Polystachya, W.J.Hooker, 1824
publication ID |
https://doi.org/10.11646/phytotaxa.50.1.4 |
persistent identifier |
https://treatment.plazi.org/id/250B8837-FFB2-FF97-FF6A-F9B3FA78FE90 |
treatment provided by |
Felipe |
scientific name |
Polystachya |
status |
|
Key to distinguish Central American Species of Polystachya View in CoL (South of the Tehuantepec Isthmus)
1. Rachis of the inflorescence and pedicellate ovary densely hispid-puberulous ( figure 1B View FIGURE 1 ).......................................... 2
- Rachis of the inflorescence and pedicellate ovary glabrous or sparsely pubescent ..................................................... 3
2. Central lobe of the labellum transversely elliptic-suborbicular to transversely subquadrate or transversely oblong, always broader than long, apically truncate, truncate-rounded to deeply emarginate............................. P. masayensis
- Central lobe of the labellum lanceolate to ovate, always longer than wide, apically rounded to broadly acute .................................................................................................................................................................................... P. elatior
3. Base of labellum straight or slightly cuneated. Central lobe of labellum half or more than half the length of the labellum, lateral lobes well developed ........................................................................................................... P. caracasana
- Base of the labellum unguiculated. Central lobe of labellum less than half the length of the labellum, lateral lobes small and poorly developed ......................................................................................................................................... 4
4. Flowers small-sized ( 4.30–4.70 mm long), column foot small ( 0.30–0.40 mm long), callus of the labellum rounded and short (ca. 0.40 mm high), lateral lobes small and well-developed.......................................................... P. clavata
- Flowers medium-sized ( 6.20–9.60 mm long), column foot large ( 0.90–1.20 mm long), callus of the labellum rounded and tall ( 0.80–1.10 mm high), lateral lobes small and poorly developed......................................... P. lineata
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