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Tetrastigma is a genus of plants in the grape family, Vitaceae.The plants are lianas that climb with tendrils and have palmately compound leaves. Plants are dioecious, with separate male and female plants; female flowers are characterized by their four-lobed stigmas. [2]
The stigma, together with the style and ovary (typically called the stigma-style-ovary system) comprises the pistil, which is part of the gynoecium or female reproductive organ of a plant. The stigma itself forms the distal portion of the style, or stylodia, and is composed of stigmatic papillae , the cells of which are receptive to pollen.
Stigma (anatomy), a small spot, mark, scar, or minute hole; Stigma (botany), part of the female reproductive part of a flower; Pterostigma, a cell in the outer wing of insects; Eyespot apparatus, or stigma, a light-detecting organelle in cells
Flowers provide less food than other major plant parts (seeds, fruits, roots, stems and leaves), but still provide several important vegetables and spices. Flower vegetables include broccoli, cauliflower and artichoke. The most expensive spice, saffron, consists of dried stigmas of a crocus. Other flower spices are cloves and capers.
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The flowers of A. longipedunculata are yellow and, unusually for the genus, are borne on scapes up to 20 cm (8 in) high. A. grandiflora has spider-like flowers up to 12 cm (5 in) across. [ 5 ] The flower has a large stigma with a flattened top.
The stigma (from Ancient Greek στίγμα, stigma, meaning mark or puncture) is usually found at the tip of the style, the portion of the carpel(s) that receives pollen (male gametophytes). It is commonly sticky or feathery to capture pollen. The word "pistil" comes from Latin pistillum meaning pestle.
Its flowers have more than 100 yellow stamen that are 1 by 0.5-0.6 millimeters. Its flowers have up to 8 hairy carpels that are 1.2-1.5 by 0.4-0.6 millimeters. The carpels have 8-10 ovules arranged in two rows. Its stigma are shaped like narrow, inverted cones. Its fruit occur in clusters of up to 5-7 on woody pedicels that are 6-16 by 2.2-2.4 ...