Palmorchis, Barb. Rodr.

Szlachetko, Dariusz L. & Baranow, Przemysław, 2013, New species of Palmorchis Barb. Rodr. (Orchidaceae) from Colombia, Candollea 68 (1), pp. 105-113 : 106

Key to Colombian species of Palmorchis (including P. pandurata C. Schweinf. & Correll and P. guianensis (Schltr.) C. Schweinf. & Correll which are suspected to occur in the country)

1. Lip widest near the middle ........................................... 2

1a. Lip widest at or near the apex ...................................... 4

2. Hypochile narrowly triangular, widest just below the apex, with two lamellae running in the apical third, lateral lobes falcate, acute..... 1. P. carlos-parrae Szlach. & Baranow

2a. Hypochile not as above ................................................ 3

3. Lip 6 mm long im total, ciliate at the base only .............. ............................... 2. P. fractiflexa Szlach. & Baranow

3a. Lip 17-34 mm long in total, pubescent on the inner surface................... 4. P. misas-urretae Szlach. & Baranow

4. Lip sinuate or notched at the apex................................ 5

4a. Lip middle lobe obscure, ligulate to lanceolate............ 7

5. Leaves to 9.5 cm wide, lip pandurate in outline, pubescent at base .......... P. pandurata C. Schweinf. & Correll

5a. Width of the leaves here lacking Lip flabellate-rotundate in outline, pubescent or pilose on the inner surface ..... 6

6. Leaves 38-42 cm long, 10-11 cm wide............................ ..................................... P. deceptorius Veyret & Szlach.

6a. Leaves to 28 cm long, 3-5 cm wide................................. .................... P. powellii (Ames) C. Schweinf. & Correll

7. Lip middle lobe truncate............................................... 8

7a. Lip middle lobe acute to subobtuse............................ 10

8. Leaves narrowly lanceolate to linear-lanceolate, long acuminate, lip pubescent in the lower half ...................... .................................................. P. puber (Cogn.) Garay

8a. Leaves elliptic to ovate-elliptic, acuminate, lip glabrous in the lower part............................................................ 9

9. Leaves blades up to 24 cm long and 9 cm wide, elliptic to ovate-elliptic, acuminate, petiole up to 10 cm long, floral segments 10-13 mm long and 1.6-6 mm wide ........... .................. P. lobulata (Mansf.) C. Schweinf. & Correll

9a. Leaves blades 13-15 cm long and 3.5-4 cm wide, oblongelliptic, petiole up to 5 cm long, floral segments 6.2- 7.2 mm long and 2.2-3.5 mm wide.................................. .............. P. guianensis (Schltr.) C. Schweinf. & Correll

10. Lip and tepals over 9 mm long ................................... 11

10a. Lip up to 6.5 mm long, tepals to 8 mm long .............. 12

11. Lip with basal, woolly pubescent keel and two rather thick lamellae running along almost entire lip length .............. ........................ 5. P. valdiviesoanus Szlach. & Baranow

11a. Lip not as above ......................................................... 13

12. Hypochile lower half oblong, pubescent and distinctly thickened along midvein, apical half almost rounded to transversely elliptic, with thick, glabrous 3-lobed callus at the apex; epichile clawed, subcordate, acuminate, thickened in the centre .... 3. P. maculata Szlach. & Baranow

12a. Hypochile with a linear, conduplicate, puberulent base, lamina trapezoid in outline, lateral lobes obtuse; epichile sessile, fleshy, oblong-lanceolate, subacute .................... ...................................................... P. colombiana Garay

13. Gynostemium glabrous..... P. trilobulata L. O. Williams

13a. Gynostemium pubescent on the ventral surface .............. ........................................................ P. trinotata Dressler