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Flower bud of a Capsicum pubescens plant, with many trichomes Fossil stellate hair (trichome) probably of an oak, in Baltic amber; image is about 1 millimetre (1 ⁄ 32 inch) wide. Trichomes ( / ˈ t r aɪ k oʊ m z , ˈ t r ɪ k oʊ m z / ; from Ancient Greek τρίχωμα ( tríkhōma ) ' hair ') are fine outgrowths or appendages on plants ...
Stiff hairs or trichomes without the ability to inject irritating compounds occur on the leaves and stems of many plants. They appear to deter feeding insects to some degree by impeding movement and restricting access to the surface of the stem or leaf. Some plants have glandular hairs, either as well as non-glandular hairs or instead of them.
Prickles on a blackberry branch. In plant morphology, thorns, spines, and prickles, and in general spinose structures (sometimes called spinose teeth or spinose apical processes), are hard, rigid extensions or modifications of leaves, roots, stems, or buds with sharp, stiff ends, and generally serve the same function: physically defending plants against herbivory.
Although trichomes are used for protection, they can be disadvantageous for plants at times because trichomes may reflect light away from the plant that can be used to photosynthesize. [2] The cuticle is a layered structure of waxes and hydrocarbons located on the outer layer of the epidermis which also helps protect the plant from stress. [2]
1. (of a flower) The period during which pollen is presented and/or the stigma is receptive. 2. (of a flowering plant) The period during which flowers in anthesis are present. Not defined for some cases, such as when pollen is released in the bud. anthocarp
Flowers of Malvaceae s.l. exhibit nectaries consisting of densely arranged multicellular hairs resembling trichomes. In most of Malvaceae s.l., these trichomatous nectaries are located on the inner surface of the sepals, but flowers of the subfamily Tiliodeae also have present nectaries on the petals. [20]
The species name canscens means "white with age", referencing the short, white hairs that cover the plant. [5] The common name "hoary puccoon" also references the short, white trichomes on the plant, as hoary also means "white or grey with age, and the word "puccoon" comes from a Native American word meaning "a plant that yields a pigment". [5]
Inflorescences 2.5–5.3 cm long, with pedicels 1.5–4 mm long, flowers cream, yellow, yellow-green or reddish; calyx cup-shaped, basally with hispidulous, rusty, short and thick trichomes mixed with glandular-tipped trichomes and apically granular, apex truncated; corolla in bud 1.5–2.5 mm long, glabrous to papillate (puberulent), apex rounded.