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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,