Cuticular studies in some species of Mendoncia and Thunbergia (Acanthaceae)
1974
AHMAD, K.J.
The cuticular and epidermal anatomy of two species of Mendoncia (subfamily Mendoncioideae) and eight of Thunbergia (subfamily Thunbergioideae) has been studied. The species of Mendoncia are characterized by the presence of diacytic stomata on hypostomatic leaves, subsessile glandular hairs with a globular head, non-glandular hairs with a stellate hair-base, and the absence of cystoliths. In Thunbergia the cuticles show diacytic stomata on hypostomatic leaves, subsessile glandular hairs with a panduriform head, and non-glandular hairs with a two- or more-celled simple hair-base. Cystoliths are absent. The presence of diacytic stomata in all the investigated species of Mendoncia and Thunbergia, as well as in the other genera of the Acanthaceae, is considered as significant. The retention of Mendoncioideae and Thunbergioideae as subfamilies of the Acanthaceae is justified from the present investigation.
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