Ischaemum thomsonianum Stapf ex C.E.C. Fisch.

Gurappa, Settipalle & Kumar, Thiruppathi Senthil, 2022, Lectotypification of Ischaemum thomsonianum Stapf ex C. E. C. Fisch. (Poaceae: Panicoideae: Andropogoneae), Adansonia (3) 44 (20), pp. 211-214 : 212

publication ID

https://doi.org/ 10.5252/adansonia2022v44a20

DOI

https://doi.org/10.5281/zenodo.6855972

persistent identifier

https://treatment.plazi.org/id/03D9E860-FF9F-2E53-25EA-F892FBEBF95D

treatment provided by

Carolina (2022-07-18 12:05:50, last updated 2024-11-25 18:29:49)

scientific name

Ischaemum thomsonianum Stapf ex C.E.C. Fisch.
status

 

Ischaemum thomsonianum Stapf ex C.E.C. Fisch. View in CoL

( Fig. 1 View FIG )

Flora of the Presidency of Madras 3: 1722 ( Fischer 1934).

TYPE CITATION. — “ Mysore; Cochin; Travancore; up to 3,000 ft. ”.

LECTOTYPE (here designated). — India. Maisor & Carnatic, G. Thomson s.n. (lecto-, K [ K000245702 , image]! ; isolecto-, K [ K000245701 , image]!; E [ E00393557 , image]!).

DISTRIBUTION. — India. Karnataka, Kerala, Maharashtra and Tamil Nadu.

REMARKS

Hooker filius (1897: 135) identified the grass specimens of G. Thomson from “Mysore or the Carnatic” as Ischaemum murinum Forst. in September 1889, C.B. Clarke dissected the type material, illustrated it (as can be seen from the original material of two sheets at Kew, cited in the ‘Introduction’) and identified it to be the species of Forster (Forster 1780: 185). But, later, on examination, O. Stapf found it different from the New Caledonian species I. murinum Forst. (Native range from New Guinea to SW Pacific) and assigned the name I. nonum Stapf (det.; s.d.).

Having confirmed of its distinct identity, Fischer (1934: 1722) provided a new replacement name “ Ischaemum thomsonianum, Stapf MS. , n. nom. differently from I. murinum Hook. f. non Forst. ; FBI. vii. 135”, as suggested by Stapf in preference (cf. determinavit slip on the original material by C.E.C. Fischer; 14.IX.1932 at K and 20.XII.1932 at E.

No later homonym situation arise in the present case but misapplication of a validly published name.

While proposing the new name in Flora of Madras, Fischer (1934: 1722) proposed the name in the species list of Ischaemum with its distribution as “Mysore; Cochin; Travancore; up to 3,000 ft. ’. The name has a diagnostic key ( Fischer 1934: 1719) but no description following the name, as per the format of Flora of Madras. The description was provided earlier by Hooker filius (1896 [“1897”]). Moreover, Fischer (1934: 1722) proposed a new name but not a new species, which was an error. However, having mentioned “non G. Forst.” he excluded its type. Conversely, I. thomsonianum is an accepted name ( Bor 1960; Karthikeyan et al. 1989; Sur 2001; Srivastava & Nair 2010; Kellogg et al. 2020) but needs lectotypification according to ICN for Algae, Fungi, and Plants ( Turland et al. 2018).

Finally, of the original material housed at Kew, the specimen K000245702 is the most suitable having pencil sketches (drawings of dissected floral parts pasted at one place) by C.B. Clarke , and the sheet matches well with the key provided by Fischer in Flora of Madras ( Fischer 1934: 1719). Therefore, it was chosen and designated here as lectotype for I. thomsonianum Stapf ex C.E.C. Fisch .

BOR N. L. 1960. - The Grasses of Burma, Ceylon, India and Pakistan (excluding Bambuseae). Pergamon Press, Oxford, 767 p.

FISCHER C. E. C. 1934. - Flora of the Presidency of Madras. Vol. 3. Adlard & Son, Limited, London: 1348 - 2017.

HOOKER J. D. (1896) 1897. - The Flora of British India. Vol. 7. Reeve and Co., London, 842 p. https: // www. biodiversitylibrary. org / page / 18722702

KARTHIKEYAN S., JAIN S. K., NAYAR M. P. & SANJAPPA M. 1989. - Florae Indicae Enumeratio: Monocotyledonae. Botanical Survey of India, Calcutta, 435 p.

KELLOGG E. A., ABBOTT J. R., BAWA K. S., GANDHI K. N., KAILASH B. R., GANESHAIAH K. N., SHRESTHA U. B. & RAVEN P. H. 2020. - Checklist of the grasses of India. PhytoKeys 163: 1 - 560. https: // doi. org / 10.3897 / phytokeys. 163.38393

SRIVASTAVA S. K. & NAIR V. J. 2010. - Genus Ischaemum L. (Poaceae) in India. Nelumbo 52: 63 - 92.

SUR P. R. 2001. - A revision of the genus Ischaemum Linn. (Poaceae) in India. Journal of Economic and Taxonomic Botany 25: 407 - 438.

TURLAND N. J., WIERSEMA J. H., BARRIE F. R., GREUTER W., HAWK- SWORTH D. L., HERENDEEN P. S., KNAPP S., KUSBER W. - H., LI D. - Z., MARHOLD K., MAY T. W., MCNEILL J., MONRO A. M., PRADO J., PRICE M J. & SMITH G. F. 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, Glashutten. https: // doi. org / 10.12705 / Code. 2018

Gallery Image

FIG. 1. — Lectotype of Ischaemum thomsonianum Stapf ex C.E.C. Fisch. (K000245702). © The Board of Trustees of the Royal Botanic Gardens, Kew.

K

Royal Botanic Gardens

E

Royal Botanic Garden Edinburgh

Kingdom

Plantae

Phylum

Tracheophyta

Class

Liliopsida

Order

Poales

Family

Poaceae

Genus

Ischaemum