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| Species | Distribution |
|---|---|
| Acanthephippium striattum | Lower valleys |
| A. sylhetans | Lower valleys |
| Bulbophyllum gracilepis | Low Teesta and Rangeet Valleys |
| B.Sikkimensis | Teesta Valleys |
| B.andersonii | Teesta and Rangeet Valleys |
| B.griffithii | Lachung Valleys |
| C. chloroleuca | Chungthang |
| C.Alismaefolia | Chungthung |
| C.whiteana | Chungthung Valleys |
| Cleisostoma trichoromum | Rangeet Valley |
| Coelogyne barbata | Pangolakha |
| Cypripedium tibeticum | High altitute areas of the North sikkim |
| Cymbidium whiteae* | Gangtok area |
| C.muronianum | Thorpo area or Teesta Valleys |
| Dendrobium terminale | Teesta and Rangeet Valleys |
| D. pegnuanum | Teesta Valleys |
| D. bicamaratum | Teesta Valleys |
| D. clavatum | Teesta and Rangeet Valleys |
| D. caadidum | Rabdentse and Laxhung |
| D. sulcata | North Sikkim |
| D. formosum | Lower valley of Gayzing |
| Didiciea cunnighamii | Lachen valley |
| Eria coronaria | North Sikkim |
| Eulophia macrobulton | Teesta Valley |
| Gastrochilus intermedius | Throught out Sikkim |
| G.affinis** | Rabdenste |
| Nephelaphyllum pulchrum | Low warm vallys |
| N. caudifolium | Sikkim- Kalimpong border |
| Paphiopedilum faireanum | Tinkitam |
| Risleya atripurpurea | Dzongri area |
| Robuqueta succisa | Teesta valley |
| Sterochilus hirtus | North sikkim in Znagu area |
| Tipularia josephii | Zema area |
| Uncifera lancifolia | Ravangla |
| Vanda alpina | Singtam area |
| V.pumila | Singtam |
| Yoania prainii | Lachen Valley |
Source:Kanchenjunga Mountain Complex, WWF Nepal Program