taxonID	type	description	language	source
038F8F6DFFB4FFB67C97FF2EFF2DFB0F.taxon	materials_examined	Type: — BRAZIL. Paraná: Alto Paraíso, Porto Figueira district, 23 ° 23 ’ 5.7 ” S, 53 ° 47 ’ 46.2 ” W, 04 February 2014, C. V. Buturi et al. 77 (holotype RB!, isotypes KEW!, MBM!, MO!, UNOP!). Rheophyte. Resin colourless. Stem decumbent, 0.5 − 1 cm in diameter; internodes 1.2 − 5 cm long, cylindrical, green to brownish, root 0.8 mm in diameter. Leaf prophyll 6.3 − 9 × 1.2 cm, whitish. Foliar sheath upright closed, 7 − 12.5 cm, short ligule projecting, up to 2 mm; petiole 0.3 − 3.1 × 0.1 − 0.3 cm, terete to canaliculated adaxially, green; leaf blade 16 − 31 × 6.7 − 9.5 cm, obovate to rarely elliptic, apex acuminate, base acute or attenuated, obscure primary lateral veins, discoloured, adaxial face opaque with lateral parallel lines dark green to brownish, chartaceous to sub-coriaceous. Inflorescence: 1 per floral sympodium; peduncle 3 − 5.5 × 0.3 − 0.5 cm, spathe 9 − 12 × 6 − 7.5 cm, elliptic, median constriction absent, partially closed during anthesis, green to whitish becoming yellow at anthesis, chartaceous; spadix 5 − 9.5 cm, staminate zone 3 − 6.2 × 0.5 − 0.9 cm, basal sterile male zone 0.3 − 0.8 × 0.9 cm; pistillate zone 1.5 − 2.7 × 0.7 − 1.1 cm, stipe of spadix 0.5 − 0.7 cm. Stamens 1.8 − 2 × 1.6 − 1.7 mm, whitish; basal staminodes 2 − 2.5 × 1.8 − 2 mm, whitish; gynoecium 2.4 − 3.6 × 2 − 2.3 mm, ovary 2.2 − 3.4 mm, whitish, stigma 0.1 − 0.2 mm, green to whitish, 3 – 4 locular, placentation axial, ovules many per locule, ovule 0.2 − 0.4 mm. Berries not observed. Phenology: — Flowers in February.	en	Buturi, Camila V., Temponi, Lívia G., Sakuragui, Cassia M. (2015): A new species of Philodendron subg. Pteromischum (Araceae) from the Paraná River, Brazil. Phytotaxa 202 (4): 284-288, DOI: 10.11646/phytotaxa.202.4.7, URL: http://dx.doi.org/10.11646/phytotaxa.202.4.7
038F8F6DFFB4FFB67C97FF2EFF2DFB0F.taxon	etymology	Etymology: — The specific epithet is a reference to the rheophytic habit of the plant, which is very rare in Philodendron, being described only in two species so far: P. flumineum and P. carajasense.	en	Buturi, Camila V., Temponi, Lívia G., Sakuragui, Cassia M. (2015): A new species of Philodendron subg. Pteromischum (Araceae) from the Paraná River, Brazil. Phytotaxa 202 (4): 284-288, DOI: 10.11646/phytotaxa.202.4.7, URL: http://dx.doi.org/10.11646/phytotaxa.202.4.7
038F8F6DFFB4FFB67C97FF2EFF2DFB0F.taxon	distribution	Distribution and habitat: — Philodendron rheophyticum occurs along the Paraná River in the Ilha Grande National Park, Alto Paraíso city, Paraná State, Brazil, located in a remnant of the Seasonal Alluvial Semideciduous Forest (Roderjan et al. 2002). Conservation: — Philodendron rheophyticum is endemic to Ilha Grande National Park and grows at the riverside of Paraná River. Although with a dense population, it was observed only in a portion of the river. This park belongs to the Paraná River Biodiversity Corridor and both suffer human interference by the presence of a hydroelectric dam. The discovery of this endemic new plant highlights the importance of conserving the fragile remnants of the Atlantic Forest. Paratypes: — Brazil. Paraná: Alto Paraíso, Ilha Grande National Park, 09 March 2013, C. V. Buturi et al. 06 (UNOP!).	en	Buturi, Camila V., Temponi, Lívia G., Sakuragui, Cassia M. (2015): A new species of Philodendron subg. Pteromischum (Araceae) from the Paraná River, Brazil. Phytotaxa 202 (4): 284-288, DOI: 10.11646/phytotaxa.202.4.7, URL: http://dx.doi.org/10.11646/phytotaxa.202.4.7
