Platystele (Luer, 1990) Schlechter, 1910

Rizo Patrón, Federico L., 2022, Platystele peruviana sp nov. (Orchidaceae), the smallest orchid from Peru, Phytotaxa 564 (1), pp. 113-120 : 118-119

Identification key for Peruvian species of Platystele .

1 Inflorescence simultaneously flowered, 3 or more flowers open simultaneously..............................................................................2

1´Inflorescence successively flowered, 1 or sometimes 2, rarely 3 flowers open simultaneously........................................................6

2 Inflorescence shorter than the leaf............................................................................................................................... P. stenostachya

2´Inflorescence as long as or longer than leaf .......................................................................................................................................3

3 Inflorescence more or less simultaneously flowered..........................................................................................................................4

3´Inflorescence successively flowered ..................................................................................................................................................5

4 Lip acute or acuminate ................................................................................................................................................... P. lancilabris

4´Lip subacute to obtuse................................................................................................................................................ P. Schmidchenii

5 Leaves ovoid, semiterete; lip acuminate ................................................................................................................................ P. rauhii

5´Leaves neither ovoid or semiterete; lip narrowly rounded.................................................................................................... P. misera

6 Inflorescence considerably longer than the leaf .................................................................................................................................7

6´Inflorescence shorter to a little longer than the leaf ...........................................................................................................................9

7 Lip ovate with the apex acute and acuminate.....................................................................................................................................8

7´Lip ovate with the apex acute, not acuminate .................................................................................................................. P. oxyglossa

8 Lip ovate, contracted near the middle into a sublate apex ..................................................................................... P. examen-culicum

8´Lip narrowly ovate, acuminate, acute................................................................................................................................. P. aculeata

9 Lateral sepals subfalcate, parallel..................................................................................................................................... P. peruviana

9´Lateral sepals strait, oblique .............................................................................................................................................................10

10 Sepals and petals minute ciliate; lip glabrous....................................................................................................................... P. pisifera

10´Sepals, petals and lip cellular-ciliate and cellular-pubescent .................................................................................................... P. psix

Clave de identificación para especies peruanas de Platystele .

1 Inflorescencia con flores simultaneas, 3 o más flores simultaneas ....................................................................................................2

1´Inflorescencia con flores sucesivas, 1 o a veces.................................................................................................................................2 raramente 3 flores abiertas al mismo tiempo......................................................................................................................................6

2 Inflorescencia más corta que la hoja ........................................................................................................................... P. stenostachya

2´Inflorescencia tan o más larga que la hoja..........................................................................................................................................3

3 Inflorescencia con flores más o menos simultáneas...........................................................................................................................4

3´Inflorescencia con flores sucesivas ....................................................................................................................................................5

4 Labelo agudo .................................................................................................................................................................. P. lancilabris

4´Labelo subagudo a obtuso .......................................................................................................................................... P. Schmidchenii

5 Hojas ovoides, semiterete; labelo acuminado ........................................................................................................................ P. rauhii

5´Hojas nunca ovoides o semiterete; labelo con ápice redondeado.......................................................................................... P. misera

6 Inflorescencia considerablemente más larga que las hojas ................................................................................................................7

6´Inflorescencia más corta o un poco más larga que las hojas ..............................................................................................................9

7 Labelo ovado con el ápice agudo acuminado.....................................................................................................................................8

7´Labelo ovado con el ápice agudo no acuminado.............................................................................................................. P. oxyglossa

8 Labelo ovado, adelgazado cerca del centro hacia un ápice delgado ...................................................................... P. examen-culicum

8´Labelo delgadamente ovado, acuminado, agudo................................................................................................................ P. aculeata

9 Sépalos laterales falcados, paralelos................................................................................................................................. P. peruviana

9´Sépalos laterales rectos, oblicuos .....................................................................................................................................................10

10 Sépalos y pétalos con cilios diminutos; labelo glabro.......................................................................................................... P. pisifera

10´Sépalos, pétalos y labelo con Pubescencia celular .................................................................................................................... P. psix