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Published In: Species Plantarum 1: 119. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
General/Distribution: Species c. 30. Cosmopolitan. 4 or 5 species occur in Pakistan. Petals are minute and often caducous, hence sometimes may be mistaken for its absence in flower.


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Annual herbs, hygrophilous, glabrous. Stem ± quadrangular. Leaves opposite or whorled, rarely allernate. Inflorescence axillary, biparous cymes or glomerules. Flowers (4-)5-merous, subsessile or pedicellate, 2-bracteolate; bracteoles much shorter than flower. Hypanthium ± membranous in fruit. Epicalyx represented by mere folds, obscure or absent, rarely prominent. Petals 0-4, longer than sepals, caducous. Ovary globose, style absent or short. Capsule included or exceeding the hypanthium, globose, irregularly circum¬scissile.

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1 Leaves glabrous. Hypanthium not quadrangular, ± campanulate. Epicalyx minute or obscure. Calyx glabrous. Capsule ± equalling the calyx (2)
+ Leaves ± scabrid above. Hypanthium ± quadrangular, top-shaped. Epicalyx prominent. Calyx ± scabrid. Capsule shorter than calyx Ammannia verticillata
2 (1) Leaves ± auriculate at the base. Cymes pedunculate, lax. Flowers pedicellate. Hypanthium ribbed. Style 1-2 mm long (3)
+ Leaves attenuate or upper ones ± rounded at the base. Cymes ± sessile, dense. Flowers subsessile or sessile. Hypanthium not ribbed. Style 0-0.5 mm long Ammannia baccifera
3 (2) Calyx erect in fruit. Petals up to 2 mm long, 2 mm broad. Capsule 2-3 mm in diameter Ammannia auriculata
+ Calyx reflexed in fruit. Petals up to 1 mm long, 0.75 mm broad. Capsule 1-1.5 mm in diameter Ammannia multiflora
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