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A petal fold starts with two connected flaps, each of which has at least two layers. (For example, two flaps of a preliminary base). The two flaps are attached to each other along a reference crease. Make two radial folds from the open point, so that the open edges lie along the reference crease. Unfold these two radial folds.
A cone clutch serves the same purpose as a disk or plate clutch; however, instead of mating two spinning disks, the cone clutch uses two conical surfaces to transmit torque by friction. [ 1 ] The cone clutch transfers a higher torque than plate or disk clutches of the same size due to the wedging action and increased surface area.
The inception and further development of petals show a great variety of patterns. [7] Petals of different species of plants vary greatly in colour or colour pattern, both in visible light and in ultraviolet. Such patterns often function as guides to pollinators and are variously known as nectar guides, pollen guides, and floral guides.
A mature female big-cone pine (Pinus coulteri) cone, the heaviest pine cone A young female cone on a Norway spruce (Picea abies) Immature male cones of Swiss pine (Pinus cembra) A conifer cone , or in formal botanical usage a strobilus , pl. : strobili , is a seed-bearing organ on gymnosperm plants, especially in conifers and cycads .
A single, large, upper petal is known as the banner (also vexillum or standard petal). The semi-cylindrical base of the banner embraces and compresses two equal and smaller lateral wings (or alae). The wings in turn enclose a pair of small keel petals, that are situated somewhat lower than the wings, but are interior to them. [1]
A rangoli on the occasion of Diwali, Goa, India A rangoli made with flowers on the occasion of Onam Rangoli at Delhi, India Rangoli is an art form that originates from the Indian subcontinent, in which patterns are created on the floor or a tabletop using materials such as powdered limestone, red ochre, dry rice flour, coloured sand, quartz powder, flower petals, and coloured rocks.
The outside of the tube and the petal lobes are almost glabrous but the inside of the tube is filled with woolly hairs. The petal lobes are rounded but have a small point in their centres. The 4 stamens are fully enclosed within the tube. The fruits are oval to cone-shaped, 7–9.5 mm (0.3–0.4 in) long and are woody with a papery covering. [2]
Conical spiral with an archimedean spiral as floor projection Floor projection: Fermat's spiral Floor projection: logarithmic spiral Floor projection: hyperbolic spiral. In mathematics, a conical spiral, also known as a conical helix, [1] is a space curve on a right circular cone, whose floor projection is a plane spiral.