Supplementary Table 1. Details about the studied Cymbopogon species and their distribution in India

Sl. No. / Cymbopogon species / Common name / Habitat
1.  / C. citratus / West Indian lemongrass / Gujarat, Maharashtra, Madhya Pradesh, Kerala
2.  / C. flexuosus / East Indian
lemon grass / Assam, Odisha, Andhra Pradesh, West Bengal, Kerala
3.  / C. martinii / Palmarosa / Gujarat, Rajasthan, Kerala, Tamil Nadu
4.  / C. nardus / Ceylon citronella / Andhra Pradesh, Assam, Bihar, Karnataka, Manipur, Tamil Nadu
5.  / C. pendulus / North Indian lemongrass / Jammu Kashmir, Himachal Pradesh, Arunachal Pradesh
6.  / C. winterianus / Java citronella / Uttar Pradesh, Madhya Pradesh, Bihar, Uttarakhand

Supplementary Table 2. Accession numbers of the barcode sequences procured from GenBank of NCBI

Sl. No. / Species name / NCBI Gene bank accession number
psbA-trnH spacer / rbcL / matK / ITS 1 & ITS 2 region
1.  / C. citratus / KT309045 / KT309053 / KT309061 / KT309069
2.  / C. flexuosus / KT309046 / KT309054 / KT309062 / KT309070
3.  / C. martinii / KT309049 / KT309057 / KT309065 / KT309073
4.  / C. nardus / KT309050 / KT309058 / KT309066 / KT309074
5.  / C. pendulus / KT309051 / KT309059 / KT309067 / KT309075
6.  / C. winterianus / KT309052 / KT309060 / KT309068 / KT309076

Supplementary Table 3. Demonstration of sequence variations in matK gene and ITS spacer region

of six species of Cymbopogon

Locus / *NP / C.
citratus / C. flexuosus / C. martinii / C. nardus / C. pendulus / C. winterianus
matK / 345 / G / G / G / G / G / A
626 / T / T / C / T / T / T
822 / T / T / C / T / T / T
834 / G / G / A / G / G / G
ITS region / 18 / C / T / C / T / C / T
30 / T / C / T / C / T / C
31 / C / T / C / T / C / T
35 / T / C / T / C / T / C
42 / A / A / G / A / A / A
57 / T / T / C / T / T / T
62 / C / T / C / C / C / T
116 / T / T / T / T / T / A
117 / A / A / C / A / A / A
128 / C / C / C / C / G / C
133 / C / T / T / C / C / T
147 / T / T / C / T / T / T
151 / T / C / T / C / T / C
166 / G / A / A / A / G / A
174 / G / T / T / T / G / T
316 / C / T / T / T / C / T
319 / T / T / C / T / T / T
367 / A / A / A / A / A / C
377 / G / C / G / A / G / T
378 / - / A / - / A / - / A
379 / - / G / - / G / - / G
380 / - / G / - / G / - / G
381 / - / T / - / T / - / T
392 / T / C / T / T / T / C
395 / C / T / C / T / C / T
401 / C / C / T / C / C / C
427 / G / G / G / G / T / G
430 / G / G / G / G / T / G
444 / C / C / T / C / C / C
478 / G / A / A / A / G / A

*nucleotide position