FIG. 28. — A-F in A revision of the indusiate scaly tree ferns (Cyatheaceae, Cyathea subgen. Alsophila sect. Alsophila) in Madagascar, the Comoros and the Seychelles

FIG. 28. — A-F, Cyathea melanocaula Desv.; A, basal part of the leaf (from the petiole base up to the first several pinna pairs), basal part in lateral view, upper part in adaxial view, folded part in abaxial view; B, leaf scars and trunk surface; C, habit; D, scales from the base of the petiole (left: dorsal view; right: lateral view); E, pinnae abaxially with a fragment of the rachis, sori omitted from one pinna; F, pinnules abaxially with a fragment of the costa; G-K, C. obtecta Rakotondr. & Janssen; G, pinnae abaxially with a fragment of the rachis, sori only partly indicated; H, pinnules abaxially with a fragment of the costa; I, detail from the base of a pinnule, note the obliquely cup-shaped indusia and dense scaly indument on the costa and costula; J, scale from the base of the petiole; K, basal part of the leaf (from the petiole base up to the first pinna pair), lateral view, note the two pairs of aphlebioid pinnae near the base of the petiole. A-F, Janssen et al. 2608 (P); G-K, Rakotondrainibe 2524 (P). Scale bars: A, E, G, K, 5 cm; B, F, H, 1 cm; C, 1 m; D, 0.5 cm; I, J, 0.1 cm.