FLORA OF WESTERN AND NORTH-WESTERN AUSTRALIA. 249 
punctatis excellentem cl. Burges anno 1860 in Australia meridionali- 
occidentali collegit. Ad formam hane proxime accedunt specimina a cl. 
E. Pritzel in Australia oocidentali in distr. N. West Plantagenet in arenosis 
m. Nov. 1901 lecta (sub numero 956) et pro D. pauciflora declarata, quee me 
judice pro varietate propria salutanda sunt. 
Cl. L. Diels et O. H. Sargent certe non immerito monuisse videntur cl. 
Bentham sub D. setacea duas species distinctas (sed valde affines) conjunxisse, 
i.e. D. setaceam veram carinis labelli duabus in unam apice confluentibus 
distinctam et D. ear/natam, Lindl. (Lindley, Gen. & Spec. Orchid. p. 510) 
labello uniearinato discernendam. 
Озу. Н. Sargent (Systematic Notes on Orchidacez, Journ. West Austr. 
Nat. Hist. Soe. p. 66, 1909) D. setaceam et emarginatam pro speciebus 
distinctis et formas intermedias pro hybridis habet. Sed annotationes cl. 
Sargenti optimum preebent testimonium formas has certis limitibus haud 
distinctas esse. Dicit enim: “ D. emarginata, Closely resembles the last- 
named (1. e. setacea and carinata), but taller, stouter, and larger flowered. 
Leaves semiterete. Petals without spots, often emarginate. Middle lobe of 
labellum somewhat spreading. Both this species and carinata inhabit 
swampy places and flower in October. They often occur together, when 
intermediate forms, which I think must be hybrids, are found amongst 
them.” 
D. palachila a cl. R. 8. Rogers in Trans. Hoy. Soc. B. Austral. xxxi. 
(1907) p. 209 descripta et in tabula xxvi. delineata, quam cl. auctor 
D. setacew proxime affinem declarat, species sui juris et sat distincta esse 
videtur. 
D. LONGIFOLIA, R. Br. (Bentham, vi. 331 ; Diels, Fragm. 118). 
W. Australia: Bridgetown usque Kojonup et Slab Hut Gully, coll. A. 
A. Dorrien-Smith, 1909. 
In monte Toolbrunup collegit cl. A. A. Dorrien-Smith formam ^. longi- 
folie gracilem primo aspectu a typo valde aberrantem, caulibus humilibus 
D 
1 dm. vel paulo plus altis unifloris vel bifloris, foliis angustis curvatis 
distinctam sed in typum specimine unico elatiori (ca. 25 cm. alto) trifloro 
abeuntem. 
D. LONGIFOLIA, R. Br., var. CORYMBOSA, Domin, comb. n. (Lindl. pro sp.). 
W. Australia: Mallet ; Slab Hut Gully usque Kojonup et Bridgetown, 
coll. A. A. Dorrien-Smith, 1909. 
D. corymbosa (Lindley, Swan Riv. Append. 51, Gen. & Spec. Orch. 511), 
quam cl. Bentham cum J). longifolia junxit, certe est varietas sui juris, a var. 
typica floribus magnis, petalis latioribus ete. facile distinguenda. 
