Abstract
Two ornamental new species of Sumateran Homalomena [Chamaecladon] are described: Homalomena anthurioides S.Y.Wong, P.C.Boyce & A.Hay and H. pexa S.Y.Wong, P.C.Boyce & A.Hay. These novelties represent a continuation of discoveries on Sumatera of species with uniquely, for Asia, highly elaborated epidermis.
Highlights
The existence on Sumatera of Homalomena Schott [Chamaecladon Clade] with extraordinarily ornamented leaf blades and/or petioles has been known since at least the 1920s, Alderwerelt (1922) having described three species with ornamented leaves: H. asperiifolia Alderw., H. cristata Alderw., and H. doctersii Alderw
The past decade has witnessed a marked increase in discovery of such species, among which are some of the most astonishing aroids yet described from the Malay Archipelago
Homalomena anthurioides is immediately distinguishable from all other described species by the very narrowly elliptic to falcate, stiff and brittle leaf blades held deflexed to almost 90° to the petioles, blades abaxially with alate primary lateral veins, and petioles with a pronounced apical geniculum
Summary
The existence on Sumatera of Homalomena Schott [Chamaecladon Clade] with extraordinarily ornamented leaf blades and/or petioles has been known since at least the 1920s, Alderwerelt (1922) having described three species with ornamented leaves: H. asperiifolia Alderw., H. cristata Alderw., and H. doctersii Alderw.
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