Thalloid

Word THALLOID
Character 8
Hyphenation thal loid
Pronunciations N/A

Definitions and meanings of "Thalloid"

What do we mean by thalloid?

Of, resembling, or constituting a thallus. adjective

In botany, resembling or consisting of a thallus.

Resembling, or consisting of, thallus. adjective

Of or pertaining to a thallus. adjective

Of a plant, alga, or fungus lacking complex organization, especially lacking distinct stems, roots, or leaves. adjective

Of or relating to or resembling or consisting of a thallus adjective

Here you will find one or more explanations in English for the word thalloid. Define thalloid, thalloid synonyms, thalloid pronunciation, thalloid translation, English dictionary definition of thalloid.

Synonyms and Antonyms for Thalloid

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The word "thalloid" in example sentences

The familiar duckweed which covers the surface of a pond consists of a tiny green "thalloid" shoot, one, that is, which shows no distinction of parts -- stem and leaf, and a simple root growing vertically downwards into the water. ❋ Various (N/A)

In thalloid forms fimbriate or lobed margins or outgrowths from the surface lead to the same result. ❋ Various (N/A)

In thalloid forms the sexual organs are often sunk in depressions, while in the foliose forms protection is afforded by the surrounding leaves. ❋ Various (N/A)

The spore on germination forms a short filament which soon broadens out into the thalloid protonema. ❋ Various (N/A)

The Marchantiales are a series of thalloid forms, in which the structure of the thallus is specialized to enable them to live in more exposed situations. ❋ Various (N/A)

The lower members of the Jungermanniales are also thalloid, but the thallus never has the complicated structure characteristic of the Marchantiales, and progress is in the direction of the differentiation of the plant into stem and leaf. ❋ Various (N/A)

The protonema forms a flat, lobed, thalloid structure attached to the soil by rhizoids, and the plants arise from marginal cells. ❋ Various (N/A)

In thalloid forms a thinner marginal expansion or a definite wing increasing the surface exposed to the light can be distinguished from a thicker midrib serving for storage and conduction. ❋ Various (N/A)

The characteristics, then, of the mosses are, that the sexual generation is leafy, the one or two asexual generations are thalloid, and that the spore-bearing generation is in parasitic connection with the sexual generation. ❋ Various (N/A)

The sexual generation is a small green thalloid structure called a prothallium, which bears antheridia and archegonia, each archegonium having a neck-canal and oosphere, which is fertilized just as in the moss. ❋ Various (N/A)

The Green Algæ will be studied in greatest detail, on account of their morphological importance as exhibiting a varied and instructive differentiation of forms from unicellular plants to colonial, coenocytic, and thalloid plant-bodies; and as the group to which the higher plants are most nearly allied. ❋ Unknown (1914)

Rarely the thallus extends upward as a veil which surrounds the apothecia laterally and suggests how the thalloid exciple of higher families probably arose. ❋ Leafy Jane Corrington Hilker (1894)

Apothecia usually surrounded by a thalloid veil 1. ❋ Leafy Jane Corrington Hilker (1894)

Thallus foliose, but smaller and thinner than that of _Peltigera_, and devoid of trichomatic hyphae, more or less closely attached to the substratum by rhizoids; cortex well developed on both upper and lower sides; medulla well developed (Fig. 2); apothecia confined to the lower side of the thallus, marginal on narrow, slightly elongated lobes, thalloid margin persistent and crenate; hypothecium usually some shade of brown; hymenium usually pale below and brown above; paraphyses simple or branched; spores brown, 4-celled, 8 in each ascus. ❋ Leafy Jane Corrington Hilker (1894)

Other cases of the plant being, with the exception of the sexual branches, apparently thalloid, are on the other hand to be explained as due to the reduction of the leaves and flattening of the stem of a shoot (_Pteropsiella_, ❋ Various (N/A)

In pteridophytes it becomes the conspicuous part of the plant, the gametophyte being reduced to a small thalloid body (prothallium); in seed plants it is the only stage visible to ordinary observation, the whole visible tree, shrub or herb being the sporophyte. " ❋ Unknown (1988)

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