WmTTEN ET AL. Relationships of Zygopetalinae trnL-F sequences, and relationships within this clade trnL-F are resolved or until sequence data from other should be viewed with suspicion until problems with regions are included. Key to the Genera of the Chondrorhyncha complex la Plants pendent, leaves lax, minutely papillose, gray-green ........................................... Benzingia (most species) lb Plants erect, leaves not p ap illo se or gray -gree ........................................................................................................................................................... 2 2 a F lo w e r s n o n re su p in a te ................................................................................................................................................................................................................... 3 2 b F lo w ers re su p in ate o r p en d en t .............................................................................................................................................................................................. 4 3a Column foot 0.5-1.5 mm; viscidium curling on removal; apex of lip acute, entire ...................................... Chaubardiella 3b Column foot about 2 mm; viscidium ,l'.!"I nii1. not curling; apex of lip rounded, erose................... Benzingia hirtzii 4 a L ip d e e p ly p o u c h e d ......................................................................................................................................................................................................................... 5 4b Lip open or infundibuliform, but not deeply concave .................................................................................................................................. 6 5a Lip usually pinched in or closed distally; callus generally sharply many toothed; plants erect; pollinarium with a p r o m in e n t stip e .................................................................................................................................................................................................................. S te n ia 5b Lip open distally; plants usually pendent; callus shallowly or few toothed; pollinarium with a small stipe................... .................................................................................................................................................................................................................................................. BenzingiaBenzng 6 a C a llu s b a s a l ................................................................................................................................................................ 7 6b C allu s n ear or reach in g m middle o f lip .......................................... ............... .................................................................................................... 10 7a Column with distinct wings near middle; with pseudobulbs (often small).............................. ..................... Chaubardia 7b Column without wings near middle or wings only apical; usually without pseudobulbs ..................................... 8 8a Callus narrow, with 2 or 4 teeth ......................Stenotyla.................................................................................................................................................. StenotylaStenotyla 8b C allu s w ide, w ith 6-20+ ridges or teeth ........................................................... ............................................................... ..................... . 9 9a Each ridge of callus ending in an acuminate bristle; leaves large (25-30 x 3-5 cm), flowers large (6-10 cm diam- e te r ) ...................................................................................................................................................................................................................................... H u n tley a 9b Ridges of callus rounded, without bristles; leaves small (about 10 x 2 cm), flowers small (about 3 cm diameter) ............................................................................................................................................................................................................................................ H o e h n e e lla 10a Column with a ventral keel; viscidium curling upon removal; inflorescence axis thin; callus usually bilobed; flow ers sm all (2-3 cm diam eter) .................... .......... ............................ ...... ......... ................................................ K efersteinia 10b Column usually without a ventral keel; viscidium not curling; inflorescence axis thick; callus variable; flowers la rg e (6 1 0 c m d ia m e te r) .......................................................................... ............ ..................................... ........ ...................................................... 1 1 1 la Lip margins basally turned upward surrounding column, flowers more or less gullet shaped........ Warczewiczella 1 lb Lip more or less flat, margins not surrounding column, flowers more or less patent ...................... .................. ... 12 12a Column i -i .n ii-. keeled beneath ........................................................... Cochleanthes 12 b C o lu m n flat o r co n cav e b en death ......................13............................................................................................................................................................... 13 13a Callus of raised, rounded keels, together more or less semicircular ...................................... ....................... Pescatorea 13b Callus flattened or 2-lobed, not semicircular............................................................... 14 14a Callus wide and laminar, ili i....... irregular teeth, to 2/3 length of lip, 1/3 to 5/6 width of lip; stipe broad and shield shaped .......................yblema........................................................................................................................................................................... Euryblema 14b Callus bilobed and fleshy, narrower or triangular, with few teeth; stipe narrow or narrowed near viscidium......15 15a Lip with a second thickening distal to the bilobed callus; pollinarium with a distinct stipe; lip often fimbriate .................................................................................................................................................................................................................................. ChondroscapChondroscaphe 15b Lip without a second -1 i. ~ -i.... pollinarium with a small or indistinct stipe; lip not fimbriate .................................16 16a Lip acuminate ............................................................................................................................................................................................................. BenzingiaBenzng 1 6 b L ip tru n c ate ro u n d ed o r retu se ...................................................................................................................................................................................... 17 17a Callus wide, bilobed, thick and fleshy ..................................................................................................................................... Daiotyla 17b Callus of 2 or various teeth, widest basally and narrowing distally, not thick and fleshy ..............................................18 18a Column with 2 or more globose, trichome covered appendages beneath; stipe broad or shield-like ...................... .................................................................................................................................................................................................................................... EchinorhynchaEchinorhyncha LANKESTERIANA5(2):