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Affinities of Anthoceros with other members.

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Affinities of Anthoceros with other members. Anthoceros shows affinity with algae, members of Hepticopsida and Bryopsida of Bryophyta and Pteridophyta.The affinity and relationship of Anthoceros with green algae lies in the presence of a single large chloroplast together with a pyrenoid in cach cell of the gametophyte and in the formation of biciliated sperms. Anthoceros shows affinity with members of Hepaticopsida such as Riccia, Marchantia, etc. in the construction and structure of sex organs and in the apical growth of the thallus.It has affinity with members of Bryopsida i.e. Polytrichum, in the structure such as presence of columella, reduction of sporogenous tissue etc. and development of sporogonium. The spore production from amphithecium resembles the condition of that in Sphagnum. Anthoceros also shows sunken archegonium and development of antheridium from hypodermal initial cell like Pteridophyta. Highly developed sporophyte having photosynthetic tissue, functional stomata, i...
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Morphology of Psilotum

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Morphology of Psilotum 1. Introduction to Psilotum Psilotum belongs to the family Psilotaceae and order Ophioglossales of the vascular plant division (Pteridophyta). It is the only genus of the family Psilotaceae. In total, there are about 18 species of Psilotum belonging to the genus, out of which 2 occur in India viz., P. nudum and P. triquetrum. The plants of this genus are popularly known as whisk ferns, as they resemble the whiskers of some animals. Psilotum species are unique plants with small, leaf-like stems that absorb water and nutrients. They are classified as vascular plants with xylem and phloem, but lack most features common to vascular plants. Unlike other vascular plants, species of this genus do not have true leaves, roots or flowers. Instead of conventional green leaves, they have flattened photosynthetic branches that perform photosynthesis and help in the growth of new branches. Flora of Psilotum exist in two different forms. Some are terrestrial, found in rainfore...
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