Pholidostachys synanthera (Mart.) Moore (1969: 231)

Henderson, Andrew, 2012, A revision of Pholidostachys (Arecaceae), Phytotaxa 43, pp. 1-48 : 16

publication ID

https://doi.org/ 10.11646/phytotaxa.43.1.1

DOI

https://doi.org/10.5281/zenodo.4928358

persistent identifier

https://treatment.plazi.org/id/3F64C34F-FFF6-7216-FF6C-F38AFA8EFAA4

treatment provided by

Felipe

scientific name

Pholidostachys synanthera (Mart.) Moore (1969: 231)
status

 

7. Pholidostachys synanthera (Mart.) Moore (1969: 231) View in CoL .

Geonoma synanthera Martius, 1823 View in CoL –1837: 13. Calyptrogyne synanthera (Mart.) Burret, 1930: 137 View in CoL . Calyptronoma synanthera (Mart.) Bailey, 1938: 166 View in CoL . Type:— PERU. Huánuco: Chicoplaya, no date, H. Ruíz & J. Pavón s. n. (holotype M n.v., isotype F!).

Stems 3.3(1.0–6.0) m long, 5.6(3.0–22.0) cm diameter, solitary. Leaves 15(4–27) per stem; sheaths 32.8(15.0–74.0) cm long; petioles 70.1(24.0–136.0) cm long; rachises 84.0(48.0–124.0) cm long, 8.1(3.6– 12.6) mm diameter; pinnae 10(4–18) per side of rachis; basal pinna 49.6(26.5–67.5) cm, long, 1.7(0.2–7.6) cm wide, forming an angle of 50(27–72)° with the rachis; apical pinna 45.0(23.0–65.0) cm long, 10.5(2.5–22.5) cm wide, forming an angle of 15(9–24)° with the rachis. Inflorescences branched 1–2 orders, with a welldeveloped peduncle and rachis, and several rachillae, these spreading at anthesis; prophylls and peduncular bracts woody, not covering rachillae at anthesis; prophylls 38.0(25.5–55.0) cm long; peduncular bracts 32.1(19.0–41.0) cm long, inserted 8.6(5.0–12.5) cm above the prophyll; peduncles 44.8(20.0–70.0) cm long, 11.4(5.3–19.1) mm diameter; rachilla 12(4–25), 28.5(14.0–56.0) cm long, 6.1(3.7–10.3) mm diameter; proximal lips of flower pits regularly shaped, rounded, not covering pits before anthesis, recurved fruits scarcely compressed, ellipsoid, with obscure longitudinal ridges, 14.3(10.2–17.7) mm long, 8.4(6.1–10.5) mm diameter.

Taxonomic notes. Pholidostachys synanthera is the most widespread species in the genus.

Subspecific variation. There are three geographically separate populations of Pholidostachys synanthera . One occurs at 146(90–250) m elevation in the western Amazon region; the second on eastern Andean slopes at 1040(400–1620) m elevation; and the third on the Cordilleras Central and Oriental in Colombia at 1206(550–1750) m elevation. Only three variables (rachis length, number of divisions, apical pinna angle) are significantly different between the two Andean populations (t -test, P <0.05), and they are here treated as one. Between this expanded Andean population and the Amazon population, 11 variables (stem height, stem diameter, leaf number, rachis length, rachis width, number of divisions, basal pinna length, basal pinna angle, apical pinna length, apical pinna width, rachillae width) are significantly different (t -test, P <0.05). Most of these variables are from stems and leaves, and only one from inflorescences. Based on these results, Amazon and Andean populations are recognized as subspecies (subspp. robusta , synanthera ).

Kingdom

Plantae

Phylum

Tracheophyta

Class

Liliopsida

Order

Arecales

Family

Arecaceae

Genus

Pholidostachys

Loc

Pholidostachys synanthera (Mart.) Moore (1969: 231)

Henderson, Andrew 2012
2012
Loc

Calyptronoma synanthera (Mart.)

Bailey 1938: 166
1938
Loc

Calyptrogyne synanthera (Mart.)

Burret 1930: 137
1930
Loc

Geonoma synanthera

Martius 1823
1823
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