215 



white, or whitish with a tinge of green, yellow, or light 

 prune, never the pure white of 1\ ocloratuin or 1' . album. 

 Ovary more slender than in 1'. fii-scmri, and not outstanding 

 from the axis of the spike as in that species. 



Lateral sepals about 4 lines, free, lanceolate, generally 

 slightly bidentate, narrowing gradually to tip ; not inflated 

 at base as in F. odoratu/in and P. alhuin; parallel, not di- 

 verging widely as in those species. 



Dorsal sepal rather less than 4 lines, ovate-lanceolate, 

 generally moderately recurved in the mature flower, especi- 

 ally in hot weather. 



Petals rather less than 3 lines, linear, spreading (some- 

 times markedly so). 



Lateral index about 75. 



Labellum very shortly stalked (almost sessile), ovate- 

 lanceolate, varying in degree of flexion from an obtuse to a 

 right angle, not acutely flexed as in P. odorat'um or P. 

 alhiiin: protruding slightly between lateral sepals; margins 

 slightly crenulated ; membranous portion greater than cal- 

 lous but not so markedly so as in P. odoratum and P. album. 



Lateral appendages broadly-linear with minute rounded 

 basal lobe, nearly but not quite as high as rostellum. 



Rostellum considerably higher than anther-case, bifid 

 when disc is removed. 



Anther-case with very short point, dark-brown, much 

 shorter than rostellum. 



Disc narrow-triangular. 



Stigmatic surface reniform, occupying entire width of 

 middle lobe of column just below rostellum. 



Caudicle strajD-shaped, of medium length, attached in 

 usual way. 



Pollinia 2, of usual form and attachment. 



It blooms in September and October, and is widely dis- 

 tributed on plains and hills and also on Kangaroo Island. 



13- P. fuscum, R. Br. PI. xiii.A, figs. 1 to 9. 



The following is a description of this variable species in 

 this State : — 



Plant of slender habit, from 9 to 18 in. high ; fistula 

 opening considerable distance below spike, often as much as 

 5 in. Lamina slender, reaching well up spike or beyond it. 



Spike not crowded, flowers about 13 to 24. 



Ovary (shown rather small in plate) relatively large in 

 comparison with the flower, shortly stalked, cuneate. 



■ Flowers generally green, sometimes greenish-yellow, 

 standing well out from axis of spike. 



