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Characteristic of the thallophytes
Answer for the clue "Characteristic of the thallophytes ", 7 letters:
thallus
Alternative clues for the word thallus
Word definitions for thallus in dictionaries
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Thallus \Thal"lus\, n.; pl. Thalli . [NL., fr. Gr. ? young shoot or branch, frond.] (Bot.) A solid mass of cellular tissue, consisting of one or more layers, usually in the form of a flat stratum or expansion, but sometimes erect or pendulous, and elongated ...
Wikipedia
Word definitions in Wikipedia
Thallus is an undifferentiated vegetative tissue of some non-mobile organisms. Thallus may also refer to: Thallus (historian) , the chronologer/historian Thallus (poet) , the Roman era Greek epigrammatist
WordNet
Word definitions in WordNet
n. a plant body without true stems or roots or leaves or vascular system; characteristic of the thallophytes [also: thalli (pl)]
Wiktionary
Word definitions in Wiktionary
n. 1 (context botany English) An undifferentiated plant body, such as in algae. 2 (context botany English) Any plant body lacking vascular tissue.
Douglas Harper's Etymology Dictionary
Word definitions in Douglas Harper's Etymology Dictionary
1829, Latin, from Greek thallos "green shoot, young branch, twig," related to thalia "abundance," thalos "scion, child," ultimately from PIE root *dhal- "to bloom" (cognates: Armenian dalar "green, fresh," Albanian dal' "I sprout," Old Irish duilesc , a ...
Usage examples of thallus.
It reproduced like the vegetable cryptogams, especially the Pteridophyta, having spore cases at the tips of the wings and evidently developing from a thallus or prothallus.
Fungal hyphae occur in the rhizoids and in the cells of the lower region of the thallus of many liverworts, as in the endotrophic mycorhiza of higher plants.
Others appeared to be parasites, sending complex veins ramifying through the thalli of their victims.
In the latter they are protected by special concave scales, while in the Anthocerotaceae they occupy some of the mucilage slits between the cells of the lower surface of the thallus.
The Anthocerotales are a small and very distinct group, in which the gametophyte is a thallus, while the sporogonium possesses a sterile columella and is capable of long-continued growth and spore production.
The small thallus bears the antheridia and archegonia, each of which is surrounded by a tubular involucre, on the upper surface of distinct individuals.
The necks of the archegonia hardly project above the general surface of the thallus.
The dorsiventral thallus is constructed on the same plan throughout the group, and shows a lower region composed of cells containing little chlorophyll and an upper stratum specialized for assimilation and transpiration.
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.
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.
Sometimes adaptations to protect the plant during seasons of drought, such as the rolling up of the thallus in many xerophytic Marchantiales, can be recognized, but more often a prolonged dry season is survived in some resting state.
It reproduced like the vegetable cryptogams, especially the Pteridophyta, having spore cases at the tips of the wings and evidently developing from a thallus or prothallus.
Squinting in the bruised light, Molly saw patches of a blackish thallus, flecked with green, growing on the trunk in crustlike forms.
As it flows it takes the forms of sappy leaves or vines, making heaps of pulpy sprays a foot or more in depth, and resembling, as you look down on them, the laciniated, lobed, and imbricated thalluses of some lichens.