340 



very slender petioles ; stem-leaves bract-like, 4-5, sessile, acuminate, linear- 

 lanceolate, from 5-2 5 cm. long. Flower solitary, green with reddish-brown 

 apex of galea and tip of labellum, often 4 cm. between the extreme points. 

 Galea extended at the apex into a long filiform and very much decurved point. 

 Lower lip erect, cuneate, with a very wide sinus, its lobes often 4-5 cm. long, 

 prolonged on each side of the galea into long filiform points. Labellum on an 

 irritable claw about 2 mm. long, linear-oblong, very obtuse at the apex, the latter 

 recurved and protruding from the sinus; lamina about 11 cm. long, with a raised 

 longitudinal line down the middle ; appendix trifid, curved, penicillate. Column 

 about 1 1 mm. long, erect ; the upper angles of the wings produced into an acute 

 linear tooth ; the lower ones obtusely oblong. Stigma elliptical in the centre of 

 the column. 



The new species undoubtedly comes very close to PterostyUs ohtusa, Br., 

 but it blooms at a totally different period of the year in exactly the same locality, 

 and in the living plant it differs strikingly in the extreme decurvature of the 

 apex of the galea, a characteristic feature which is often lost in the process of 

 drying and pressing. 



Descriptions of the following orchids were published in English in Trans- 

 actions Royal Society South Australia, xliv. (1920), page 322, et seq. They 

 now appear in Latin in order to comply with the requirements of the Vienna 

 Congress : — 



Drakaea Jeanensis, n. sp. 



Gracillima, circiter 18-24 cm. alta. Folium orbiculare vel late ovato- 

 cordatum, circiter 25 cm. in diametro, subrigidum, glabrum. Flos solitarius ; 

 ovarium subpyramidale. Segmenta perianthii subaequalia, anguste linearia, 

 circiter 12 mm. longa; sepalum dorsale retroflexum; lateralia acute deflexa; 

 petala acute deflexa, apicibus decussatis. Labellum insectiforme, mobillimum, 

 ad apicem pedis columnae per unguem elongatum linearem articulatum ; lamina 

 circiter 12 mm. longa peltata, in duo lobis inaequalibus per constrictionem 

 villosissimam divisa ; lobus minor globosus, tuberculatissimus, hirsutissimus ; 

 lobus major substrictus convexus, prope unguem leviter pilosus, alibi levis, ad 

 apicem subovatus, marginibus subrevolutis. Columna gracillima, retroflexa, ad 

 apicem incurva, circiter 9 mm. longa, basi in pedem elongatum linearem producta, 

 ad basin 2-auriculis parvis triangularibus. Anthera magna obtusa ; rostellum 

 non prolongum. 



Western Australia: Ravenswood, near Pinjarra, Jean Scott Rogers, 

 1/10/19. 



Microtis truncata, n. sp. 



Gracillima, circiter 22-38 cm. alta. Folium anguste lineare ; fistula infra 

 medium ; lamina circiter 10-25 cm. longa. Spica circiter 12-25 cm. longa ; flores 

 subvirides dissiti, pedicellis brevibus. Sepalum dorsale ovatum, cucullatum, 

 erectum, apice acuto leviter recurvo, circiter 375 mm. longum 2'5 latumque ; 

 lateralia arte revoluta, oblongo-lanceolata, circiter 2'5 mm. longa. Petala erecta, 

 obtusa, lineari-falcata, circiter 275 mm. longa, sepalis angustiora. Labellum 

 paene oblongum, in medio contractum, marginibus leviter crenulatis, circiter 

 3'75 mm. longum, 5-nervosum; basi duo callis oblongo-ovalibus vel lunatis, 

 anteriore unico callo magno hastato incrassatum. Columna brevissima; anthera 

 minute mucronata, auriculis grandibus prominentibus. 



Western Australia: Diamond Tree School, near Jarnadup, Miss lima 

 Knox-Peden, December, 1918. 



Prasophyllum lanceolatum, n. sp. 

 Subgracilis, circiter 40-77 cm. alta. Lamina folii circiter 12-15 cm. longa, 

 spicam non excedens. Spica circiter 12-21 cm. longa ; flores sub-brunnei, dissiti, 

 ovaria brevia gracilia. Segmenta perianthii anguste lanceolata; sepalum dorsale 



