Lokasi: Brazil. Estado da Bahia, Serra de Jatoba, Milagres, Morro de Couro (Morro Sao Cristovao), granite outcrop, 39 deg 52' W, 12 deg 54' S, alt. 500-600 m,6.3.1977.
Terrestrial herb with erect to decumbent, basally branching stems up to c. 1.5 m high.
Stem grey, naked except for apical leaf-bearing 20 cm, bearing annular scars of old cataphylls and suborbicular petiole scars, internodes up to 3 cm long, 2 cm thick, rapidly growing, widely-spreading, yellow-brown, normally unbranched adventitious roots, extending into and ramifying within leaf base reservoirs of neighboring Bromeliaceae or shaded litter.
Cataphylls 13.5-21.5 cm long, bicarinate, narrowly oblong-ovate, when furled up to 1.2 cm thick at base, narrowly conical, green , soon withering to red brown and deciduous.
Petiole 12.5-22 cm long, 0.7 cm thick just above sheath, tapering to 0.4 cm thick at apex, 1.1-1.6 times longer than median leaflet, adaxial surface flattened to somewhat convex with narrowly keeled margins, abaxial surface rounded, green, when subtending inflorescence basal sheath 3.5-4 cm long. Lamina of juvenile leaves simple, cordate, becoming sagittate to hastate, adult lamina compound, pedatipartate with 8-11 sessile leaves borne on 2 retrorsely-curving apical branches of petiole (crura), the central 3-5 leaflets inserted at widely-separated intervals, held sub-parallel and drooping, outermost leaflets inserted progressively closer together, held spirally, suberect. Leaflets on upper surface dark, more or less glossy green (glossy when dry), lower surface paler, more of less glossy (dull when dry), median leaflet 10-17 cm long, 2-5.5 cm broad, 3-4 times longer than broad, oblong-elliptic, apex acute to obtuse, ultimately short-apiculate, base subacute to rounded, margins very narrowly decurrent and continuous with those of adjacent leaflets forming narrow wing on distal face of crura, midrib rounded and prominent on both surfaces, excurrent apically into apiculum, primary lateral veins not differentiated, lateral veins fine, closely parallel, etched into upper surface, not prominent on lower surface but visible as dark green striae, minute reticulating veins visible when dry; other leaflets similar but progressively decreasing in size outwards, midribs not excurrent apically but evanescent before reaching ultimately rounded or unequal-sided leaflet apices.
Peduncle 3-4 cm long , 0.5 cm thick at the base, swelling to 1.5 cm thick at apex, green, all but apex enclosed in petiole sheath.
Spathe 10.5-14 cm long, basal half obliquely inserted on peduncle, convolute, 3 cm broad (when furled), green, apical half somewhat expanded in flower, outer surface green with membranous margins, sparsely covered with brown, glandular punctae, apex rounded with short, thickly conical cusp, in fruit entire spate convolute, basal half swelling considerably, eventually splitting open.
Spadix equal to spathe, in flower 10.5-11 cm long, basal pistillate portion 1-1.2 cm long, sterile, stminodal portion 5.5-5.8 cm long, 1.2-1.4 cm broad, apical staminate portion 3.7-4 cm long, 1.1 cm broad, in fruit pistillate portion enlarging considerably.
Pistil at antithesis 4-4.5 mm long, 2-3 mm broad, ovary green, 3-4 locular, each locule with 1-2 orthotropous ovules, placentation acile or sub-basal, stigma pale yellow, translucent, shallowly 3-4 lobed, densely and minutely tomentose, as broad as ovary. Staminodes opaque white, clustered in groups of 4-6, 2-2.5 mm long, 1.75-2.25 mm broad at convex apices, polygonal in transverse section, broadly clavate-obovate with narrow, stipitiform bases.
Stamens opaque white, 2.75 mm long, 1.75 x 0.75 mm broad at truncate apices, somewhat compressed laterally, suboblong, tapering slightly towards base.
Berries bright scarlet red, 0.8-0.9 cm long , 0.7-1.1 cm broad, rhombic in transverse section with persistent stigma.
Seeds peach-pink, 4-6 mm long, 3-4 mm broad, irregularly angled in transverse section.
Oleh: SJ Mayo dan Graziela M. Barroso
Dari: S. J. Mayo and Graziela M. Barroso (1979). A new predate-leaved species of Thaumatophyllum from Bahia, Brazil. Aroideana 2(3): 82-94