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An appendage derived from the protoderm in plants, including hairs and scales.
(invertebrate zoology)
A brightly colored tuft of hairs on the body of a myrmecophile that releases an aromatic substance attractive to ants.



in plants, an outgrowth of epidermal cells that varies in shape, structure, and function. (Deeper-lying tissues participate in the formation of emergences.) The most common trichomes are hairs and glumes. The long, soft hairs that cover cotton seeds are a valuable raw material for the textile industry. The structures of trichomes and their location on plant organs have taxonomic significance (for example, in the family Cruciferae).

References in periodicals archive ?
According to this author, glandular trichomes, consisting of an uniseriate multicellular peduncle and a multicellular secretory portion that is generally very colorful, are found in Cnestis, Connarus, Jollydora, Manotes, and Rourea; a second type of unicellular glandular trichome is characteristic of Manotes.
The trichomes of the Spirulina plantensis are multicellular, cylindrical without sheath and loosely or tightly coiled into more or less regular coils.
2 mm horizontal planes horizontally Leaf lamina 120 [micro]m thick 180[micro]m thick Epidermis and stomata 20 [micro]m in 25 x 20 [micro]m diameter in diameter Trichomes 250 [micro]m width 900 [micro]m length 80[micro]m width 250-400 [micro]m length Petiole 4 mm thick in 1 - 2 mm thick vertical plane vertically Vascular bundle 200x400 [micro]m in 350 x 400 [micro]m diameter in diameter Xylem 40- 80 [micro]m width 50 [micro]m or less Stem Metaxylem elements Metaxylem elements are 90 [micro]m in are 150 [micro]m diameter in diameter Root 1.
01 for leaf glossiness and trichome density on abaxial and adaxial leaf surfaces, except the mean squares for environments x CMS lines for trichomes on the abaxial leaf surface (Table 5).
Trichome length for the longest trichome varied from 68.
In addition, glandular trichomes on the leaf surface have been found to contain a complex mixture of sesquiterpenes ([C.
In addition, trichomes were found to be inducible, with increasing numbers on the new growth of damaged plants; however, costs of trichome production in other brassicaceous plants have not been detected, even in statistically powerful selection experiments ([dot{A}]gren and Schemske 1993).
caymensis the calyces are covered in long, sticky, capitate-glandular trichomes, as well as short, hooked, uniseriate trichomes (Fig.
Conclusions: The combination of characters like trichome type, ornamentation and wax deposition may be useful for recognizing the species of Senecio section Mulgediifolii.
leaf shape or trichome density) could potentially be modulated based on feeding preferences.