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Pakistan | Family List | Pakistan V. 205 | Polygonaceae

16. Atraphaxis Linnaeus, Sp. Pl. 333. 1753; Gen. Pl. ed. 5.1754; Boiss., Fl. Or. 4: 1019. 1879; N.V.Pavlov in Kom., Fl. URSS 5: 501. 1936; D.A.Webb in Tutin et al. Fl. Europ. 1: 89. 1964; Cullen in P.H.Davis, Fl. Turk. 2: 266. 1967; Rech. f., & Schiman-Czeika in Rech. f., Fl. Iran. 56: 30.1968; Boulos, Fl. Egypt 1: 22. 1999; Chaudhary, Fl. Kingd. Saudi Arab. 1: 313. 1999.

Shrub or undershrubs. Branches often ending into spines. Leaves small, coriaceous or fleshy, rarely thin, sessile or short petioled; ochreae connate, rarely splitting to the base, usually with 2 linear or linerar-lanceolate appendages at the apex. Flowers small, solitary or in fascicles of 2-3 or in loose racemes, arising from the ochreolae;bisexual. Perianth segments 4-5 in whorls, outer 2 smaller, reflexed in fruit, inner 2-enlarged, erect, enclosing the fruit. Stamens 6 or 8, inserted at the base of perianth, united into a glandular ring. Carpels 2-3; ovary lenticular or trigonous; styles 2-3, short, distinct or connate at base; stigmas 2-3, capitate. Fruit a lenticular or trigonous nut; seeds small with linear cotyledons.

A genus with 25 species, distributed in N. Africa and S.E. Europe to Himalayas, E. Siberia and S. & S.W. Asia. It is represented by 2 species in Pakistan.


1 Flowers in capitate or elongated racemes with a distinct rachis. Perianth segments 5. Stamens 8. Styles 3. Fruit trigonous.   1 A. pyrifolia
+ Flowers in axillary fascicles, rachis absent. Perianth segments 4. Stamens 6. Styles 2. Fruit compressed, lenticular.   2 A. spinosa

Lower Taxa


 

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