— 601 — 
2. Lobus intermedius et laterales laceri v. fimbri- 
ati v. lobi plus minus confluentes, petala lacera 
v. Integra (Bor.-Americ.) (Species 2 — 10.) 
Sect. 2. Fimbriatae. 
8. Lobi labelli omnes integri, petala quam sepala 
paulum longiora. (Species 2 Madagascarienses.) 
(Spec. 11—12.) Sect. 3. Fseudoholothrix. 
B. Labellum subsimplex. 
3. Labellum maximum quam sepala et petala multo 
majus. (Sp. 13—17.) Sect. 4. Galeandriformes. 
4. Labellum quam sepala petalaque longius antice 
trilobulum v. tridentatum. (Species 18—22.) 
Sect. 5. Virides. 
C. Labellum omnino simplex. 
5. Caulis basi foliis 1 v. 2 v. 3 majoribus vestitus, 
calcar plerumque longum, racemus pauci—pluri- 
rarius multiflorus. (Species 23—47.) 
Sect. 6. Bifolia. 
6. Caulis elongatus foliosus, racemus elongatus 
multiflorus, calcar baud v. rarissime elongatum. 
(Species 48—55.) Sect. 7. Dolichostachyae . 
H. Heteroblastae. 
Caules breves folio 1 (v. 2) magno instructi a caulibus 
floriferis parvifoliis bene distincti. (Species 56—58.) 
Sect. 8. Mecosa. 
Sect. 1. Susanna. 
Labellum excavatum longe calcaratum trilobum, lobi late- 
r &les magni flabellati margine profunde incisi, lobus inter- 
^cdius multo minor integer lanceolatus. Planta maxima. 
Indica. 
_ l - Platanthera Susannae Lindl. Tuberibus 7 
10 cm longis, caule elato robusto ad 80—100 cm alto folioso, 
°liis ovati-oblongis v. oblongi-lanceolatis acutis acuminatisve 
^opremis vaginantibus in bracteas magnas foliaceas decrescen- 
* ^ racemo paucifloro, floribus maximis generis 10 cm diam. 
latissime oblongis obovatis (subquadratis) antice ob- 
