Burmannia, Linnaeus, 1753

Francis, Dani, Mohan, Vishnu, Venugopal, Divya K. & Nampy, Santhosh, 2021, Burmannia munnarensis (Burmanniaceae) a new species and rediscovery of B. indica after 110 years from southern Western Ghats, Kerala, India, Phytotaxa 507 (1), pp. 105-112 : 108-109

Key to the Indian species of Burmannia

1. Mycoheterotrophic, achlorophyllous herbs ........................................................................................................................................2

– Non mycoheterotrophic, chlorophyllous herbs ..................................................................................................................................4

2. Rhizome tuberous; basal hanging connective spur absent ............................................................................................ B. championii

– Rhizome not tuberous; basal hanging connective spur present..........................................................................................................3

3. Perianth wings ca. 4.5 × ca. 0.5 mm, narrow, linear ......................................................................................................... B. wallichii

– Perianth wings 5–10 × 2–3 mm, broad, half obovate-orbiculate ............................................................................... B. candelabrum

4. Radical rosette of leaves absent..........................................................................................................................................................5

– Radical rosette of leaves present (absent in B. pusilla ) ......................................................................................................................7

5. Stems unbranched; stem leaves thorn-like ............................................................................................................................ B. stricta

– Stems branched; stem leaves not thorn-like, linear............................................................................................................................6 6. Wings 1.5–6 mm broad; margin of the perianth lobes swollen, not involute or revolute ..................................................... B. indica

– Wings 0.3–0.5 mm broad; margin of the perianth lobes rather thin, involute............................................................. B. munnarensis

7. Margin of the perianth lobes double...................................................................................................................................................8

– Margin of the perianth lobes single ...................................................................................................................................... B. pusilla

8. Robust herbs, up to 75 cm high, with well developed, radical rosette of leaves up to 15 × 1.3 cm ................................... B. disticha

– Slender herbs, up to 30 cm high; reduced, radical rosette of leaves about ca. 1 × ca. 0.3 cm .......................................... B. coelestis