Published May 25, 2021 | Version v1
Taxonomic treatment Open

Eugenia pokkudanii A. M. Maya, K. M. Prabhukumar & V. Suresh 2021, sp. nov.

  • 1. Department of Botany, Government Victoria College, Palakkad (University of Calicut) - 67800, Kerala, India. & malukutty 7593 @ gmail. com; https: // orcid. org / 0000 - 0002 - 1626 - 9042
  • 2. Centre for Medicinal Plants Research (CMPR), Arya Vaidya Sala, Kottakkal, Malappuram- 676503, Kerala, India; (Present address: PDSH Division, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow. & prabhumkrishna @ gmail. com; http: // orcid. org / 0000 - 0003 - 3341 - 2717
  • 3. Department of Botany, Government College, Chittur, Palakkad (University of Calicut) - 678104, Kerala, India. & sojanchakkalackal @ gmail. com; https: // orcid. org / 0000 - 0002 - 9763 - 9251
  • 4. Department of Botany, Government Victoria College, Palakkad (University of Calicut) - 67800, Kerala, India. & sureshmagnolia @ gmail. com; https: // orcid. org / 0000 - 0001 - 7350 - 9236

Description

Eugenia pokkudanii A.M. Maya, K.M. Prabhukumar & V. Suresh, sp. nov. Figures 1–3.

Diagnosis:— Eugenia pokkudanii shows morphological similarities with E. discifera Gamble (1918: 239), but differs mainly by lateral nerves 6–8 pairs (versus 10–15 pairs in E. discifera), petioles 2–5 mm long (vs. 6–10 mm long), flowers 0.7–1 cm across (vs. up to 2 cm across), pedicels 0.3–0.56 cm long (vs. 0.5–0.9 cm long), bracteoles oblong (vs. lanceolate), calyx tubes 0.9–1.5 mm long (vs. 2–3 mm long), calyx lobes 1.6–2.5 mm wide (vs. 4–5 mm wide) and petals broadly elliptic (vs. orbicular). It is also similar to Eugenia indica (Wight 1842: 523) Chithra (1983: 153), but differs from it by its blades with 6–8 pairs of lateral veins (versus 5–6 pairs in E. indica), petioles 2–5 mm long (vs. 3–8 mm long), bracteoles oblong (vs. linear), calyx tubes 0.9–1.5 mm long (vs. 4–6 mm long), calyx lobes 1.6–2.5 mm wide (vs. ca. 5 mm wide) and petals broadly elliptic (vs. orbicular). See also Table 1.

Type:— INDIA. Kerala, Palakkad District, Nelliyampathy, Keshavanpara, 1002 m, 10°32’26.79” N, 76°40’49.23”E, 23 March 2019, A. M. Maya, K. M. Prabhukumar & Suresh V. GVCP-SV122 (holotype MH!, isotype CALI!).

Description:— Large shrubs to small trees, 2–4 m height; profusely branched; branches terete, rusty brown appressed, sparsely pubescent; branchlets terete, greenish brown, rusty brown appressed pubescent; internodes 1.5–2.2 cm long. Leaves coriaceous, petiolate; lamina elliptic, 1.5–6.3 × 0.5–2.5 cm, base cuneate to attenuate, margins entire slightly revolute, apex obtuse to rounded, adaxially green glabrous and abaxially silvery whitish green, sparsely rusty brown puberulent at middle and apex, brown appressed puberulent at leaf base, midvein not conspicuous; lateral veins 6–8 pairs; Petiole 2mm – 5mm long, slender, terete, green, rusty brown appressed tomentose. Inflorescences solitary or few-flowered, axillary or lateral. Flowers at anthesis 0.8–1.3 cm long × 0.7–1 cm in diameter, white, pedicellate; pedicels 3–5.6 × 0.3–0.9 mm, slender, terete, green, floccose rusty hairy; bracteoles 2, 1.6–1.9 × 0.4–0.5 mm, oblong, rounded at apex, green, floccose brown pubescent abaxially, white–brown appressed pubescent adaxially; hypanthium campanulate; calyx tube 0.9–1.5 × 1.5–1.7 mm, green, floccose brown pubescent; calyx lobes 4, 1.6–1.8 × 1.6–2.5 mm, orbicular to suborbicular, margin ciliate, rusty brown long hairs on abaxial side, floccose white pubescent adaxially; petals 4, broadly elliptic, 3–6 × 3.6–6.2 mm, margins entire, recurved at apex, pellucid, glabrous, white suffused with brown and purple stripes on abaxial side at tip. Androecium apostemonous; stamens extrorse, dithecous, numerous; staminal disk 3.2–4.6 mm in diameter, broad, fulvous white pubescent; filaments terete, 4.5–7 mm long, slender, white, gland-dotted, glabrous; anthers 2-celled, oblong, 0.6–0.7 × 0.55–0.6 mm, dorsifixed, yellowish brown and gland-dotted. Ovary 1.5–1.6 mm in diameter; style thick, 0.6–1.7 × 0.2–0.3 mm, gland-dotted; stigma entire; locules 2; ovules 2 in each locule, ovoid, 0.01–0.02 mm in diameter; placentation axillary. Fruits berries, ellipsoid, 0.9–1.3 × 0.5–0.9 cm, green when young and reddish orange when ripe, glabrous, crowned by the persistent calyx. Seeds 1–2.

Phenology:— February to April.

Etymology:— The species is named in honor of the late Mr. Kallen Pokkudan (1937–2015), an environmental activist from the state of Kerala, India, in recognition of his efforts for the protection and proliferation of the mangrove forests in Kerala.

Ecology:— The new species is known only from the type locality and grows as a small tree between 900 to 1000 m elev.

Paratypes:— INDIA. Kerala, Palakkad District, Nelliyampathy, Pothumala, 13 March 2019, A. M. Maya & Suresh V. GVCP-SV113 (MH!). Pothumala, 20 February 2020, A. M. Maya & Suresh V. GVCP-SV269 (CALI!). Keshavanpara, 21 February 2020, A. M. Maya & Suresh V. GVCP-SV270 (KFRI!).

Distribution and Habitat:— Semi-evergreen patches of Keshavanpara and Pothumala hills of Nelliyampathy forest, Western Ghats, Palakkad, Kerala, India.

Conservation status:— Eugenia pokkudanii is known only from the type locality. The extent of occurrence (EOO) of the species is estimated to be less than 1 km 2 and the area of occupancy (AOO) less than 50 m 2. Since the only extant locality is a tourist destination, it is possible to infer a reduction in the past of the potential habitat of the species. For this reason, the species can be categorized as Critically Endangered (CR) based on criteria B1 + B2 (a + bii + iii) (IUCN 2019).

Notes

Published as part of Manoharan, Maya Ammathil, Prabhukumar, Konickal Mambetta, Jose, Sojan & Veerankutty, Suresh, 2021, Eugenia pokkudanii (Myrtaceae): a new species from Sky Islands of Nelliyampathy, Kerala, India, pp. 283-288 in Phytotaxa 502 (3) on pages 283-286, DOI: 10.11646/phytotaxa.502.3.6, http://zenodo.org/record/5425119

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Linked records

Additional details

Biodiversity

Collection code
A, M , EOO, AOO, CR , IUCN , K, M , V, CALI, A, M , V, KFRI , V, MH, A, M , V, MH, CALI
Material sample ID
B1, B2 , GVCP-SV113 , GVCP-SV122 , GVCP-SV269 , GVCP-SV270 , IUCN 2019
Event date
2019-03-13 , 2019-03-23 , 2020-02-20 , 2020-02-21
Verbatim event date
2019-03-13 , 2019-03-23 , 2020-02-20 , 2020-02-21
Scientific name authorship
A. M. Maya, K. M. Prabhukumar & V. Suresh
Kingdom
Plantae
Phylum
Tracheophyta
Order
Myrtales
Family
Myrtaceae
Genus
Eugenia
Species
pokkudanii
Taxon rank
species
Taxonomic status
sp. nov.
Type status
holotype , paratype
Taxonomic concept label
Eugenia pokkudanii Prabhukumar, 2021

References

  • Gamble, J. S. (1918) Eugenia discifera. In Decades kewenses: Plantarum Novarum in Herbario Horti Regii Conservatarum. Decas XCI. Bulletin of Miscellaneous Information 7: 238 - 242. https: // doi. org / 10.2307 / 4118677
  • Wight, R. (1842) Jossinia indica. In: Icones plantarum Indiae Orientalis. Vol. 2. J. P. Pharaoh, Madras. 523 pp.
  • Chithra (1983) Eugenia indica. In: Nair, N. C. & Henry, A. N. (Eds.) Flora of Thamilnadu India. Ser 1, Analysis 1, Botanical Survey of India, Coimbatore. 153 pp.
  • IUCN (2019) Guidelines for Using the IUCN Red List Categories and Criteria, Version 14. Prepared by the Standards and Petitions Committee. Available from: http: // www. iucnredlist. org / documents / RedListGuidelines. pdf (accessed 20 November 2020)