o. Prasophyllum. ORCHID ACE AE. 125 



of the apex of the rostellum. Stigma large, prominent, somewhat pentagonal. Caudicle 

 rather long. Pollinia 2. bilobed. 



Mount Compass ; Myponga ; Mount Lofty Range : Glenelg River ; Kangaroo fslancl ; 

 also from all other Australian States. Dec. 



2. P. occidentals {western), Rogers. Rather dwarf, 12-20 cm. high. Fistula of leaf 

 high up, sometimes just below the spike ; leaf-lamina greatly exceeding the spike. Flowers 

 rather small, green, sessile or almost so ; ovary short and turgid ; in a moderately loose 

 spike of 10-16 flowers. Dorsal sepal erect or retracted, ovate -lanceolate, about 5 mm. 

 long, very acute, concave ; lateral sepals lanceolate, slightly bidentate, nearly 6 mm. 

 long, concave on their inner surfaces, united for about three-quarters of their length in 

 the freshly expanded flower, but sometimes quite free in the older flower, especially in 

 very hot weather. Petals nearly same length as the dorsal sepal, lanceolate, erect or 

 slightly spreading. Labellum sessile, acutely or abruptly reflexed about the middle, ovate- 

 cuneate, about 5 mm. long and 2-6 mm. wide ; erect portion almost orbicular with entire 

 margins, slightly bulging at the base ; reflexed part oblong-cuneate with crisped or 

 crenulated edges and acute tip ; callous plate not very prominent until beyond the bend, 

 then contracted into a much narrower and more elevated apical extension and ending 

 abruptly midway between the bend and the tip ; membranous part about equal in extent 

 to the callous. Column very short and wide. Anther with very short point, about same 

 height as rostellum. Lateral appendages erect, oblong, with obliquely truncated tips, 

 about as high as rostellum, the basal lobes reaching to about their middle, adnate below 

 the stigma to the sides of the stigmatic-plate. Stigma transversely reniform. Caudicle 

 of medium length. 



Streaky Bay. End of Sept. 



3. P. elatum {tall), R. Br. The most robust member of the genus, ranging in this 

 State from 45-120 cm. high. Leaf -lamina usually rather short, but occasionally exceeding 

 the spike ; the whole plant varying in color from a pale-green to dark-purple or almost 

 black. Flowers large sessile, on a narrow elongated terete ovary. Dorsal sepal lanceolate, 

 about 10| mm. long, moderately acute, concave, erect or recurved ; lateral sepals united 

 from about the middle almost to the tips, falco-lanceolate, about 10 mm. long. Petals 

 about the same length but much narrower, falcate-lanceolate, generally spreading. 

 Labellum sessile, not bulging at the base ; ovate, about 8 mm. long and 6J mm. wide, 

 slightly recurved from about the middle ; basal margins entire, those in front corrugated ; 

 callous part ovate, occupying most of the lamina and ending about midway between the 

 bend and the tip, with free crenulated lateral margins united anteriorly. Anther erect, 

 2-celled, with a short acute point, of varying height but usually at the same level as the 

 rostellum. Rostellum long and narrow, with a large ovate disk. Pollinia 2, deeply 

 bilobed, attached to the disk by a rather long caudicle. Lateral appendages bluntly 

 linear-falcate, very long, much exceeding the rostellum, with a small thickened basal lobe, 

 not adnate to the stigmatic-plate. Stigma prominent more or less rounded or shield-like. 



N.P. and other parts of Mount Lofty Range ; Port Victor district ; Beetaloo ; Moonta ; 

 Cummins ; Yeelanna ; Kangaroo Island ; also all other States except Queensland. 

 Oct. -Nov. 



4. P. gracile {slender), Rogers. Slender, usually upwards of 30 cm. high. Leaf- 

 lamina shorter than the spike. Flowers yellowish-green, more rarely dark-purple, 

 arranged in moderately loose spike. Dorsal sepal about 10 mm. long, ovate-lanceolate, 

 incurved ; lateral sepals about 11 mm. long, united in their basal third in freshly expanded 

 flowers, subulate, with bidentate points, narrow. Petals about 9 mm. long ; linear- 

 lanceolate, tips incurved. Labellum on a well-marked claw, recurved but not acutely 

 near the middle ; erect part deeply concave with entire margins ; the part in front of the 

 bend narrow, triangular with sharp point, margins slightly undulate with marked con- 

 striction a little beyond the bend ; membranous part white and glandular, nearly equal 

 in extent to the callous portion ; the latter raised in front of bend and ending abruptly 

 ju3t beyond the constriction, but not reaching the tip. Anther with short erect point, 

 hardly as high as rostellum. Pollinia 2, each longitudinally furrowed. Caudicle of 

 medium length. Lateral appendages falcate with blunt tip and rather narrow basal lobe, 

 nearly as high as rostellum ; adnate to the base of the stigmatic-plate below the stigma. 

 Stigma reniform. 



Sandergrove ; Bridgewater ; also Victoria (Grampians). Late Oct. -Nov. 



5. P. constrictum (referring to lateral constriction of labellum), Rogers. A slender 

 species about 30 cm. high. Leaf-lamina about as high as the spike. Flowers sessile, 

 prune-colored, in a rather crowded spike. Dorsal sepal broadly lanceolate, very acute, 

 concave, incurved over anther, about 7 mm. long ; lateral sepals stout, united to their 

 middle, markedly bidentate, about 8 mm. long. Petals rather spreading, lanceolate, 

 about r 6\ mm. long. Labellum sessile or practically so, prune-colored, nearly 6 mm. long ; 

 recurved (but not abruptly so) rather beyond the middle ; erect part ovate or oval, not 

 bulging, with entire margins ; recurved part suddenly constricted at the bend and ending 

 in an acute tip ; callous portion not exceeding the membranous and not conspicuously 



