Philodendron grayumii Croat

Hemiepiphytic, appressed-climbing; internodes semiglossy to matte, 1--10 cm long, (2.5)3.5--7 cm diam., dark green to gray-green or tannish gray, drying brown to yellow-brown or reddish brown, epidermis closely ridged or fissured, sometimes peeling; roots usually 1--2 per node, ca. 3--4 mm diam., drying dark reddish brown; cataphylls thick, somewhat spongy, 11--26 cm long, unribbed to weakly 1-ribbed near apex or sharply flattened to sharply 2-ribbed, (ribs close), green, sometimes weakly maroon spotted, often persisting intact for a short time then deciduous, intact; LEAVES: petioles 40--97 cm long, 1--1.5 cm diam., subterete, firm, dark to medium green, obtusely and often weakly flattened near apex, sometimes weakly ribbed near apex adaxially, surface semiglossy, weakly and densely short pale green lineate, drying yellowish brown to dark brown, smooth to finely striate, sheath 6--15 cm long; blades ovate to broadly ovate, coriaceous to subcoriaceous, moderately bicolorous, semiglossy, acute to gradually or abruptly acuminate at apex, deeply cordate at base, (31)50--73 cm long, 24--44(58) cm wide ((0.7)1--1.9 times longer than wide), three-fourths as long as to somewhat longer than the petiole, upper surface dark green, drying dark brown toyellow-brown or grayish brown, semiglossy, lower surface conspicuously paler, drying yellow-brown, weakly to semiglossy; anterior lobe (25)31--49(60) cm long, (13)24--32(42) cm wide (2.3--4.6(8) times longer than posterior lobes), margins broadly rounded, sometimes sinuate; posterior lobes rounded to narrowly rounded, sometimes overlapping, (6)9--13(17) cm long, 12--18(22) cm wide; sinus hippocrepiform to oblong spathulate, obovate, or sometimes triangular to parabolic, rounded to narrowly rounded, (8)10.5--13 cm deep; midrib flat to broadly raised above, paler than surface above, convex to obtusely acute and sometimes purplish spotted below; basal veins 4--5(6) per side, with 1--2 free to base, third and higher order veins coalesced 3--6(8) cm long; posterior rib usually not naked, rarely naked for 1.5 cm; primary lateral veins 4--6 per side, departing midrib at a (45)55--70(75º) angle, ((45)55--70(75º) angle), downturned and splayed out when joining midrib, obtusely to narrowly sunken and paler than surface, sometimes weakly raised, drying weakly ridged near the midrib above, convex and paler than surface, sometimes reddish below; minor veins moderately indistinct, drying weakly prominulous (surface often with minute purplish raised areas seen on high magnification), arising from both the midrib and primary lateral veins, secretory ducts appearing as intermittent lines (less conspicuous on highland forms); INFLORESCENCES 1--5 per axil; peduncle (2)4--6 cm long, 1--1.5 cm diam., pale green, finely short-lineate; spathe (11)13--16(18) cm long, 2-3 cm diam. (2.1-2.6(3.5) times longer than peduncle), weakly constricted more or less above the middle, pale to medium green, sometimes whitish to pale yellowish toward apex, often tinged or spotted violet-purple throughout, especially near base, sometimes green dorsally with only the front edges of tube maroon, margins white, outer surface drying reddish brown throughout inside, violet-purple to maroon in lower one-half to two-thirds, especially in lower half; spathe tube 7--8.5 cm long, 2--3.6 cm diam., maroon to red, with pale lineations extending onto blade area inside; spadix sessile; cylindrical, 9.5--16 cm long, broadest above the middle or below the middle; pistillate portion pale green, cylindrical to weakly tapered toward the apex, 3.3--3.5 cm long, 4.6 cm long in front, 3.2--3.5 cm long in back, 9--20 mm diam. throughout; staminate portion 6.3--12.5 cm long; fertile staminate portion creamy white, cylindrical, 1--1.4 cm diam. at base, 1--1.4 cm diam. at middle, 8--10 mm diam. ca. 1 cm from apex, broadest at the base or at the base, broader than or as broad as the pistillate portion, sterile staminate portion usually not detectable; pistils 1.4--1.9 mm long, 0.8--1.1 mm diam.; ovary 7--8-locular, 1--1.4 mm long, 0.8--1 mm diam., walls thin and membranous, locules 1--1.3 mm long, 0.3--0.4 mm diam., ovule sac sometimes present, to 0.8 mm long, with sub-basal placentation; ovules (2)3--4(5) per locule, 2-seriate, contained within transparent, gelatinous ovule sac, 0.3--0.5 mm long, usually as long as funicle; funicle 0.2--0.3 mm long, (can be pulled free to base), style 0.5 mm long, 1.2 mm diam., similar to style type B; style apex sloping; stigma brushlike, sometimes cupullate, subdiscoid, unlobed, sometimes truncate or weakly domed, 0.9--1.3 mm diam., 0.2--0.6 mm high, covering entire style apex; the androecium truncate, prismatic, oblong, margins irregularly 4--6-sided, 0.9 mm long, 1.1 mm diam. at apex; thecae cylindrical to weakly ellipical, 0.3--0.4 mm wide, more or less parallel to one another; sterile staminate flowers trapezoidal to 4--6-sided, 1.1 mm long, 1.3 mm wide. INFRUCTESCENCE with peduncle to 11.5 cm long; spathe to 26 cm long, pistillate spadix to 13.5 cm long, 2.5 cm diam.; staminate spadix to 13.5 cm long; berries pale ochraceous, 3--3.3 mm long; seeds 1.9--2 mm long, 0.7--1 mm diam. PRE-ADULT petioles, sheathing throughout; blades oblong, subcordate, 26--31 cm long, 9--13 cm wide.