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Polycnemoideae : ウィキペディア英語版 | Polycnemoideae
The Polycnemoideae are a small subfamily of plants in the Amaranthaceae family, representing a basal evolutionary lineage. The few relictual species are distributed in Eurasia and North Africa, North America, and Australia. == Description == The subfamily Polycnemoideae comprises small herbs; some species are weakly lignified and grow shrublike. The subfamily is distinguishable from all other members of Amaranthaceae by normal secondary growth. The alternate or opposite leaves are often linear or subulate. The stomata of the leaves are arranged in parallel to the midveins.〔 The bisexual flowers are sitting solitary in the axil of a bract and two bracteoles. The inconspicuous perianth is formed of chartaceous, scarious, white or pinkish tepals. One to five stamens are present with their filaments united in a short but distinct filament tube (like in Amaranthoideae subfamily). Anthers are with only one lobe and two pollen sacs (bilocular, like in Gomphrenoideae subfamily). In fruit, the tepals are never conspicuously modified.〔
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