FIG. 18. — Cyathea tsaratananensis C in A revision of the indusiate scaly tree ferns (Cyatheaceae, Cyathea subgen. Alsophila sect. Alsophila) in Madagascar, the Comoros and the Seychelles

FIG. 18. — Cyathea tsaratananensis C.Chr.: A, pinnules abaxially with a fragment of the costa, note that the sterile pinnule is more strongly crenate; B, leaf scars and trunk surface, form with close standing petioles; C, habit; D, leaf scars and trunk surface, common form; E, segment from the basal part of the petiole with scales; F, scales from the base of the petiole (left: strongly indurated, pyramidal scale; right: less strongly indurated scale); G, pinna abaxially with a fragment of the rachis, fertile in its lower half only. A, G, Rakotondrainibe et al. 5181 (P); B, Janssen et al. 2456 (P); C-F, Janssen et al. 2446 (P). Scale bars: A, B, D, E, 1 cm; C, 1 m; F, 0.1 cm; G, 5 cm.