Pinanga cupularis A.J.Hend., N.K.Ban & N.Q.Dung, Palms (1999+). 52: 64 (2008)

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Distribution

Map uses TDWG level 3 distributions (http://www.nhm.ac.uk/hosted_sites/tdwg/geogrphy.html)
Vietnampresent (World Checklist of Arecaceae)B
Vietnam in Kon Tum and Thua Thien-Hue and near Da Nang City. (Henderson, A., Khac Ban, N. and Quoc Dung, N. 2008. New Species of Pinanga (Palmae) from Vietnam. Palms 52(2): 63-69)A

Discussion

  • This species was identified as Pinanga paradoxa Scheff. by both Magalon (1930) and Gagnepain and Conrard (1937), who also recorded it from Lao. It differs from that species, occurring in Thailand and West Malaysia, in its cupular (versus imbricate) pistillate perianth and narrow fruits 0.2-0.4 cm (versus 1 cm) diameter. It is an unusual species of Pinanga in its staminate petals with long hairs on the apices, 4 stamens, cupular pistillate perianth, and homogeneous endosperm. Amongst Vietnamese species it most resembles P. kontumensis. It differs from this in its pendulous (versus erect) inflorescences, and cupular (versus free and imbricate) pistillate perianth. (Henderson, A., Khac Ban, N. and Quoc Dung, N. 2008. New Species of Pinanga (Palmae) from Vietnam. Palms 52(2): 63-69)A

Diagnosis

  • A speciebus omnibus Pinangae Vietnamensibus petalis florum staminatorum apice pilos longos ferentibus, staminibus 4, perianthio florum pistillatorum cupulari et endospermio homogeneo differt. (Henderson, A., Khac Ban, N. and Quoc Dung, N. 2008. New Species of Pinanga (Palmae) from Vietnam. Palms 52(2): 63-69)A

Biology And Ecology

  • In lowland or montane rainforest at 200-1400 m elevation. (Henderson, A., Khac Ban, N. and Quoc Dung, N. 2008. New Species of Pinanga (Palmae) from Vietnam. Palms 52(2): 63-69)A

Common Name

  • Cay cau rung se, ca nui (Henderson, A., Khac Ban, N. and Quoc Dung, N. 2008. New Species of Pinanga (Palmae) from Vietnam. Palms 52(2): 63-69)A

    Description

    • Stems clustered, rarely solitary, to 2 m tall, 0.4-0.8 cm diam., densely covered with reddish-brown scales. Sheaths closed, forming a crownshaft, 6.5-12 cm long, densely covered with reddish-brown scales; ocreas 1.5-2 cm long; petioles 3.5-6 cm long, green with whitish scales; rachis 11.5-40 cm long; pinnae 2-4 per side of rachis, falcate, not contracted at the bases, middle pinna 10-15 cm long, 1-3 cm wide at the middle, apical pinna 4.5-5 cm long, 2-4 cm wide at the middle, lobed, rarely blade undivided, then blade 21 cm long and 8 cm wide at the middle; veins only slightly raised adaxially. Inflorescences infrafoliar, pendulous; peduncles 0.1-0.2 cm long, 0.2 cm wide; prophylls 5-6.5 cm long; rachis absent; rachilla 1, 3-6.4 cm long, rectangular in crosssection, glabrous; triads distichously arranged; staminate flowers 11 mm long; sepals forming a 3-lobed, flat, membranous calyx, 1.5 mm long; petals 10 mm long, irregularly lobed at the apices, one petal larger than the other two, fleshy, with 2 mm long, hyaline hairs at the apices; stamens 4; pistillate flowers 2.5 mm long; calyx 2.5 mm long, cupular, not split into 3 sepals, ciliate at the apices; corolla similar to the calyx; ovary 2.5 mm long; fruiting calyx briefly and irregularly split at the apices; fruits 1.2-2 cm long, 0.2-0.4 cm diameter narrowly ellipsoid, slightly curved, color unknown; endosperm homogeneous. (Henderson, A., Khac Ban, N. and Quoc Dung, N. 2008. New Species of Pinanga (Palmae) from Vietnam. Palms 52(2): 63-69)A

    Materials Examined

    • Additional specimens examined. VIETNAM. DA NANG CITY: "Ba Na, près Tourane" [Hoa Vang District, Ba Na-Nui Chua Nature Reserve], 8 Jul 1923, Chevalier 6969 (VNM), no date, Magalon 8 (NY, VNM); Hoa Vang District, Ba Na-Nui Chua Nature Reserve, near summit, 15°59'N, 107°59'E, ca. 1100 m, 23 Apr 2007, Henderson et al. 3313 (HN, NY);. KON TUM: Dak Gley, about 12 km to N of Dak Gley town, near Mang Khen village, 1000-1200 m, 13 Nov 1995, Averyanov et al. VH 1655 (MO). THUA THIEN-HUE: Nam Dong Distr., Huong Son Commune, 16º09'N, 107º36'E, 300-450 m, 24 Mar 2005, Averyanov et al. HAL 6843 (HN); Phu Loc, Huong Loc, 2 Sep 1980, N. H. Nhan 880 (HN). (Henderson, A., Khac Ban, N. and Quoc Dung, N. 2008. New Species of Pinanga (Palmae) from Vietnam. Palms 52(2): 63-69)A

    Bibliography

    A. Henderson, A., Khac Ban, N. and Quoc Dung, N. 2008. New Species of Pinanga (Palmae) from Vietnam. Palms 52(2): 63-69
    B. World Checklist of Arecaceae