Amorphophallus urceolatus Hett.,A.Galloway & Medecilo, 2020

4. Amorphophallus urceolatus Hett.,A.Galloway & Medecilo View in CoL , sp. nov. — Plate 4 View Plate 4

Etymology. The specific epithet refers to the urn-shape of the spathe.

Type. M.P. Medecilo 623 (holo PNH 256731 ; iso DLSU-DH), Philippines, Luzon (Mt Palpag, Maragondon, Cavite), 13 June 2015 .

Tuber depressed globose, somewhat irregular with raised areas, no offset development, 6–12 cm diam, 4–8 cm high. Petiole 45–120 cm long, 3–9 cm diam, largely smooth, near the base slightly or strongly verruculate, blackish grey with smaller and larger, elongate elliptical whitish spots; lamina 60–120 cm diam, rachises winged above the basal branches; leaflets elongate elliptical, 1.5–15 cm long, 2.5–6 cm diam, upper side glossy green, lower surface glossy pale green, margin undulate, top long acuminate. Inflorescence solitary, short pedunculate, held at ground level. Spathe broadly oval, campanulate, 20 cm long, 25 cm diam, base convolute, separated from the limb by a shallow constriction, inside purple, verrucate with warts slightly separated, sometimes with a few short grooves, outside pale green with scattered whitish rounded spots; limb oblique to almost horizontal, inside basal part pale to mid green, margin or almost entire surface pale to dark purple, margin partly rolled inwards, more or less undulating, outside pale green with faint purplish hue to purplish with greenish vertical bands, entire surface with scattered, whitish, rounded spots and less numerous, small punctiform blackish green dots. Spadix shortly stipitate, 22.2 cm long, slightly shorter to slightly longer than the spathe; female zone cylindric, 2.8 cm long, 2 cm diam, flowers slightly distant, sometimes missing from the upper 0.5 cm; male zone subcylindric, with the base constricted, 3.5 cm long, 1.7 (base)–2.5 (top) cm diam, flowers congested; appendix narrowly to broadly fusiform-conical, 16 cm long, 3.5 cm diam just above the base, smooth, dark purple, gradually or more abruptly tapering to the top. Ovary depressed, 4 mm diam, 3 mm high, 2–3-locular, pale or dark purple with a whitish base; style 5 mm long, 1 mm diam, dark purple; stigma strongly or shallowly bilobed, 1.5 mm high, 3 mm diam (long axis), surface rugulose, yellow to dirty greyish brown. Male flowers with 3–5 stamens in lower part but indeterminable in the remaining part; stamen 2 mm long, 1.2 mm diam, off-white; filament free, 0.3 mm long, 1.2 mm diam; theca truncate, 1.7 mm long, 1.2 mm diam (long axis), pores slit-like, apical.

Distribution — This species can also be found in other parts of the Philippines. The following locations have all been mentioned to the authors by third parties and no collections have been made. The observations have been verified by the authors. Luzon Island (Rizal: Barras, Laguna: Mt Makiling, Cavite: Mt Palpag), Mindanao (General Santos City: K’laja karst).

Note — Of the four, short pedunculate species in the Philippines, A. urceolatus clearly resembles A. yaoi . It differs from the latter by the spadix being approximately as long as the spathe, by the much shorter and broader appendix and the stigma being shallowly or strongly bilobed.