prothallus

Independent gametophyte phase of horsetail or fern.

Prothallus

• (n.) The minute primary growth from the spore of ferns and other Pteridophyta, which bears the true sexual organs; the oophoric generation of ferns, etc.
Found on http://thinkexist.com/dictionary/meaning/prothallus/

Prothallus

Pro·thal'lus noun ; plural Prothalli . [ New Latin , from Greek ... before + ... a young shoot.] (Botany) The minute primary growth from the spore of ferns and other Pteridophyta , which bears the true sexual organs; the oöphoric generation of ferns, etc.
Found on http://www.encyclo.co.uk/webster/P/181

prothallus

A gametophyte body, especially in ferns and related plants. ... (09 Oct 1997) ...
Found on http://www.encyclo.co.uk/local/20973

prothallus

a gametophyte body, usually flattened and delicate; e.g. in ferns and fern allies.
Found on http://en.wikipedia.org/wiki/Glossary_of_botanical_terms

prothallus

a weft of fungal hyphae (white, reddish or blue-black) at the margin of the thallus, lacking photobiont, often projecting beyond the thallus onto the substratum.
Found on http://www.anbg.gov.au/glossary/webpubl/lichglos.htm

Prothallus

In ferns, a small heart-shaped bisexual gametophyte.
Found on http://www.superglossary.com/Glossary/Science/Biology/
No exact match found