Orchidaceae

Key to the species of Orchidaceae View in CoL View at ENA in PE Chacrinha

1. Epiphytic herbs.

2. One apical leaf; inflorescence lateral, in panicle; sepals and petals maculate ........................................................ ................................................ Trichocentrum pumilum

2. Two apical leaves; inflorescence terminal, in raceme; sepals and petals immaculate............ Cattleya forbesii

1’. Terricolous or rupicolous herbs.

3. Leaves apical.

4. Two leaves ...................................... Maxillaria subulata

4’. One leaf.

5. Leaves maculate; inflorescence lateral; flowers calcarate .................................................... Oeceoclades maculata

5’. Leaves immaculate; inflorescence terminal; flowers ecalcarate.

6. Leaves cylindrical; sepals and petals white-yellowish to yellowish .................................. Brassavola tuberculata

6’. Leaves flat to concave; sepals and petals purple ............. ............................................................ Acianthera limae

3’. Leaves basal in rosette or distributed along the caulome.

7. Leaves reticulate-veined.............. Aspidogyne argentea

7’. Leaves obscurely or distinctly parallel-veined.

8. Leaves membranaceous or chartaceous, convolute (rolled like an umbrella) or plicate (folded like a fan).

9. Leaves plicate, sepals and petals yellow to greenish-yell ow...................................... .......... Cyrtopodium flavum

9’. Leaves convolute, sepals and petals pale green to green.

10. Flowers resupinate; lip trilobed.

11. Leaves sessile; inflorescence glabrous; petals bifid ....... ..................................................... Habenaria leptoceras

11’. Leaves petiolate; inflorescence pilose; petals entire.

12. One to three leaves; flowers calcarate; lip green ............ ........................................................ Eltroplectris triloba

12’. Five leaves; flowers ecalcarate; lip white .................. ...... ................................................. Cyclopogon argyrifolius

10’. Flowers non-resupinate; lip entire.

13. Leaves petiolate, rarely sessile; leaf blade lanceolate or elliptic; inflorescence lax; flowers not overlapping ........ .............................................. Prescottia plantaginifolia

13’. Leaves sessile; leaf blade linear; inflorescence congested; flowers overlapping .............. Prescottia spiranthophylla

8’. Leaves coriaceous, conduplicate (folded along the midrib).

14. Flowers resupinate; sepals and petals green to brownish ............................ Epidendrum ammophilum

14’. Flowers non-resupinate; sepals and petals pink to lilac.

15. Lip with cut-out and multifaceted callus and limited to the center of the disc........................................................ ................................................. Epidendrum secundum

15’. Lip with two basal oval calli and keel-like central callus projected longitudinally over the central lobe ............................................ Epidendrum denticulatum