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31. Haloxylon Bunge, Mém. Acad. Imp. Sci. St.-Pétersbourg Divers Savans. 7: 468. 1854.
琐琐属 suo suo shu
Shrubs or trees, glabrous, or cottony in leaf axils. Stem erect, much branched; older branches terete, annual ones green or blue-green, pointed. Leaves opposite, reduced to scales or nearly absent, bases united, apex obtuse or with a short awn. Flowers solitary in leaf axils, bisexual, with 2 bractlets. Perianth segments 5, free, papery or dry membranous, abaxially with a distal, transverse wing in fruit, adaxially concave, base usually arachnoid; wing horizontal, membranous, longitudinally veined. Disk cupular. Stamens 5, inserted on disk; anthers elliptic, without an appendage. Ovary base sunken into disk; style very short; stigmas 2-5. Utricle hemispheric, apically slightly concave; pericarp fleshy, adnate to seed. Seed horizontal; embryo green, spiral; perisperm absent.
About 11 species: from the Mediterranean region to C Asia; two species in China.
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1 |
Leaves appressed to stem, triangular, apex awned. |
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1 H. persicum |
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Leaves slightly spreading, broadly triangular, apex awnless. |
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2 H. ammodendron |
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Lower Taxa
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