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Ochna obtusata is a woody shrub or a small tree with glossy leaves. It has attractive yellow flowers, followed by seeds surrounded by bright red sepals. The bright red seed cup is as attractive as the flowers. The seeds are initially green, but turn jet black later. The red seed cup looks like the face of the Disney cartoon character Mickey Mouse.
Psammogeton involucratus is a flowering plant in the family Apiaceae. [2] It is grown extensively in South Asia, Southeast Asia, and Indonesia.Its aromatic dried fruits, like those of its close relative ajwain, are often used in Bengali cuisine but are rarely used in the rest of India.
Angiosperms are dealt with in more detail here; these structures are very different in gymnosperms. [7] In angiosperms, the specialised leaves that play a part in reproduction are arranged around the stem in an ordered fashion, from the base to the apex of the flower. The floral parts are arranged at the end of a stem without any internodes.
The primary leaf or leaves of a plant embryo which upon germination develops into the seed-leaf or the first set of leaves. craspedodromous Pinnate venation in which the secondary veins terminate at the margin s, often as teeth. crateriform In the shape of a saucer or shallow cup; hemispherical or more shallow. cremnophyte
The term angiosperm fundamentally changed in meaning in 1827 with Robert Brown, when angiosperm came to mean a seed plant with enclosed ovules. [ 35 ] [ 36 ] In 1851, with Wilhelm Hofmeister 's work on embryo-sacs, Angiosperm came to have its modern meaning of all the flowering plants including Dicotyledons and Monocotyledons.
The leaves are simple, alternate, oblong-lanceolate. [2] [3] The stunted branches end up with sharp ends making it look like thorns. [7] In India, this tree is mostly found near sandy riverine tracts and road cuttings. [2] This tree flowers between February and April and Fruits between March and May just in time before the rainy season starts.
The resulting meiospores develop into a gametophyte. Both the spores and the resulting gametophyte are haploid, meaning they only have one set of chromosomes. The mature gametophyte produces male or female gametes (or both) by mitosis. The fusion of male and female gametes produces a diploid zygote which develops into a new sporophyte.
Evolution of the angiosperms according to the Angiosperm Phylogeny Group (2013). The Angiosperm Phylogeny Group (APG) is an informal international group of systematic botanists who collaborate to establish a consensus on the taxonomy of flowering plants (angiosperms) that reflects new knowledge about plant relationships discovered through phylogenetic studies.