hypothallus

American  

[hahy-puh-thal-uhs, hip-uh-] / ˌhaɪ pəˈθæl əs, ˌhɪp ə- /

noun

plural

hypothalli

1. a layer of hyphae rimming the thallus of certain lichens.

2. a filmlike residue at the base of the sporangia of certain slime molds.

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Etymology

Origin of hypothallus

From New Latin, dating back to 1850–55; see origin at hypo-, thallus

Example Sentences

The stipe, springing from a small hypothallus, is dark red below for about one-fourth its height, then vermillion, above expanding slightly beneath the peridium; the columella scant or none.

From The North American Slime-Moulds A Descriptive List of All Species of Myxomycetes Hitherto Reported from the Continent of North America, with Notes on Some Extra-Limital Species by MacBride, Thomas H. (Thomas Huston)

The hypothallus is sometimes hardly discoverable, anon well developed, out-spread, rugulose, far beyond the limits of the fructification.

From The North American Slime-Moulds A Descriptive List of All Species of Myxomycetes Hitherto Reported from the Continent of North America, with Notes on Some Extra-Limital Species by MacBride, Thomas H. (Thomas Huston)

Stipe long, erect, gray to mouse-color, darker below, arising from a thin hypothallus.

From The Myxomycetes of the Miami Valley, Ohio by Morgan, A. P. (Andrew Price)

The globose brilliantly iridescent sporangia are lifted above the substratum on snow-white columnar stalks; these are again joined one to another by the pure white vein-like cords of the reticulate hypothallus.

From The North American Slime-Moulds A Descriptive List of All Species of Myxomycetes Hitherto Reported from the Continent of North America, with Notes on Some Extra-Limital Species by MacBride, Thomas H. (Thomas Huston)

Stipe long, erect, reddish-brown, arising from a thin hypothallus.

From The Myxomycetes of the Miami Valley, Ohio by Morgan, A. P. (Andrew Price)