Home Flora of Pakistan
Home
Name Search
Families
Genera
Species
District Map
Grid Map
Inventory Project
Ceratophyllaceae Gray Search in IPNISearch in NYBG Virtual Herbarium Decrease font Increase font Restore font
 

Publicado en: A Natural Arrangement of British Plants 2: 395, 554. 1822. (10 Jan 1822) (Nat. Arr. Brit. Pl.) Name publication detail
 

Datos del Proyecto Nombre (Last Modified On 6/2/2011)
Aceptación : Accepted
Datos del Proyecto     (Last Modified On 6/3/2011)
Contributor Text: KHADIJA AZIZ
Contributor Institution: Department of Botany, University of Karachi, Karachi
General/Distribution: An unigeneric family, with 10 (or 1 polymorphic) species, cosmopolitan in distribution.
Comment/Acknowledgements: Acknowledgements: We are grateful to the United States Department of Agriculture for financing this research under P.L. 480. Thanks are also due to Mr. B.L. Burtt, Dr. S. I. Ali and Dr. S. M. H. Jafri for helpful suggestions.

 

Export To PDF Export To Word
Aquatic, rootless, submerged, perennial, monoecious herbs; young plants green to olive green, older brown with thin, slender stems. Leaves whorled, 1-4 times dichotomously divided, much crowded towards the apex, stipulate; segments linear or filiform, often minutely toothed at irregular intervals with horny apices; horns usually 2, sometimes a glandular process is present in-between. Flowers minute, axillary, sessile, unisexual. Perianth or involucre 6-15, basally connate, subvalvate, apically terminated by 1-2 spines. Staminate flowers with 8-30 stamens on convex torus; filaments very short, broad, anthers 2-celled, extrorse, linear-oblong; connective projecting, apex truncate or provided with 2 sharp spines. Pistillate flowers greenish to orange-red with 1-carpelled, 1-locular, 1-ovuled, superior ovary; style subulate, stigma one-sided; ovule orthotropous pendulous. Fruit a 1-seeded nut, ellipsoidal or ovoid, with long persistent style and 2 sharp spines near the base, smooth, tubercled, winged or provided with 2-5 lateral spines. Seeds exalbuminous; embryo straight; cotyledons oval, thick.
 

Lower Taxa
 
 
© 2014 Missouri Botanical Garden - 4344 Shaw Boulevard - Saint Louis, Missouri 63110