Pholidostachys amazonensis Henderson, 2012

Henderson, Andrew, 2012, A revision of Pholidostachys (Arecaceae), Phytotaxa 43, pp. 1-48 : 10-11

publication ID	https://doi.org/ 10.11646/phytotaxa.43.1.1
DOI	https://doi.org/10.5281/zenodo.4928328
persistent identifier	https://treatment.plazi.org/id/3F64C34F-FFF0-7213-FF6C-F44AFDF8FD6A
treatment provided by	Felipe
scientific name	Pholidostachys amazonensis Henderson
status	sp. nov.

Treatment

1. Pholidostachys amazonensis Henderson View in CoL , sp. nov. (Appendix IV, Plate 1)

It differs from other species in its spicate inflorescence and proximal lips of flower pits regularly shaped, rounded, not covering pits before anthesis, recurved.

Type:— PERU. Amazonas: Bagua Province, along roadside from Chiriaco to Puente Venezuela , 43 km (by road) NE of Chiriaco, ca. 1050–2400 ft., 5 November 1978, P. Barbour 4471 (holotype USM n.v., isotype MO!) .

Stems no data. Leaves number per stem no data; sheaths and petioles no data; rachises 42.0 cm long, 3.7 mm diameter; pinnae 6 per side of rachis; basal pinna no data; apical pinna length no data, 3.5 cm wide, forming an angle of 15° with the rachis. Inflorescences spicate, with a well-developed peduncle, absent rachis, and 1 rachilla, this arching at anthesis; prophylls and peduncular bracts woody, not covering rachilla at anthesis; prophylls and peduncular bracts no data; peduncles length no data, 3.2 mm diameter; rachilla 1, 18.7 cm long, 5.9 mm diameter; proximal lips of flower pits regularly shaped, rounded, not covering pits before anthesis, recurved; fruits no data.

Distribution and habitat. At 4°56’N and 78°10’W in Peru (Amazonas) at medium elevations in lowland rainforest ( Fig. 5 View FIGURE 5 ).

Taxonomic notes. For inflorescence bracts and proximal flower pit shape, Pholidostachys amazonensis shares the same character states as P. synanthera . Fruits are lacking on the single specimen available. However, inflorescences of the two are quite different. Pholidostachys amazonensis has spicate inflorescences with a well-developed peduncle, absent rachis, and 1 rachilla, this arching at anthesis. Pholidostachys synanthera has inflorescences branched 1–2 orders with a well-developed peduncle and rachis, and several rachillae, these spreading at anthesis.