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FOC | Family List | FOC Vol. 5 | Polygonaceae | Polygonum

77. Polygonum fertile (Maximowicz) A. J. Li, Fl. Reipubl. Popularis Sin. 25(1): 67. 1998.

青藏蓼 qing zang liao

Koenigia fertilis Maximowicz, Bull. Acad. Imp. Sci. Saint-Pétersbourg 19: 481. 1874.

Herbs annual, dwarf. Stems erect or ascending, 5-10 cm tall, slender, branched, glabrous. Petiole 2-3 mm, slender; leaf blade obovate or elliptic, 3-6 × 2-4 mm, both surfaces glabrous or abaxially sparsely pilose, base subtruncate or broadly cuneate, margin sparsely ciliate, apex obtuse or subacute; ocrea brown, tubular, membranous, 2-cleft, base pilose, apex acute. Inflorescence axillary or terminal, fascicled. Perianth white, 4-parted; tepals elliptic or obovate, 1-1.5 mm. Stamens 3 or 4. Styles 2 or 3, very short; stigmas capitate. Achenes slightly exceeding persistent perianth, brown, dull, narrowly ovoid, biconvex, rarely trigonous, 2-2.5 mm. Fl. Jul-Aug, fr. Aug-Sep.

* Mountain slopes, moist valleys; 2700-4900 m. Gansu, Qinghai, Sichuan, Xizang.


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