Equisetaceae


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to Equisetaceae: Equisetales

Equisetaceae

 

(horsetails), a family of plants of the class Equisetopsida. The stems have lost the capacity for secondary growth in thickness, and the leaves are reduced. The strobiles (spikes), which bear sporophylls with sporangia, are located on the shoot apexes. Archegonia and antheridia form on the bisexual or unisexual gametophytes (prothallia) that develop from the spores. Spermatozoids with numerous flagella form in the antheridia. After fertilization, the gametophyte gives rise to one or more sporophytes; thus, there is regular alternation of sexual and asexual generations. Representatives of this family include extant species of the genus Equisetum and extinct species of the genera Equisetites, Schizoneura, and a few others.

References in periodicals archive ?
Binder 116 Verbena pogostoma Latak qura H Klotzsch PTERIDOPHYTA EQUISETACEAE 117 Equisetum bogotense Kunth Shaka, cola de H caballo No.
Vegetation categories other than grasses, sedges and rushes were mostly composed of species of Amaranthaceae, Asteraceae, Polygonaceae and Equisetaceae and were similar throughout the landscape in both years.
Siete familias presentan esporas de tipo monolete (Aspleniaceae, Blechnaceae, Dryopteridaceae, Gleicheniaceae, Lomariopsidaceae, Polypodiaceae y Thelypteridaceae), ocho familias presentan esporas de tipo trilete (Cyatheaceae, Dicksoniaceae, Grammitidaceae, Hymenophyllaceae, Lophosoriaceae, Lycopodiaceae, Plagiogyriaceae y Pteridaceae), una familia presento esporas tanto triletes como monoletes (Dennstaedtiaceae) y solo la familia Equisetaceae presento esporas aletes.
Seven families present monolete spores (Aspleniaceae, Blechnaceae, Dryopteridaceae, Gleicheniaceae, Lomariopsidaceae, Polypodiaceae y Thelypteridaceae), eight present trilete spores (Cyatheaceae, Dicksoniaceae, Grammitidaceae, Hymenophyllaceae, Lophosoriaceae, Lycopodiaceae, Plagiogyriaceae y Pteridaceae), one family presents both spore types (Dennstaedtiaceae) and only Equisetaceae presents alete spores.
La familia Dennstaedtiaceae presento tanto esporas monoletes (Histiopteris, Hypolepis) como triletes (Pteridium), mientras que la familia Equisetaceae fue la unica que presento esporas de tipo aletes.
si EQUISETACEAE Equisetum bogotense Kunth si ESCALLONIACEAE Escallonia myrtilloides L.
A stage 1 endodermis is found in Equisetaceae, Lycopodiaceae, Osmundaceae, Marsileaceae, and Salviniaceae.
Equisetaceae Floyd, Weatherhold 845 Erianthus alopecuroides Poaceae Harrison, R.