FIG. 6. — A, B in A revision of the indusiate scaly tree ferns (Cyatheaceae, Cyathea subgen. Alsophila sect. Alsophila) in Madagascar, the Comoros and the Seychelles

FIG. 6. — A, B, Cyathea decrescens Mett. ex Kuhn var. cristata Janssen & Rakotondr.; A, pinna abaxially with a fragment of the rachis, sori only partly indicated; B, pinnules abaxially with a fragment of the costula; C-E, C. decrescens var. manongarivensis Janssen & Rakotondr.; C, scale from the base of the petiole (left: lateral view, not to scale; right: dorsal view); D, fragment of the rachis abaxially, note the hyaline hairs being generally more than 10 cells long and having an indurated basal cell; E, pinnules abaxially with a fragment of the costula; F-J, C. decrescens var. quadrata (Baker) Janssen & Rakotondr.; F, pinna abaxially with a fragment of the rachis, sori only partly indicated; G, pinnules abaxially with a fragment of the costula, form of the Andasibe region, cf. "zakamenensis"-morphotype; H, pinnules abaxially with a fragment of the costula, "quadrata"-morphotype; I, pinnules abaxially with a fragment of the costula, "zakamenensis"-morphotype;J, pinnules abaxially with a fragment of the costula, "pilosula"-morphotype. A, B, Rakotondrainibe 3030 (P); C-E, Rakotondrainibe 1711 (P); F, G, Janssen et al. 2578 (P); H, Rasolohery 232 (P); I, van der Werff 12854 (P); J, Capuron 24 (P). Scale bars: A, F, 5 cm; B, E, G-J, 1 cm; C, D, 0.1 cm.