149 



D. punctata 

 I), pedunculata 



D. palustris 



in its short setaceous and relatively numerous leaves; in its 

 much smaller flowers and in its labellum, which is at least 

 as long as the dorsal sepal and bears two raised longitudinal 

 lines. 



Its relation to other South Australian members of the 

 genus is indicated in the following table : — 



Flowers not blotched or spotted on their upper 

 surface, but of a uniform colour. 

 Flowers purple or heliotrope (drying yellowish- 

 brown) ; lateral sepals greatly exceeding 



petals, about 5 cm. long 



Flowers canary-yellow ; lateral sepals only 



sHghtly exceeding petals 



Flowers yellow with conspicuous dark-brown or 



purple-brown markings or blotches. 



Lateral lobes of labellum large, as long or 



nearly as long as middle one. 



Lateral sepals greatly exceeding petals in 



length, often nearly twice as long; leaves 



6 or more, setaceous or almost so 



Lateral sepals shorter than, or approxi- 

 mating in length to the petals ; leaves 

 not setaceous. 

 Lateral sepals crossed ; blotches generally 

 distinctly demarcated from the yellow 

 ground-colour; 2 longitudinal raised 



lines at base of labellum 



Lateral sepals nearly parallel; flowers 

 wall-flower colour, dark blotches merg- 

 ing into yellow ground-colour ; 1 raised 



line at base of labellum 



Lateral lobes of labellum very much shorter 



than the middle one. 



Two raised longitudinal lines along base of 



labellum. 



Flowers with small dots and short linear 



markings ; leaves linear and rather lax, 



often 17 cm. long 



Flowers with 2 conspicuous brown dots at 

 base of dorsal sepal and conspicuous 

 oblong brown border round the raised 

 lines ; leaves usually more than 5, 

 setaceous or nearly so ; short (about 



7 or 8 cm.) .and very erect 



One longitudinal raised line along base of 

 labellum. 

 Flowers with similar markings to 2). 

 hrevifolia,' and in addition a brown 

 transverse blotch near the tip of middle 

 lobe of labellum ; leaves usually 2, 

 rarely 3, long, lax, linear D. sulphur ea 



D. maculata 



D. longifolia 



D. palachila 



D. hrevifolia 



Prasophyllum Brainei, n. sp. Planta viridis, gracilis, 

 12-24 cm. alta. Lamina folii basi dilatata, deinde anguste 

 linearis vel setacea, spicae circiter aequalis. Spica laxa, 5-10 



