AskDefine | Define thallophyte

Dictionary Definition

thallophyte n : any of a group of cryptogamic organisms consisting principally of a thallus and thus showing no differentiation into stem and root and leaf

User Contributed Dictionary



  1. Any of a large number of plants that consist of a thallus only, with no flower, leaves etc.



plant consisting of thallus only

Extensive Definition

The thallophytes are a polyphyletic group of non-mobile organisms traditionally described as "relatively simple plants" or "lower plants" with undifferentiated bodies (thalli). They were a defunct division of Kingdom Plantae, the Thallophyta (or Thallobionta) that included fungus and algae, and lichens occasionally bacteria and the Myxomycophyta.
They are sometimes referred to as "thalloid plants", as opposed to vascular plants. Stephan Ladislaus Endlicher, a 19th-century Austrian botanist, separated the Vegetable Kingdom (equivalent of Kingdom Plantae) into the Thallophytes and the Cormophytes (vascular plants) in 1836. Thallophytes were known as the Thallogens according to John Lindley, an English botanist in the 19th century. Likewise, Cormophytes were also known as Cormogens in the Lindley system.
The term was used only in former classifications: comprising what is now considered a heterogeneous assemblage of flowerless and seedless organisms: algae; bacteria; fungi; lichens.
thallophyte in Catalan: Tal·lòfit
thallophyte in German: Thallophyten
thallophyte in Persian: ریسه‌داران
thallophyte in French: Thallophyte
thallophyte in Irish: Thallophyta
thallophyte in Italian: Tallofite
thallophyte in Hungarian: Telepes növények
thallophyte in Macedonian: Талофита
thallophyte in Polish: Plechowce
thallophyte in Portuguese: Talófita
thallophyte in Vietnamese: Thực vật nguyên sinh
thallophyte in Chinese: 同節植物
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