Journal of Threatened Taxa | www.threatenedtaxa.org | 26 December 2018 | 10(15): 13044–13045

 

 

Lectotypification of two names in the genus Gymnostachyum (Acanthaceae)

 

M.C. Shameer 1 & V.K. Sreenivas 2

 

1,2 Department of Botany, Sri Vyasa N.S.S. College, Vyasagiri P.O., Wadakkanchery, Thrissur District, Kerala 680652, India

1 Research and Development Centre, Bharathiar University, Maruthamalai Road, Coimbatore, Tamil Nadu 641046, India

1 scheriyath@gmail.com (corresponding author), 2 sreenivasvk@gmail.com

 

 

 

 

doi: https://doi.org/10.11609/jott.4321.10.15.13044-13045

 

Editor: Mandar N. Datar, MACS-Agharkar Research Institute, Pune, India.     Date of publication: 26 December 2018 (online & print)

 

Manuscript details: Ms # 4321 | Received 07 June 2018 | Final received 17 December 2018 | Finally accepted 20 December 2018

 

Citation: Shameer, M.C. & V.K. Sreenivas (2018). Lectotypification of two names in the genus Gymnostachyum (Acanthaceae). Journal of Threatened Taxa 10(15): 13044–13045; https://doi.org/10.11609/jott.4321.10.15.13044-13045

 

Copyright: © Shameer & Sreenivas 2018. Creative Commons Attribution 4.0 International License. JoTT allows unrestricted use of this article in any medium, reproduction and distribution by providing adequate credit to the authors and the source of publication.

 

Funding: None.

 

Competing interests: The authors declare no competing interests.

 

Acknowledgements: Authors are grateful to the personnel of the following herbaria: CAL, MH and K, for permitting to access their digital images to do this research; Dr. K.M. Prabhukumar for his suggestions and directions for improving the manuscript. Critical comments received from the anonymous reviewers helped us to improve the manuscript.

 

 

 

The genus Gymnostachyum Nees, belongs to the family Acanthaceae, comprises about 52 species (www.plantsoftheworldonline.org), distributed mainly in tropical Asia (www.efloras.org).  In India, 11 species and four varieties have been recorded to date from various geographical regions (Karthikeyan et al. 2009); of which, 12 taxa are recorded so far from peninsular India (Gamble 1924; Prabhukumar et al. 2015).  As part of the ongoing taxonomic revision in the genus Gymnostachyum in India, the need for lectotypification of two names was identified, viz., G. glabrum (Dalzell) T. Anderson (1850: 338, 1867: 506) and G. glabrum var. denticulatum C.B. Clarke (1885: 509). Clarke (1885) delineates var. denticulatum from latter by its distinctly toothed and glabrous nature of lamina.  The lectotypes are designated here according to ICN Shenzhen Code Art. 9.3 (Turland et al. 2018).

 

Gymnostachyum glabrum (Dalzell) T. Anderson (1867: 506)

Cryptophragmium glabrum Dalzell (1850: 338)

Type (lectotype, designated here): India, Maharashtra, Bombay Ghats, N.A. Dalzell s.n., (K000885669) [K; digital image!] Image 1.

Residual syntypes: India, Maharashtra, South Concan, M Law s.n., (K000885668) [digital image!]

Nomenclatural notes: Dalzell (1850) proposed the name Cryptophragmium glabrum based on his collections from Bombay Ghats and Law’s collection from South Concan (present day Konkan) region, India.  Later, Anderson (1867) transferred the name to the genus Gymnostachyum, as G. glabrum.  During the study, we have traced two specimens, which represent duplicates from a heterogenous collection (Dalzell’s and Law’s) with one sheet each.  Both the sheets are well preserved and bear flowers and fruits.  According to ICN Art. 9.3 (Turland et al. 2018), the specimen collected by the author and kept in K (K000885669) fits the description, and is preserved very well with locality and collector name, which is considered as the best choice and designated here as the lectotype.

Apart from this, we have also traced one more specimen from CAL (CAL0000019998), unfortunately, the collector’s name, date of collection and locality were missing in the sheet, hence not considered as type.

 

Gymnostachyum glabrum (Dalzell) T. Anderson var. denticulatum C.B. Clarke (1884: 509).

Type (lectotype, designated here): India, Maharashtra, Concan Ghat, Kala Naddi, December 1852, D Ritchie 1211 (K000885672) [digital images!] Image 2.

Residual syntypes: India, Maharashtra, Ram Ghat, February 1853, D Ritchie 1211 (K barcode K000885670) [digital image!]; N.A. Dalzell s.n., (K000885671) [digital image!]

Nomenclatural notes: Clarke (1884) proposed a new variety of G. glabrum, var. denticulatum based on the collections of Dalzell & Ritchie from Concan Ghats of India.  Earlier both the collectors had included their collections under the name Cryptophragmium glabrum.  In the protologue, the author mentioned about two collections and we have traced three sheets, all are housed at K.  We found that Ritchie collected the plants in two seasons, viz., December 1852 (K000885672) and February 1853 (K000885670) and both the specimens were mounted on a single sheet with a single collection number.  All the sheets are well preserved and bear flowers and fruits.  In  Dalzell’s collection, he has not mentioned the locality, collection number and date of collection.  According to ICN Art. 9.3 of Shenzhen code (Turland et al. 2018), the specimen collected by Ritchie and mounted on the right side of the sheet with locality, date and collection number kept at K (K000885672) fits the description, which is considered as the best choice and designated here as the lectotype.

 

References

 

Anderson, T. (1867). An enumeration of the Indian species of Acanthaceae. Botanical Journal of Linnean Society 7: 425–526.

Clarke, C.B. (1885). Acanthaceae, pp. 387–558.  In: Hooker, J.D. (ed.) The Flora of British India - 4. Reeve & Co., Ltd., London.

Dalzell, N.A. (1850). Contributions to the Botany of western India. Hooker’s Journal of Botany and Kew Garden Miscellany 2: 336–344.

Karthikeyan, S., M.Sanjappa & S.Moorthy (2009). Flowering Plants of India - Dicotyledons, Volume 1 (Acanthaceae – Avicenniaceae). Botanical Survey of India, Kolkata, 365pp.

Turland, N.J., J.H. Wiersema, F.R. Barrie, W. Greuter, D.L. Hawksworth, P.S. Herendeen, S. Knapp, W.-H. Kusber, D.-Z. Li, K. Marhold, T.W. May, J. McNeill, A.M. Monro, J. Prado, M.J. Price & G.F. Smith (eds.) (2018). International Code of Nomenclature for Algae, Fungi, and Plants (Shenzhen Code) Adopted by the Nineteenth International Botanical Congress Shenzhen, China, July 2017. Regnum Vegetabile 159. Koeltz Botanical Books, Glashütten: https://doi.org/10.12705/Code.2018

Prabhukumar, K.M., B. Indira, V.B. Sreekumar, K.S. Ramya, S. George, K.J. Dantas & A.D. Suma (2015). Gymnostachyum warrieranum (Acanthaceae), a new species from Western Ghats of India with morphological and molecular data. Kew Bulletin 70(3): 1–9; https://doi.org/10.1007/s12225-015-9590-9

www.efloras.org (accessed on 14 April 2018)

www.plantsoftheworldonline.org (accessed on 14 December 2018)