Phymatidium delicatulum var. delicatulum

De Brito, A. (2007). A Taxonomic Revision of the Genus Phymatidium (Orchidaceae: Oncidiinae). Kew Bulletin, 62(4), 529-560. Retrieved from http://www.jstor.org/stable/20443388

Morphology Reproductive morphology Inflorescences

Inflorescence up to c. 70 mm long

Morphology Reproductive morphology Flowers Calyx

Lateral sepals 2 - 4 x 0.3 - 0.8 mm, narrowly ovate to oblong-lanceolate, spreading, usually slightly falcate and weakly concave, acute to obtuse mucronate, abaxially weakly carinate Dorsal sepal 2.5 - 3.5 x 0.3 - 1 mm, usually concave towards base and somewhat hooded, narrowly ovate, ovate-triangular or oblong-lanceolate, acute to obtuse, abaxially weakly carinate

Morphology Reproductive morphology Flowers Corolla

Petals 2 - 3.5 x 0.5 - 1 mm, ovate-lanceolate, oblong-lanceolate or narrowly ovate, usually slightly oblique and obscurely falcate, acute to obtuse Lip 2 - 4 x 1.5 - 3.5 mm

Morphology Reproductive morphology Flowers Column

Column 1 - 3 mm long (excluding the tabula infrastigmatica), slightly sigmoid, slightly recurved towards apex; tabula infrastigmatica variable in shape and size, usually 0.5 - 1 x 0.5 - 1 mm, rarely inconspicuous, thick, solid, usually obovate trapeziform in outline from above, with a raised obovoid to ligulate (rarely sagittate) longitudinal callus in the middle.

Distribution

Argentina: Recorded for the Province of Misiones by Johnson (2001). Brazil: Rio Norte do Sul, Santa Catarina, Paraná, São Paulo, Rio de Janeiro, Espírito Santo, and Bahia.

Ecology

Epiphytic, usually on small branches of shrubs and trees near river margins in the forest. Also frequent in disturbed areas and orchard; recorded several times as an epiphyte on Psidium guajava L. (Myrtaceae) and other cultivated trees. Alt. 0 - 900 m.

Note

The shape of sepals, petals, lip and tabula infrastigmatica in this taxon is very variable. The variant illustrated has a sagittate tabula infrastigmatica and lanceolate-rhombic lip.