Otatea (McClure & E. W. Sm) Calderon & Soderstrom, 1980

Ruiz-Sanchez, Eduardo, 2013, Otatea ramirezii (Poaceae: Bambusoideae: Bambuseae) flower description and the importance of the Mexican national living bamboo collection, Phytotaxa 150 (1), pp. 54-60 : 55

Key to the species of Otatea based on flowering characters

1. Synflorescences with 6–33 spikelets ............................................................................................................................ 2

1. Synflorescences with 2–7 spikelets .............................................................................................................................. 4

2. Synflorescences 10–15 cm long, paniculate, glume I 5–7 mm long (including the awn), glume II 7–9.5 mm long (including the awn) ...................................................................................................................... O. fimbriata Soderstr.

2. Synflorescences 5–10 cm long, paniculate to racemose, glume I 2.5–8.2 mm long (including the awn), glume II 3.5– 8.5 mm long (including the awn) .................................................................................................................................. 3

3. Lemmas 8–13 mm long (including the awn), pubescent; paleas keels pubescent; lodicules glabrous with ciliate margin ................................................................................................. O. acuminata (Munro) C. Calderón & Soderstr.

3. Lemmas 10–14.5 mm long (including the awn), scabrous; paleas keels glabrous; lodicules pubescent ....................... ............................................................................................................................................. O. ramirezii Ruiz-Sanchez

4. Spikelets purple-blue; glume I 6–11 mm long (including the awn), glume II 8–12.7 mm long (including the awn); lemmas 11.5–17 mm long (including the awn) .................................... O. ximenae Ruiz-Sanchez & Clark (2011: 330)

4. Spikelets green; glume I 6.5–13 mm long (including the awn), glume II 9.5–17 mm (including the awn); lemmas 14.3–21 mm (including the awn) .................................................................................................................................. 5

5. Lemmas glabrous; paleas 9.7–11.7 mm long.................................. O. reynosoana Ruiz-Sanchez & Clark (2011: 328)

5. Lemmas scabrous-pubescent; paleas 14–15.4 mm long ........................................................ O. glauca Clark & Cortés