All Floras      Advanced Search
Page 8 Login | eFloras Home | Help
Pakistan | Family List | Lythraceae

Ammannia Linn., Sp. P1. 119. 1753. Gen. Pl. ed. 5:55.1754; D.A. Webb in Tutin et al, l.c. 302; Pol. & Rech. f. in Rech. f., l.c. 7; Chamberlain in Davis, l.c. 179.

Ammannia auriculata

Credit: M.Y. Saleem

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.

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.

1 Leaves ± scabrid above. Hypanthium ± quadrangular, top-shaped. Epicalyx prominent. Calyx ± scabrid. Capsule shorter than calyx   Ammannia verticillata
+ Leaves glabrous. Hypanthium not quadrangular, ± campanulate. Epicalyx minute or obscure. Calyx glabrous. Capsule ± equalling the calyx   (2)
2 (1) 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
+ Leaves ± auriculate at the base. Cymes pedunculate, lax. Flowers pedicellate. Hypanthium ribbed. Style 1-2 mm long   (3)
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

Lower Taxa

Related Synonym(s):


Related Objects  

Flora of China  
  • Ammannia.pdf
  • PDF

     |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |