THE FLORA OF THE NOKTHERN TERRITORY. 75 



Tribe II. — Anther M-like, incumbent, usually deciduous. PoUen-masses 

 waxy, 4 in pairs, on a single or double caudicle attached to a gland. Epiphytes 

 or terrestial with creeping rhizomes. — 



Epithytes. Caudicle single. — 8. Vanda. 



Terrestial with short creeping rhizomes. Caudicle single. 



Sepals and petals erect. LabeUum scarcely saccate at the base, the 



disk with longitudinal raised hues. — 3. Geodorum. 

 Sepals and petals spreading. LabeUum with a short pouch or spur at 

 the base, marked with cristate or bearded veins. — 4. Eulophia. 

 Terrestial with short creeping rhizomes. Caudicle bipartite. 

 LabeUum gibbous and adnate to the column at its base. — 6. Dipodium. 



Tribe III. Anther lid-like, incumbent, usually deciduous. Pollen-masses 

 waxy, 4 or 8, tapering at the base, separately attached and sessile on short 

 eaudicles, or on a short dichotomous caudicle. ' Terrestial with creeping or 

 rarely tuberous rhizomes or rarely epiphytes. Sepals and petals nearly equal, 

 free and spreading. Flowers often large. — 7. Cymbidium. 



Tribe IV. — ^Anther erect or bent forward, persistent but free from the ros- 

 tellum. Pollen granular or mealy. Terrestial herbs with simple stems bearing 

 one or more leaves or rarely leafless, and a single spike raceme or single flower. — 

 2. Pterostylis. 



Tribe VI. Anther adnate to the toft of the column over the stigma, the 

 cells usually forming two lobes. PoUeh-masses 2, granular, attached by 

 eaudicles to 1 or 2 glands or pouches over the stigma. Terrestial herbs, rhizomes 

 with annually renewed tubers. Stems simple leafy. Flowers spicate. — 1. 

 Habenaria. 



L HABENARIA, R. Bb! 



Stem leafy with broad leaves. Petals 2-partite. LabeUum with 3 narrow- 

 linear lobes. Anther connective as high as the cells. — 4. H. trinervis. 



Leaves narrow, near the base of the stem. Petals divided. Anther con- 

 nective, very much shorter than the ceUs. 



Lateral lobes of the labellum long and very narrow-Knear like the 

 middle lobe. 

 Leaves narrow-oblong. Spur of the labeUum above I in. long. — 



1. H. elongata. 

 Leaves Unear. Spur of the labeUum under J-in. long. — 2. H. 

 graminea. 

 Lateral lobes of the labeUum lanceolate-falcate ; middle lobe linear. 

 Spur longer than the sepals. — 3. H. ochroleuca. 



1. H. elongata, B. Bt. — ^Arnhem S. Bay, and islands ofi the coast of 

 Arnhem's Land, R. Brown. 



2. H. graminea, Lindl. — ( Var. arnhemica, Benth). Port Darwin, Schultz 

 (Nos. 162, 188) ; Port Essington, Armstrong. 



3. H. ochroleuca, R. Br. — Islands of the N. Coast, R. Brown. 



4. H. trinervis, Wight. — ^Port Darwin, Schultz (No. 828). 

 H. Holtzei, F. v. if.— Port Darwin, M. Holtze (No. 1056). 



2. PTEROSTYLIS, R. Br. 

 Nun- flower or Parson-in-the-pulpit. 



1. P. recurva, Benth. — ^N.A., Drummond ; Upper Hay River, Miss 

 Warburton. 



