Petal texture

The Sc phase exhibits four textures including the pseudo-homeotropic texture, the petal texture, the focal-conic texture and the lined texture (Gray and Goodby, 1984). The last occurs when the layer planes are not parallel to the surface. The lined appearance may be similar to what have been discussed for the cholesteric phase, but can also occur as being superimposed on the focal-conics. Examples of such lined and focal-conic... 

PetALOID Having the form, appearance, or texture of a petal. 

S ome of the common characteristics of night ades ate alternating, simple leaves that are often hairy in texture and may have a strong odor. The size and ape of the leaves, however, vary greatly within the family. The flowers of these plants generally have a tubular shape, oflen with five petals attached, as in the petunia. The stamens of the flowers are connected at their base. When the ovary of the flower matures into a fruit, it is either flediy like a tomato, or a dry fruit called a capsule, as in the tobacco plant. 

The Corolla.—The Corolla is the inner floral envelope, usually delicate in texture, and showing more or less brilliant colors and combinations of color. Its parts are called Petals, and when the calyx closely resembles the corolla in structure and coloring they are together called the Perianth. The purpose of these envelopes is to protect the reproductive organs within, and also to aid in the fertilization of the flower, as their bright colors, fragrance and saccharine secretions serve to attract pollen-carrying insects. 

Leaves show considerable variation in size, shape, arrangement of veins, type of attachment to the stem, and texture. They may be simple or divided into leaflets, i,e, compound (see illustration), Types of leaf include cotyledons (seed leaves) scale leaves, which lack chlorophyll and develop on rhizomes or protect the inner leaves of a bud foliage leaves, which are the main organs for photosynthesis and transpiration and bracts and floral leaves, such as sepals, petals, stamens, and carpels, which are specialized for reproduction. 

UNBAR. Long and narrow, the sides parallel or nearly so, as blades of most grasses LOBE. Any part or segment of an organ specifically, a part of petal or calyx or leaf that represents a division to about the middle MEMBRANOUS. Membtanaceous. Of parch-ment-fike texture... 

Sometimes the cores of deveioped coiumnar domains iie at right angles to the viewing direction and can be seen as extended straight lines (- clearly distinct from the hyperbolic disclinations present in the centre of focal conic units). They frequently occur along the centre of the principal dendritic spines in textures such as those shown in Fig. 1.26 - but, in contrast, in the columnar textures with petallike domains, they sometimes occur within a petal in alignments which bear no obvious geometrical relationship to the overall shape of the domain. 

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