Multicellular multiseriate non-branched hairs occur on cumin fruit and on the tubular part of the corolla of calendula.
The hairs on cumin fruit vary considerably in size. All the hairs are spreading at the base and blunt or rounded at the apex. The cells forming the hair are narrow and the walls are thick. Three differently sized hairs are shown in Plate 10, Fig. 1.
The hairs of the base of the ligulate petals of calendula (Plate 10, Fig. 2) are biseriate. The hairs are very long and the walls are very thin.
Multicellular uniseriate branched hairs occur on the leaves of dittany of Crete, mullen, and on the calyx of lavender flowers.
The dittany of Crete (Plate 11, Fig. 3) hair is smooth-walled, and the branches are alternate.
In mullen (Plate 11, Fig. 1) the hairs have whorled branches, the walls are smooth, and the cell cavity usually contains air.
PLATE 10
Multicellular Multiseriate Non-Branched Hairs
1. Cumin (Cuminum cyminum, L.).
2. Marigold (Calendula officinalis, L.).
