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The name hexafoil is sometimes also used to refer to a different geometric design that is used as a traditional element of Gothic architecture, [21] created by overlapping six circular arcs to form a flower-like image. [22] [23] The hexafoil design is modeled after the six petal lily, for its symbolism of purity and relation to the Trinity. [24]
X. australis takes several years to flower, and it does not always flower annually, but in the season after a bushfire it flowers prolifically. The flowers appear on a spear-like spike which can grow up to 2 metres (6.6 ft) tall. The flowers, with 6 petals, usually cover 1 ⁄ 2 – 5 ⁄ 6 of the stem.
At the top of the stem the flowers are arranged in a raceme, with the youngest flowers at the top. The flowers are in clusters of 1-3 and are a striking lilac blue to deep blue-purple colour. The flowers form a star-like shape made up of 6 petals between 6–9 mm (0.24–0.35 in) long, after flowering the petals become spirally twisted. [1]
The outer petals are fused over the bottom 1/3 of their length and are 24–35 by 8–13 millimeters. The inner petals are 2–4 by 1.5–2 centimeters with tips that come to a point. The outer surfaces of the petals are covered in white to yellow hairs up to 1.2 millimeters long, while the hairs on the inner surfaces are up to 0.5 millimeters ...
It has 3 oval, green, hairless sepals are 5-18 by 3-6 millimeters. The sepals have flat bases, pointed tips and wavy edges. Its flowers have 6 petals in two rows of three. The outer petals are white at their base, transitioning to yellow with red-brown highlights near their tips. The, hairless, oblong outer petals are 35-70 by 6-20 millimeters.
Floral diagram of Anagallis arvensis. [1]: 307 The dot represents the main axis, green structure below is the subtending bract.Calyx (green arcs) consists of five free sepals; corolla (red arcs) consists of five fused petals.
From centre outwards: Trilocular ovary, 6 stamens, 6 tepals Ornithogalum umbellatum , the garden star-of-Bethlehem , grass lily , nap-at-noon , or eleven-o'clock lady , a species of the genus Ornithogalum , is a perennial bulbous flowering plant in the asparagus family ( Asparagaceae ).
Its flowers are born on pedicels that are 2.5 centimeters long. Its 3 red, oval, ribbed, hairy sepals are 0.6 centimeters long. Its flowers have 6 petals arranged in two rows of three. Its red, leathery, oval to lance-shaped, hairy outer petals are 1.5 - 3.2 by 0.6-1.75 centimeters long. The margins of the outer petals are rolled back.