"Hairs" on plants are properly called trichomes. Leaves can show several degrees of hairiness. The meaning of several of the following terms can overlap.
;Arachnoid, or arachnose: With many fine, entangled hairs giving a cobwebby appearance.
;Barbellate: With finely barbed hairs (barbellae).
;Bearded: With long, stiff hairs.
;Bristly: With stiff hair-like prickles.
;Canescent: Hoary with dense grayish-white pubescence.
;Ciliate: Marginally fringed with short hairs (cilia).
;Ciliolate: Minutely ciliate.
;Floccose: With flocks of soft, woolly hairs, which tend to rub off.
;Glabrescent: Losing hairs with age.
;Glabrous: No hairs of any kind present.
;Glandular: With a gland at the tip of the hair.
;Hirsute: With rather rough or stiff hairs.
;Hispid: With rigid, bristly hairs.
;Hispidulous: Minutely hispid.
;Hoary: With a fine, close grayish-white pubescence.
;Lanate, or lanose: With woolly hairs.
;Pilose: With soft, clearly separated hairs.
;Puberulent, or puberulous: With fine, minute hairs.
;Pubescent: With soft, short and erect hairs.
;Scabrous, or scabrid: Rough to the touch.
;Sericeous: Silky appearance through fine, straight and appressed (lying close and flat) hairs.
;Silky: With adpressed, soft and straight pubescence.
;Stellate, or stelliform: With star-shaped hairs.
;Strigose: With appressed, sharp, straight and stiff hairs.
;Tomentose: Densely pubescent with matted, soft white woolly hairs.
;Tomentulose: Minutely or only slightly tomentose.
;Villous: With long and soft hairs, usually curved.
;Woolly: With long, soft and tortuous or matted hairs.