Philodendron Esmeraldense

Formally described by Thomas Croat and published in Aroideana in 2016, Philodendron esmeraldense is named for Ecuador's Esmeraldas Province in the humid northwestern lowlands where it was first documented — a hemiepiphytic climber endemic to the tropical wet forests and lower montane rainforests of Ecuador, growing as an appressed climber on tree trunks in the perpetually moist understory. The leaves are the defining character: extremely long, narrowly elongated, and broadly ovate to sagittate in overall form, reaching up to 50cm or more in length on well-grown climbing specimens while remaining relatively narrow in proportion — a slender, architectural silhouette distinct from the broad, rounded leaves of most collector philodendrons. The surface is semi-glossy to subtly velvety, deep emerald green with a prominently raised and rounded midrib from which heavily impressed lateral veins extend toward the leaf margins, creating a bold, almost sculptural venation pattern that gives each leaf a confident, structural presence. Juvenile leaves and new growth carry a striking bronze to burgundy-purple flush that matures to the rich emerald green of the adult leaf, and the abaxial underside retains a pale purple to burgundy tinge throughout — a two-tone quality that adds depth to the plant's visual character with every leaf movement. A vigorous climber that rewards vertical support with progressively larger and more dramatically formed leaves.

A moss pole or climbing trellis is strongly recommended — as a natural appressed climber, P. esmeraldense produces markedly larger, more characteristically elongated leaves as it ascends, and the full architectural quality of the venation is only revealed on well-developed climbing specimens. Provide bright indirect light; the species tolerates moderate light but produces the fastest growth and richest emerald coloration under consistent good indirect light. Water when the top 2" of medium approaches dryness in a chunky, well-draining aroid mix of orchid bark, perlite, and coco coir at a slightly acidic pH of 6.0-6.9. Humidity of 60-70%+ supports the best growth and cleanest leaf emergence. Maintain warm temperatures between 60-85°F. Toxic to humans and pets if ingested.