1572 CXXVII. ORCHIDE^. [Microtis. 



between the stigma and the anther. — Lindl. Gen. and Sp. Orch. 395 ; Endl. 

 Iconogr. t. 15 ; Bot. Mag. t. 2377 ; Hook. f. Fl. Tasm. ii. 25 ; Eeichb. f. Beitr. 

 22 ; Fitzg. Austr. Orch. ii. Pt. 1. 



Hab.: FoH Bov/en, R. Brown ; BmaetfRWei-, F.v. 3hieller ; Bookhampton and neighbourhoodi 

 Bowman, O'Shanesy ; Moreton Bay, G. Stuart ; Stanthorpe to the border of N.S.W. 



The species extend to New Caledonia, the Indian Archipelago, and S. China. 



35. CORYSANTHES, R. Br. 



(From Iwrxjs, a helmet, and anthos, a flower.) 



Dorsal sepal erect, very much incurvSd and concave, hood-shaped or contracted 

 into a stipes ; lateral sepals and petals small, linear, sometimes minute. 

 Labellum erect under the galea, broadly tubular, the margin of the oblique 

 orifice either shortly recurved and denticulate, or produced into a large concave 

 denticulate or fringed lamina closely reflexed. Column short,, erect, variously 

 thickened under the stigma or winged. Anther erect, 2-eelled, the outer valves 

 large, the inner small ; pollen-masses granular, without any caudicle. — Dwarf 

 terrestrial herbs, with small underground tubers, and a single ovate-cordate 

 orbicular or reniform leaf, with a scarious sheathing bract below it. Flower 

 solitary, sessile within the leaf or very shortly pedicellate, with a small sub- 

 tending bract usually close to the leaf. 



The genus is also in New Zealand and the Indian Archipelago. The Australian species are 

 all endemic. 



Hood nearly erect. Labellum denticulate, tube long and narrow .... 1. G.pruinosa. 

 Hood almost horizontal. Labellum 2-spurred at the base, tube broad . . 2. G. bicalcarata. 



1. C. pruinosa (resembling the bloom upon some fruits), R. C'tinn. in 

 y.S.W. Mag. n. i. 1833; F. c. M. Fragm. ix. 49. Leaf green on both' sides. 

 Flower rather large -for the size of plant, purplish, except part of the outer side 

 of the dorsal sepals. Labellum contracted towards the base, slightly or shortly 

 denticular fringed, its upper portion dilated, curved forward and streaked, ovary 

 rather long. Column almost winged. Capsule slender ellipsoid. — Fitzg^ Austr. 

 Orch. i. Pt. 1. 



Hab.: Given as a Queensland plant by Z*. v. M. 



2. C. bicalcarata (2-spurred), R. Br. Prod. 328 ; Benth. Fl. Austr. vi. 351. 

 The stem often above lin. below the leaf, the leaf orbicular-cordate, often an inch 

 in diameter, and frequently almost transparent when dry showing besides the 

 midrib 1 or 2 circular veins on each side connected by the transverse reticulations. 

 Ovary long, cylindrical. Dorsal sepal very much incurved, very obtuse, not 

 contracted at the base ; lateral sepals and petals very small, linear-subulate, 

 sometimes minute or almost obsolete. Labellum-tube broad in the upper part, 

 incurved and concealed under the dorsal sepal, tapering at the base with 2 short 

 narrow-conical spurs, between which are the minute lateral sepals ; the orifice 

 oblique, with a recurved convex margin or lamina. Column thick and short, the 

 wings narrow, and a prominent gibbosity at the base between the column and 

 labellum.— Lindl. Gen. and 8p. Orch. 394 ; Conjhas aconitiflorm, Salisb. Parad. 

 Lond. t. 83 incorrect as to details ; Reichb. f. Beitr. 48 ; Fitzg. Austr X)rch i 

 Pt. 2. & • • •, 



Hab.: Biisbane River, Moreton Bay, Jr. Hill; Eockhamptou, Tliozet. 



36. PTEROSTYLIS, E. Br. 



{Pteron, a wing, and stylos, a column.) 

 Dorsal sepal broad, erect, incurved and very concave ; petals lanceolate falcate, 

 contracted at the base and attached to the basal projection of the column, falcate 

 and curved under the dorsal sepal, nearly as long and forming with it an arched 



