Chrysosplenium arunachalense Bhaumik

First published in Kew Bull. 69(1)-9491: 1 (2014)
This species is accepted
The native range of this species is Arunachal Pradesh. It grows primarily in the subalpine or subarctic biome.

Descriptions

Bhaumik, M. 2014. Chrysosplenium arunachalense (Saxifragaceae), a new species from India. Kew Bulletin 69: 9491. DOI https://doi.org/10.1007/s12225-014-9491-3

Type
Type: India, Arunachal Pradesh, West Siang, Renu II Pass beyond Yourlung (28°43.457'N, 93°54.673'E), 3438 m, 8 Sept. 2012, M. Bhaumik 29419 (holotype CAL; isotype ARUN).
Morphology General Habit
Tufted perennial, herbs, 15 – 22 cm tall, glabrous throughout
Morphology Leaves
Basal leaves 6 – 18, fleshy; petiole 4 – 6 cm × 0.7 – 1 mm; blade longer than broad, oblong to elliptic-oblong, 9 – 27 × 6 – 13 mm, base cordate, apex rounded, margin with 4 – 7 crenulate lobes on each side, symmetrical, abaxial surface dark green, adaxial surface paler, veins not distinct
Morphology Stem
Stem leaves 1 – 4, alternate, evenly-spaced; petiole 7 – 11 mm long; blade elliptic, 7 – 10 × 3 – 6 mm, base cuneate, apex rounded, margin 3 – 6 lobed, each axil bearing a new plantlet Flowering stems 1 – 3, suberect, 6 – 20 cm long; bracteal leaves oblong, ovate-elliptic, 5 – 10 × 4 – 6.5 mm, apex rounded, base truncate or rounded to cuneate, margins with 3 – 4 crenulate lobes; petiole 1 – 3 mm long
Morphology Reproductive morphology Inflorescences
Inflorescence terminal; cymes 3 – 15-flowered, 1 – 2.5 cm long
Morphology Reproductive morphology Flowers
Flowers 1.8 – 3 × 4 – 8 mm
Morphology Reproductive morphology Flowers Calyx
Sepals 4, fleshy, erect, greenish yellow, oblong, 1 – 1.8 × 1 – 2 mm, not overlapping, margin entire, apex truncate, emarginate
Morphology Reproductive morphology Flowers Corolla
Petals 0
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 8, longer than sepals; filament 1.8 – 2.5 mm long; anther c. 0.6 mm long
Morphology Reproductive morphology Flowers Gynoecium Carpels
Carpels 2; ovary semi-inferior; styles c. 1 mm long; disc 2 – 3.5 mm diam., unlobed or obscurely lobed
Morphology Reproductive morphology Fruits
Capsule 1.5 – 2 × 4 – 6 mm, apex subtruncate; lobes subequal, divergent; rostrum c. 0.5 mm long
Morphology Reproductive morphology Seeds
Seeds 15 – 30, ellipsoid, c. 1.2 × 0.4 mm, smooth, shiny, purplish-brown
Note
Similar to Chrysosplenium forrestii and C. nudicaule but differs in a leaf blade longer than broad, stem and petiole glabrous, sepals erect not overlapping, and stamens longer than sepals. The specific epithet is derived from its geographical origin, namely Arunachal Pradesh.
Distribution
India: Arunachal Pradesh.
Ecology
Stream-side on open alpine slopes associated with Juncus spp., Saxifraga spp., Corydalis sp., Kobresia sp. and Geranium sp.
Conservation
This new species very localised in distribution, in small populations. Its true status cannot be defined until further information regarding other localities is available. The species grows in the primary forest of Arunachal Pradesh far from any human habitation. There are no immediate threats to its survival. However, only two patches of 10 – 15 individuals each were seen during this exploration work. According to the IUCN Red List Categories and Criteria (IUCN 2012), this species is currently evaluated as Data Deficient (DD).
Phenology
Flowering & fruiting July – September.
[KBu]

Sources

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Bulletin

    • Kew Bulletin
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0