Riccia

Riccia Structure and Reproduction Systematic position: Division : Bryophyta- The h unrivalledst grow are always absent, they lack vascular tissues and homosporous. stratum class Hepaticopsida: -Gametophyte dorsiventrally differentiated thallus, chloroplasts devoid of paranoids, rhizoids without septa. Order : Marchantiales- dorsoventral portion of thallus parenchymatous ,scales and rhizoids bow on the ventral side of thallus ,rhizoids savorless walled and tuberculate. Family Ricciaceae,: Rosette deal ,dichotomously weaponed thallus ,sex organs in the middledorsal groove,sporogonium bare(a) capsule and not differentiated into foot, seta, and capsule. .Genus: Riccia:- Thallus usually little potato like,scales look on the margins, assimilatory filamentous are vertical and un break uped. home ground or occurrence: The genus Riccia with about 200 species, is cosmopolitan in its distribution and ordinarily grows in moist soils especially during the afterwards rains .Abou t 29 species make believe reported from different split of India. Riccia belongs to the common Indian species are Riccia siliata, R. hitra, R. discolor, R. glauca, R. gan start upica, R. melansspora, R. hirta, R.crystallina absolute bulk of the species are terrestrial, a few are free adrift(p) or submerged aquatics e. g. R. fluitans, R. natans. The plant R. crystallina occurs at an meridian of 14,000 ft.

in Western Himalayas. External morphology(Gametophyte phase) In Riccia, the gametophytic plant consistency is the sovereign phase in the life cycle. The gametophyte is a prostrate, dorsi-ventrally flat, dichotomously branched, green, sonorous thallus. each(prenominal) branch i s either linear or wedge-shaped or obcordate! and as the dichotomous branches grow in concert from one place, the plant usually exhibits a shape of a rosette or a circular patch. Each branch is chummy in the median region and thin towards the margin. Each branch shows a conspicuous, longitudinal furrow along the mid a notch at the tip where the growing chief is located. On the ventral surface are present...If you want to get a full essay, order it on our website: OrderEssay.net

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