| Zygnema | |
|---|---|
| |
| Zygnema, showing characteristic dual star-shaped chloroplasts. Numbered ticks are 20 μm apart. | |
| |
| Numbered ticks are 122 μm apart. | |
Scientific classification 
| |
| (unranked): | Viridiplantae |
| (unranked): | Charophyta |
| Class: | Zygnematophyceae |
| Order: | Zygnematales |
| Family: | Zygnemataceae |
| Genus: | Zygnema C. Agardh, 1817 |
| Synonyms | |
Zygnema is a genus of freshwater filamentous thalloid alga comprising about 100 species.[4] A terrestrial species, Z. terrestre, is known from India. Zygnema grows as a free-floating mass of filaments, although young plants may be found anchored to streambeds with a holdfast. The filaments form a yellow-green to bright green colored tangled mat, and are composed of elongate barrel-shaped cells, each with two star-shaped (stellate) chloroplasts arrayed along the axis of the cell.
Species[edit]
Some species include:
- Z. atrocoeruleum
- Z. binuclearioides
- Z. carinthiacum
- Z. carteri
- Z. circumcarinatum
- Z. coeruleum
- Z. conspicuum
- Z. cruciatum
- Z. cyanosphaeroidicum
- Z. cylindricum
- Z. cylindrospermum
- Z. fanicum
- Z. gorakhporense
- Z. insigne
- Z. kashmirense
- Z. kiangsiense
- Z. leiospermum
- Z. melanosporum
- Z. momoniense
- Z. normanii
- Z. oveidanum
- Z. pectinatum
- Z. peliosporum
- Z. quadrispirale
- Z. ralfsii
- Z. rivulare
- Z. ruviatum
- Z. schwabei
- Z. spontaneum
- Z. stagnale
- Z. stellinum
- Z. subtile
- Z. tenue
- Z. tenuissimum
- Z. terrestre
- Z. vaginatum
- Z. vaucherii
- Z. verrucosum
References[edit]
- ^ a b c d e f g h i Guiry, M.D. (2013). Taxonomy and nomenclature of the Conjugatophyceae (=Zygnematophyceae). Archived March 5, 2016, at the Wayback Machine Algae. An International Journal of Algal Research 28: 1-29.
- ^ "Algaebase, entry for Lucernaria". Retrieved 20 February 2016.
- ^ "Algaebase, entry for Pleurodiscus". Retrieved 9 September 2014.
- ^ Guiry, M.D.; Guiry, G.M. (2008). "Zygnema". AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. Retrieved 2009-02-21.
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction