Journal of Threatened Taxa |
www.threatenedtaxa.org | 26 May 2020 | 12(8): 15962–15966
ISSN 0974-7907 (Online) | ISSN 0974-7893
(Print)
doi: https://doi.org/10.11609/jott.5354.12.8.15962-15966
#5354 | Received 21 August 2019 | Final
received 11 April 2020 | Finally accepted 25 April 2020
Henry’s Rattan Calamus henryanus Becc. (Arecaceae), a new record to India
Selim Mehmud
1 & Himu Roy 2
1,2 Department of Botany, Cotton
University, Panbazar, Guwahati, Assam 781001, India
1 mehmudselim@gmail.com
(corresponding author), 2 dr.himuroy@gmail.com
Editor: P. Lakshminarasimhan,
Botanical Survey of India, Pune, India. Date
of publication: 26 May 2020 (online & print)
Citation: Mehmud,
S. & H. Roy (2020). Henry’s Rattan Calamus henryanus Becc. (Arecaceae), a new record to India. Journal of Threatened Taxa 12(8): 15962–15966. https://doi.org/10.11609/jott.5354.12.8.15962-15966
Copyright: © Mehmud & Roy 2020. Creative
Commons Attribution 4.0 International License.
JoTT allows unrestricted use, reproduction,
and distribution of this article in any medium by providing adequate credit to
the author(s) and the source of publication.
Funding: Self-funded.
Competing interests: The authors declare no competing interests.
Acknowledgements: We are thankful to the principal chief conservator of
forests (WL) & chief wildlife warden, Assam, Panjabari,
Guwahati; head of the Department of Botany, Cotton University for providing lab
facilities; director of Botanical Survey of India for herbarium consultation
and library facilities both in CAL and ASSAM.
We are also thankful to authorities of Kew and New York Botanical Garden
for online images of the herbarium sheets and Kangkan
Kumar Das for his assistance in the field.
Further we also acknowledge Dr. John
Dransfield (honorary research fellow, Herbarium Royal Botanic Gardens Kew) and Dr. Andrew Henderson (New York Botanical Garden) for
confirming the identity of the species.
We are also thankful to The Threshold Geospatial Institute, Guwahati for
preparing a map of the study area.
The genus Calamus L. is the largest group of Arecaceae, represented by 520 species and distributed in OW
tropics especially Malesia (Mabberley 2017). Out of 48 species of Calamus in India,
47 were reported by Renuka et al. (2010) and one more species by Mandal et al.
(2019). While exploring the Barak valley
of Assam, an interesting species of Calamus viz., Calamus henryanus Becc. was collected
from Bhuban Hill of Cachar
District located in the southern part of Assam (Figure 1). This species is a new record to the flora of
India as it has not been reported in any of the works on rattans in India (Basu 1992; Biswas & Dayal
1995; Renuka 1999; Rahman 2007; Barooah & Ahmed
2014). This species is known to occur in
China, Thailand, Laos & Vietnam (Evans
et al. 2002), and Myanmar (Henderson et al. 2018).
Standard method (Jain & Rao 1977; Dransfield 1986)
for collection of specimens and herbarium preparation was followed and
preliminary identification of the specimen was done on the basis of careful
taxonomic analysis and survey of literature (Beccari
1908; Henderson 2009; Peters & Henderson 2014). The identity of the species was confirmed
through online herbaria Kew Herbarium Catalogue (K) and New York Botanical
Garden (NYBG). The website Palm Web was
also consulted. The specimens have been
deposited in the departmental herbaria of Cotton University (Image 2) and a
duplicate was submitted in ASSAM (Accession No. 95113, 95114). Taxonomic description along with photographs
(Image 1 & 2), habitat, examined specimens and a note is provided to
facilitate its easy identification.
Calamus henryanus Becc., Rec. Bot. Surv. India 2:199.1902.
Clustered climbing rattan, 6–8 m tall; stem 10–12 mm
across including sheath and 8–9 mm excluding sheath, leaf sheath of young stem
is covered by brown indumentum, mature stem green; spines triangular, brown,
0.3–2.5 cm long, comparatively more dense and longer below the knee. Internodes
10–12 cm. Knees 2.5–3×0.6–0.7 cm, armed
or unarmed, light green to yellow, surface smooth or with brown
indumentums. Ocrea inconspicuous, 1–2 mm
long, unarmed. Flagella 1.3–1.5 m, base c. 5×3 mm, armed by 2–3 mm spines. Leaf ecirriate,
1–1.1 m long, abaxially armed by 2–3 mm spines, adaxially rachis unarmed. Petiole 28–30 cm with triangular adaxial
spines 4--–5 mm. Leaflets 30–46 per
side, regular, alternate and opposite, in equidistant, linear to ensiform,
basal longest leaflets 30–33×2 cm, mid region leaflets 26–28×1.3 cm, terminally
free 14–16×0.5–0.6 cm, 5–nerved, acute to long acuminate at apex; bristles 2mm
long, brown, crowded abaxially, few and restricted to the vein adaxially. Inflorescence flagellate, prophyll 18–20 cm
long, tubular; partial inflorescence with splitting, dry or tattering bract;
long one at base; terminal rachilla is two to three times longer than
others. Staminate
inflorescence 3–3.5 m long with 5–7 nos. partial inflorescences 7–23 cm long;
flagella 25–30 cm long, armed. Rachillae 2–4 cm long,
alternate, slightly bent or straight. Staminate
flower ovate c. 3×2 mm; calyx c. 2mm long, connate, green; corolla c. 3mm long,
free, ovate; six stamens, c. 3mm long; filaments linear, 2mm long, anthers
bi–lobed, 2mm long, fertile, yellow; pistillode c. 1mm
long, trifid. Pistillate inflorescence
1.5–1.8 m long, partial inflorescences 2–4 nos. 4–23 cm long; flagella 80 cm
long, densely armed. Rachillae
1–4 cm long; dyad alternately arranged. Pistillate flower c. 3×1 mm, ovate;
calyx connate, tip villose; corolla free c. 2×1.5 mm
long, ovate, light green; six staminodes, c.1mm long, staminodal
ring c. 2mm long with six tips; gynoecium c. 2mm long; ovary tri-carpellary; style short; three stigmas. Neuter flower oblique or ovate, c. 2mm long;
pedicel c. 0.5mm long; perianth same as pistillate flower; five staminodes, c.
1mm; filaments linear, free, c. 0.5mm long; pistillode
bifid, c. 1mm long. Immature fruit ovoid 5×3 mm.
Flowering:
November–January; Fruiting: February onwards.
Habitat: The
species was found in association with Alpinia
spp. Bambusa spp., Bauhinia acuminata L., Mesua
ferea L., Mikania micrantha
Kunth, Calamus erectus Roxb.,
Saraca asoka (Roxb.) de Wilde., and Licuala peltata
Roxb. ex Buch-Ham. at an elevation up to 704m on
slopes and shady areas.
Specimen examined: #69 (Image 2A), 10.xi.2018, India, Assam: Bhuban Hill, Cachar District,
24.6440N; 93.1440E, 704m, coll. S. Mehmud;
#116 (Image 2B), 23.iii.2019, 24.6480N; 93.0070E,
112m, coll. S. Mehmud (Department of Botany, Cotton
University; ASSAM); NQD 2023, Vietnam, Ha Giang
Province, Quang Binh
District, Vinh Hao State Forestry Company, Compartment 9, Block 301,
Coordinates 482386 & 2470188, 134m, 16.x.2019, Nguyen Quoc Dung and Le Manh Tuan (NYBG barcode 01204787!); #1967, 22.xi.2003, Myanmar, Mon State, Kyaikto, Mt. Kyaikhtiyo, 17.4790N,
97.0930E, 900m, D.R. Hodel (NYBG barcode 02390385!).
Note: The leaf of
the specimens examined was found with regular leaflets while the presence of
both regular and interrupted leaflets are known to occur in the species (Evans
et al. 2002). The collection site
located in the Bhuban Hill is 44–50 km away from the
district headquarters at Silchar. Occurrence of the species was noted in a few
spots and was within a range of around 7–9 km.
A total of five populations with around 17 individuals were observed in
the study area. Three populations out of
five were observed near roadsides. The
cane was found to be utilized by local people for preparation of furniture and
domestic uses, which probably shrinks its occurrence in the study area. As the study area shares a border with
Manipur, Mizoram, and Tripura, therefore, there are chances of occurrence of
the species in these states of northeastern India.
For
figure & images - - click here
References
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new species from the eastern Himalaya, India. Journal of Threatened Taxa
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Corrigendum
Citation: Pawar. D., H.P. Nelson, D.R.L. Pawar & S. Khanwilkar (2019).
Estimating Leopard Panthera pardus fusca (Mammalia:
Carnivora: Felidae) abundance in Kuno Wildlife
Sanctuary, Madhya Pradesh, India. Journal of Threatened Taxa 11(5):
13531–13544; https://doi.org/10.11609/jott.4774.11.5.13531-13544
1) Abstract—Page 13531,
Line no 7 “16 Trail cameras” should be stated as “10 Trail cameras”
2) Material and method
section under the title “Trail camera placements”(Column 3) page
13534, Line No—12 “Sixteen trail cameras” should be stated as “Ten trail
cameras”.
3) Abstract—Page
13531, Line no 8 “The total sampling effort was 180 trap-nights” could be
stated as “The total sampling effort was 180 trap-nights for each study
habitat”