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Lithocysts, trichomes, hydathodes and stomata in leaves of Pilea cadierei Gagnep. and Guill. (Urticaceae).
by Smith D. L., Watt W. M. (1986)
in Annals of Botany 58: 155–166. – DOI:https://doi.org/10.1093/oxfordjournals.aob.a087193
Anisocytic stomata, which also occur in the lower epidermis, show a clumped distribution pattern that results from their relatively late formation after cell division in the epidermis is otherwise complete, and from the inhibitory influence of established lithocysts, trichomes and anomocytic stomata.
Ordered spacing of anisocytic stomata within groups probably results from mutual inhibition between initial cells at the time of inception.
Lithocysts associated with primary and secondary veins are elongated along the vein axis. Elsewhere in the leaf lithocyst, orientation is oblique relative to the midrib and shows a correlation with vein orientation around the time of lithocysts elongation.