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Pubescence refers to the presence of small hairs or trichomes on the surfaces of plants. These structures can come in various forms, such as glandular or non-glandular, simple or branched, and straight or curved. The size, density, and shape of pubescence may vary between plant species.
This glossary of botanical terms is a list of definitions of terms and concepts relevant to botany and plants in general. Terms of plant morphology are included here as well as at the more specific Glossary of plant morphology and Glossary of leaf morphology .
Pubescent: With a hairy surface--there are many kinds of hairiness: Note: In the goosefoot family (Chenopodiaceae), many species have herbage covered by farinose (mealy) trichomes.
Generally, the hairy surface (indumentum) of a stem, leaf, calyx, or corolla is described as pubescent. The individual hair (trichome) is an outgrowth of the epidermis.
Pubescent: covered with short, soft hairs Punctate: dotted or pitted, often with glands Pulverulent: dusty or chalky, as applied to the powdery coating on the stems and leaves of some plants
Similarly, tomentose is a term used by some workers to denote the presence of trichomes, e.g. Jackson (1928) defined tomentum as ‘pubescence’. However, the term is more frequently used to denote a specific indumentum-type: ‘densely pubescent with matted wool, or short hairs’ (Jackson 1928).
pubescent: a somewhat dense covering of short, weak, soft hairs. Fig. 14 B. Fig. 14. Indumentum Types and Surface Appendages. A–H, surface and cross sectional views.
