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Marchantia is a genus of liverworts in the family Marchantiaceae and the order Marchantiales. The thallus of Marchantia shows differentiation into two layers: an upper photosynthetic layer with a well-defined upper epidermis with pores and a lower storage layer. The thallus features tiny cup-like structures called gemma cups, containing gemmae ...
Thallus of Marchantia polymorpha subsp. ruderalis showing dichotomous branching and gemma cups. It is a thallose liverwort which forms a rosette of flattened thalli with forked branches. The thalli grow up to 10cm long with a width of up to 2cm. It is usually green in colour but older plants can become brown or purplish.
Marchantia gemmae can be dispersed up to 120 cm by rain splashing into the cups. [26] In Metzgeria , gemmae grow at thallus margins. [ 27 ] Marchantia polymorpha is a common weed in greenhouses, often covering the entire surface of containers; [ 28 ] : 230 gemma dispersal is the "primary mechanism by which liverwort spreads throughout a nursery ...
Marchantiales is an order of thallose liverworts (also known as "complex thalloid liverworts") that includes species like Marchantia polymorpha, a widespread plant often found beside rivers, and Lunularia cruciata, a common and often troublesome weed in moist, temperate gardens and greenhouses.
Marchantia, an example of a liverwort (Marchantiophyta) An example of moss (Bryophyta) on the forest floor in Broken Bow, Oklahoma. Bryophytes (/ ˈ b r aɪ. ə ˌ f aɪ t s /) [1] are a group of land plants (embryophytes), sometimes treated as a taxonomic division, that contains three groups of non-vascular land plants: the liverworts, hornworts, and mosses. [2]
Non-vascular plants are plants without a vascular system consisting of xylem and phloem. Instead, they may possess simpler tissues that have specialized functions for the internal transport of water. [citation needed] Non-vascular plants include two distantly related groups: Bryophytes, an informal group that taxonomists now [update] treat as ...
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