FIG. 1 in Taxonomic significance of trichomes in the genus Acanthopsis Harv. (Acanthaceae, tribe Acantheae)

FIG. 1. — Trichome types (A1-G; illustrations labelled accordingly) found in Acanthopsis; as seen in surface view,unless indicated otherwise.A1 (bottom), non-glandular, unicellular trichome, A. glandulopalmata, leaf (Steyn 2125); A1 (top), optical section, A. horrida, leaf (Steyn 2121); A2, non-glandular, unicellular trichome, A. dregeana subsp. longispina, leaf (Steyn 2141); B, non-glandular, multicellular trichome, A. hoffmannseggiana Pofadder form, leaf (Steyn 1908); C, optical section, non-glandular, unicellular trichome,A. disperma, bract (Steyn 1845); D, non-glandular, multicellular trichome,A. villosa, leaf (Koekemoer 4398); E, glandular,uni- or multicellular trichome with or without 1-celled stalk, A. glandulopalmata, leaf (Steyn 2125); F, glandular, multicellular trichome with 2 (or 3)-celled stalk, A. glandulopalmata, leaf (Steyn 2125); G, glandular, multicellular trichome with 3-celled stalk and viscid head, A. hoffmannseggiana typical form, bract (Steyn 1915). Scale bar: 50 µm. Artist: Elizma Fouché.