Amomum

Thomas, V. P., Nissar, Muhammed & Sabu, M., 2015, Amomum kingii var. oblongum (Zingiberaceae): a new variety from Sikkim Himalaya, Phytotaxa 220 (1), pp. 89-94 : 91

Key to the related taxa of Amomum found in Sikkim Himalaya

1. Rhizome stoloniferous; habit spreading............................................................................................................................................2

- Rhizome non-stoloniferous; clump forming......................................................................................................................................3

2. Capsule smooth walled.......................................................................................................................................... A. corynostachyum

- Capsule echinate........................................................................................................................................................... A. aromaticum

3. Fruit smooth walled............................................................................................................................................................................4

- Fruit winged........................................................................................................................................................................................6

4. Flowers in cincinnus of 3 or 4 in a bract; peduncle short or absent; fruits with an apical depression.......................... A. sabuanum

- Flower born singly from each bract; peduncle 5 − 15 cm long; fruits without an apical depression...................................................5

5. Inflorescence 13–25 cm long; flowers compactly arranged; labellum obovate, obscurely 3-lobed with legible pink radiating strands; fruits globose, red tinged ....................................................................................................................................... A. kingii var. kingii

- Inflorescence 25–50 cm long, flowers laxly arranged; labellum oblong, 3-lobed with spreading pink design at centre; fruits oblong, pale pink ........................................................................................................................................................ A. kingii var. oblongum

6. Lamina glabrous or appressed hairy beneath; flowers yellow ....................................................................………………………...7

- Lamina tomentose beneath; flowers white ....................................................................................................................... A. maximum

7. Leaves silvery beneath; bracts perishable before anthesis; calyx without subulate horn.................................................. A. sericeum

- Leaves pale green beneath; bracts not deciduous; calyx with long subulate horns......................................................... A. subulatum