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

Primary tabs

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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
Endemic to Vietnam and known only from Dong Nai. (Henderson, A., Khac Ban, N. and Quoc Dung, N. 2008. New Species of Pinanga (Palmae) from Vietnam. Palms 52(2): 63-69)A

Discussion

  • Pinanga cattienensis differs from all previously described species of Pinanga from Vietnam by its leaf sheaths which do not form distinct crownshafts and inflorescences which are not infrafoliar. Instead the inflorescences push through the persistent, disintegrating, subtending leaf sheaths. In this it is similar to P. humilis, also described here. Pinanga cattienensis differs from P. humilis in its spirally (versus distichously) arranged triads, 90-95 cm long (versus 38-39 cm long) rachis and 9-13 (versus 5-7) pinnae per side of the rachis. (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 cognitis vaginis foliorum persistentibus reclusis, inflorescentiis interfoliaribus et triadibus spiraliter dispositis 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

  • Growing in seasonally flooded lowland forest at low elevations. (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, forming dense clumps of short stems to 0.5 m tall, sometimes to 1.5 m tall, 2 cm diam., green, covered with reddish-brown scales. Sheaths open, not forming crownshafts, 27-28 cm long, green with reddish-brown scales; ocreas present; petioles 87-116 cm long, green; rachis 90-95 cm long; pinnae 9-13 per side of rachis, linear, contracted at the bases, middle pinna 42 cm long, 2.5-3 cm wide at the middle, apical pinna 16.5 cm long, 5 cm wide at the middle, lobed; veins scarcely prominent adaxially. Inflorescences interfoliar, pushing through the persistent, disintegrating, subtending leaf sheaths, spreading; peduncles 0.5 cm long, 0.9 cm wide; prophylls 9-14 cm long, persistent and erect, splitting abaxially; rachis absent; rachillae 3-4, 9-13 cm long, rectangular in cross-section, glabrous; triads spirally arranged; staminate flowers 6 mm long; sepals forming a 3-lobed, flat, membranous calyx 1.5 mm long; petals 3, 6 mm long, triangular, fleshy, acute; stamens 20-22; pistillate flowers 2.5 mm long; calyx 2.5 mm long with 3, free, imbricate, scarcely ciliate, non-acuminate sepals; corolla similar to the calyx; ovary 2.5 mm long. Fruits 1.8-2 cm long, 0.5-0.6 cm diam., ellipsoid, red-pink; endosperm ruminate. (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. DONG NAI: Cat Tien National Park, road along Dong Nai river, 11°26'N, 107°26'E, 150 m, 28 May 2007, Henderson et al. 3410 (HN, NY). Possible additional specimen. Vietnam. Lam Dong: Bao Loc, Loc Lam, no date, Anon 1246 (LE). (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