Araceae
Anthurium ionanthum Croat
SUMMARY
Terrestrial or hemiepiphyte; internodes 2-16 cm long, 5-15 mm diam., medium green, matte, soon light gray-brown, very weakly glossy; cataphylls thin, 6-13 cm long, medium green, matte, marcescent, mostly deciduous or with a few pale fibers persisting. LEAVES drying green; petioles 10-66 cm long, 2-4 mm diam., subterete, narrowly and obtusely sulcate, medium green, matte, the margins bluntly acute; blades broadly ovate to ovate-lanceolate, cordate with deep lobes at the base, acute at the apex, thinly coriaceous, dark green and velvety above, moderately paler and matte below, 15-45 cm long, 10.5-27 cm wide, averaging 31 X 19 cm, 1.2-1.9 times longer than wide, .5-1.4 times as long as petioles, dark green and matte-subvelvety above, moderately paler and matte below; all veins moderately puberulent to granular-puberulent; midrib acute in deep valley, concolorous above (slightly paler towards base), narrowly round-raised and paler below; primary lateral veins 9-13 pairs, rising at an acute angle then spreading 40-45° angle, loop-connected to the connective veins, deeply and obtusely sunken, concolorous above, bluntly acute to narrowly round-raised and concolorous to slightly paler below; tertiary veins in part sunken above, raised below; collective veins arising from the 1st-3rd pair of basal veins, 3- 6 mm from margin; basal veins 5-8, first 2 free to base, the remainder coalesced to varying degrees and branching from the posterior rib; posterior rib broadly curved, naked 8-35 mm; sinus broadly hippocrepiform. INFLORESCENCES erect-spreading; peduncle terete, 11-51 cm long, 2-3 mm diam.; spathe medium green, to 7 cm long, 1.5 cm wide, promptly rolled and twisted, readily falling off; spadix weakly tapered to apex, initially pale yellow-green, matte, finally lilac, light purple or violet, 5-10 cm long, 4-8 mm wide, 10-14 times longer than broad, stipitate 1-9 mm. Flowers 6 visible per spiral, weakly 4-lobed, 2 mm wide in both directions; lateral 1-1.2 mm wide, the outer margins 2-3-sided, minutely papillate on magnification, matte; stamens .7 mm long, .5 mm wide, held just above the tepals and persisting, not retracting; pollen white. Berries not seen.