(a) Blocky, Amaranthaceae, Celosia spp. Leaf. (b) Blocky, Fabaceae, Pterocarpus angolensis. Stem. (c) Blocky, Clusiaceae, Psorospermum febrifugum. Stem. (d) Blocky, Fabaceae, Pterocarpus tinctorius. Stem. (e) Blocky, Fabaceae, Pterocarpus angolensis. Stem. (f) Blocky, Ebenaceae, Euclea crispa. Stem. (g) Blocky, Clusiaceae, Psorospermum febrifugum. Stem. (h) Blocky, Clusiaceae, Psorospermum febrifugum. Leaf. (i) Blocky, Fabaceae, Brachystegia spp. Stem. (j) Blocky, Solanaceae, Solanum panduriforme. Leaf. (k) Blocky, Fabaceae, Piliostigma thonningii. Stem. (l) Blocky, Annonaceae, Annona senegalensis. Stem. (m) Blocky, Amaranthaceae, Celosia spp. Leaf. (n) Blocky, Rubiaceae, Pavetta crassipes. Stem. (o) Blocky cavate, Bignoniaceae, Kigelia africana. Stem. (p) Blocky corniculate, Cucurbitaceae, Cucumis spp. Rind. (q) Blocky facetate, Euphorbiaceae, Uapaca nitida. Stem. (r) Blocky hairy, Podocarpaceae, Podocarpus falcatus. Leaf. (s) Blocky pilate, Euphorbiaceae, Uapaca nitida. Stem. (t) Blocky polygonal, Apocynaceae, Ectadiopsis oblongifolia. Stem. (u) Blocky radiating, Fabaceae, Aeschynomene spp. Leaf. (v) Blocky trapezoid, Coniferophyta, Likualambuti. Leaf. (w) Blocky tuberculate, Solanaceae, Solanum panduriforme. Leaf. (x) Clavate granulate, Dipterocarpaceae, Monotes spp. Stem.