- a simple vegetative body undifferentiated into true leaves, stem, and root, ranging from an aggregation of filaments to a complex plantlike form.
Origin of thallus
Examples from the Web for thalli
Historical Examples of thalli
Other algae doubtless sometimes occur in the thalli of Peltigerae.Ohio Biological Survey, Bull. 10, Vol. 11, No. 6
Bruce Fink and Leafy J. Corrington
These structures cannot then be produced from the product of a single spore nor even from the thalli derived from any two spores.
- the undifferentiated vegetative body of algae, fungi, and lichens
Word Origin for thallus
Latin, from Greek thallos "green shoot, twig," related to thalia "abundance," thalos "scion, child," ultimately from PIE root *dhal- "to bloom" (cf. Old Irish duilesc, a type of algae).
- A plant body or fungus undifferentiated into stem, root, or leaf.
- A type of body found among plants and fungi that is not differentiated into roots, stems, or leaves. Thalli are found among lichens, mosses, liverworts, and many algae, as well as the gametophyte generations of horsetails and ferns, which have rhizoids but not true roots.