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9. Atraphaxis Linnaeus, Sp. Pl. 1: 333. 1753.
木蓼属 mu liao shu
Bao Bojian (包伯坚); Alisa E. Grabovskaya-Borodina
Shrubs much branched; woody branches with spines or not, herbaceous branchlets of current year with leaves and flowers. Leaves simple, alternate, rarely fascicled, nearly sessile; ocrea membranous, usually with 2 veins, 2-parted at apex. Inflorescence racemose, terminal, or lateral, with dense or sparse axillary flowers. Pedicel slender, jointed. Flowers hermaphroditic. Perianth persistent, 4- or 5-parted, inflated in fruit. Stamens 6 or 8; filaments dilated at base and united into a glandular ring. Ovary lenticularly compressed or trigonous; styles 2 or 3, short; stigmas capitate. Achenes lenticular or trigonous.
About 25 species: N Africa, C, N, and SW Asia, S Europe; 12 species (two endemic) in China.
The reader can refer to Borodina (Rast. Tsentral. Azii 9: 93–97. 1989) for taxa in adjacent Central Asian countries.
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| 1 |
Tepals 4; stamens 6; styles 2; achenes lenticularly compressed. |
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(2) |
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Tepals 5; stamens 8; styles 3; achenes trigonous. |
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(4) |
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| 2 (1) |
Branchlets of current year and leaves with densely papillate hairs. |
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3 A. canescens |
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Branchlets of current year and leaves without papillate hairs. |
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(3) |
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| 3 (2) |
Leaves fascicled; herbaceous branchlets of current year very short. |
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2 A. compacta |
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Leaves alternate; herbaceous branchlets of current year longer, slender. |
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1 A. spinosa |
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| 4 (1) |
Herbaceous branchlets and leaves with papillate hairs; leaves bright green, without raised reticulate veins. |
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4 A. laetevirens |
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Herbaceous branchlets and leaves without papillate hairs; leaves with raised reticulate veins. |
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(5) |
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| 5 (4) |
Leaves grayish green or bluish green. |
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(6) |
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Leaves green or yellow-green. |
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(8) |
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| 6 (5) |
Woody branches pointed at apex; inflorescence a short raceme ca. 15 mm. |
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5 A. pungens |
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Woody branches obtuse at apex; inflorescence a panicle or raceme. |
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(7) |
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| 7 (6) |
Shrub 1.5-2 m tall; annual branches lengthened, virgate, dying only in higher part, as a rule branched; inflorescence a panicle with leaves. |
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8 A. virgata |
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Subshrub 30-50 cm tall; annual branches dying for most part, usually not branched; inflorescence a raceme, flowers from ocrea bracteate. |
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9 A. frutescens |
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| 8 (5) |
Woody branches acuminate into point at apex. |
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(9) |
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Woody branches obtuse at apex, not pointed. |
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(10) |
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| 9 (8) |
Leaves elliptic or obovate, 15-25 × 10-13 mm, with prominent reticulate veins; pedicel ca. 1 cm, jointed at lower 1/3; perianth light yellow-red. |
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6 A. pyrifolia |
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Leaves linear or lanceolate, 15-30 × 1-3 mm; midvein prominent; pedicel 5-10 mm, jointed at upper 1/3; perianth light green. |
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7 A. irtyschensis |
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| 10 (8) |
Leaves oblong or elliptic, or lanceolate, prominently veined; outer tepals reniform, spreading in fruit. |
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12 A. bracteata |
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Leaves oblanceolate-oblong or lanceolate to linear, not prominently pinnately veined; outer tepals oblong or oblong-ovate, reflexed in fruit. |
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(11) |
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| 11 (10) |
Outer tepals oblong-ovate, ca. as long as or slightly shorter than above joint portion of pedicel. |
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10 A. decipiens |
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Outer tepals oblong, longer than above joint portion of pedicel. |
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11 A. manshurica |
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List of lower taxa
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