Cautleya

Taxonomic revision of the genus Cautleya (Zingiberaceae) in India with a description of a new variety (pdf)- Kizhakkethil AISHWARYA , Mamiyil SABU- Taiwania 66(1): 79‒88, 2021:
Taxonomic key to the taxa of Cautleya:
1a. Leaves petiolate; arils in fruit prominent, completely covering the seeds ……… C. spicata
1b. Leaves sessile; arils in fruit reduced, present only at the point of connection with the placentum …… 2
2a. Rhizome running; inflorescence lax, 1−5-flowered; floral bracts extending only up to half the length of calyx or shorter (during anthesis) ……… C. gracilis var. gracilis
2b. Rhizome clump-forming; inflorescence dense, ≥10-flowered; floral bracts extending beyond half the length of calyx (during anthesis) ………. 3
3a. Floral bract and calyx glabrous; corolla tube 2.6–2.7 cm long, longer than the calyx; lateral staminodes without a red streak; stamen 1.2–1.3 cm long …….. C. gracilis var. robusta
3b. Floral bract and calyx pubescent; corolla tube 1.4−1.8 cm long, as long as the calyx; lateral staminodes with a red streak at the base along the median; stamen 2.1–2.2 cm long .. C. gracilis var. hispida
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Cautleya gracilis (Sm.) Dandy (India (Arunachal Pradesh, Assam, Himachal Pradesh, Meghalaya, Nagaland, Sikkim, West Bengal, Uttarakhand and Uttar Pradesh), Bhutan, China, Myanmar, Nepal, Thailand and Vietnam as per Taxonomic revision of the genus Cautleya (Zingiberaceae) in India with a description of a new variety (pdf)- Kizhakkethil AISHWARYA , Mamiyil SABU- Taiwania 66(1): 79‒88, 2021)

Cautleya gracilis var. robusta (K.Schum.) Sanjappa (Himalaya to China (Yunnan): China South-Central, East Himalaya, Nepal, Tibet, West Himalaya as per POWO)

Cautleya spicata (Sm.) Baker (India (Arunachal Pradesh, Himachal Pradesh, Manipur, Meghalaya, Sikkim, Uttarakhand and West Bengal), Bhutan, China, Myanmar and Nepal as per Taxonomic revision of the genus Cautleya (Zingiberaceae) in India with a description of a new variety (pdf)- Kizhakkethil AISHWARYA , Mamiyil SABU- Taiwania 66(1): 79‒88, 2021)