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96 FIELDIANA: BOTANY, VOLUME 28 Philodendron duidae Steyermark, sp. nov. Planta terrestris; caudice crasso brevissimo; foliis basallbus; foliorum petiole erecto tereti, 40 cm.longo, 4-10 mm. crasso, deorsum dilatato; lamina coriacea perfoliata ovato-semiorbiculari vel cordatoovata, apice abrupte cuspidulata, basi cordata, 24-25 cm. longa, 16.5-18 cm. lata; lobo antico late ovato, inferne 16-17 cm., superne 7-10 cm. lato; lobis posticis paullo retrorsis rotundatis obtusis, 4-6 cm. longis, 5-6 cm. latis, ad 1/3-1/2 longitudinis connatis, nervis lateralibus numerosissimis aequaliter prominentibus tenuibus confertis; pedunculo 1.3 cm. longo, 1.2 cm. crasso; spatha subcoriacea ovato-lanceolata, apice acuta, infra medium constricta, 15.5 cm. longa, media 4.3 cm., basi 7 cm., prope apicem 2 cm. lata; spadice cylindrico, 10.8 cm. longo, 1.6-1.7 cm. crasso; inflorescentia foeminea quam mascula breviore, 3 cm. longa, 1.6 cm. crassa; pistillo depresso-cylindrico vel late oblongo, 1.5 mm. longo, stigmate 1.5 mm. lato rotundato paullo convexo coronata, 4-6-loculari, loculis pluribus tota longitudine loculorum insert is; inflorescentia mascula 7.8 cm. longa, 1.7 cm. crassa, parte superiore 2/3 sterili. Leaves basal, deep green above, dull green below, the numerous fine nerves equally prominent, subhorizontally spreading to ascending in middle portion, retrorse to descending in postical lobes, ascending towards apex, marginal nerve prominent, more strongly developed than others; inflorescence arising from center of plant; spathe yellow green, suffused with salmon at base, longer than spadix; spadix whitish; staminate inflorescence sterile above in upper 2/3, the parts of the sterile portion irregularly 4-6-angled, some of the margins somewhat crenate, fleshy, 1.5-2 mm. high, those in the upper half 1.2-1.5 mm. wide, those in lower part 2-3 mm. wide across the top (Fig. 13). Type in herb. Chi. Nat. Hist. Mus., collected among rock outcrops, Savanna Hills, summit of Cerro Duida, Territorio Federal Amazonas, alt. 1025-1200 m., September 2, 1944, Julian A. Steyermark 58225 (2 sheets). Same locality, Tate 830 (NY). Evidently a member of sect. Baursia, since all the nerves of the leaf blade are equal, dense, and close together. This species is remarkable in possessing perfoliate leaves, the basal lobes of the blade completely surrounding the petiole. The completely sterile upper 2/3 of the staminate inflorescence is also noteworthy. At the time this species was collected by Tate from the Savanna Hills, Krause indicated (Bull. Torr. Bot. Club 58: 321. 1931) that it would prove to be a new species, but did not describe it, because only the sterile specimen was available. It is fortunate that flowering material has been obtained subsequently. Philodendron Englereanum Steyermark, sp. nov. Planta terrestris et epiphytica; caudice crasso; foliorum petiolo erecto tereti, 38-44 cm. longo, 3-8 mm. crasso; lamina coriacea,
BOTANICAL EXPLORATION IN VENEZUELA - I 97 subtus glauco cordato-ovata, apice abrupte cuspidulata, basi profunde cordata, 28-30 cm. longa, 16-17 cm. lata; lobo antico late ovato, inferne 16.5-17 cm., superne 8.5-9 cm. lato; lobis posticis paullo retrorsis rotundatis obtusis, 5.5 cm. longis, 6.5-7 cm. latis, nervis lateralibus numerosissimis, omnibus subaequalibus confertis subarcuatis percursatis. FIGURE 13 Philodendron duidae Steyermark Blade and upper portion of petiole (X 1/2).
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o 2 CM XI E> RAR.Y OF THL UNIVERSIT
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FIELDIANA: BOTANY A Continuation of
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NUMBER 1 LIST OF ILLUSTRATIONS TEXT
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PAGE 67. Emmotum ptarianum 342 68.
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CONTRIBUTIONS TO THE FLORA OF VENEZ
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