyle of the ovule and radicle of the embryo inferior. Low shrubs.--Species 1. North-West Africa (Algeria). =Kalidium= Moq. Perianth flattened from the back, 3-toothed, without a wing-like border. Ovule with a long funicle. Micropyle and radicle superior or ascending.--Species 2. North Africa to Nubia. Yield soda. =Halopeplis= Bunge 14. Bracts free, peltate, deciduous. Perianth 3-parted. Stamen 1, inserted in front. Ovule on a long, curved, almost ring-shaped funicle. Micropyle and radicle superior. Shrubs.--Species 1. North Africa to Eritrea. Yields soda. =Halocnemum= Marsch. Bieb. Bracts united, persistent; flower-clusters apparently sunk in hollows of the branch-joints. Perianth 3-4-toothed or-cleft. Stamen 1, inserted behind, or stamens 2. Ovule on a short funicle. Micropyle and radicle inferior. 15 15. Seed smooth or tubercled; embryo curved; albumen abundant, lateral. Stamens 2. Stigmas 2. Shrubs.--Species 3. North and Central Africa. They yield soda and are used in medicine. =Arthrocnemum= Moq. Seed hairy; embryo folded together; albumen scanty and central or wanting.--Species 4. Sea-coasts. They yield soda and are used in medicine. =Salicornia= L.