150 ORCHID ACEAE. 19. Pterostylis. 



tip multipartite ; lamina almost straight, with a rather broad longitudinal raised line 

 down the centre. Column erect, about 10 mm. long, the upper angles of the wings very 

 acute and higher than the anther, lower lobes broad rounded with ciliated margins. 

 Stigma tumid, oval. 



Bugle Ranges ; also all Eastern States, including Tasmania. June-Aug. 



2. P. eurta (shortened, referring to the tips of lateral sepals), R. Br. Slender, glabrous, 

 10-20 cm. high. Leaves on rather long petioles, in a radical rosette, 3-6 cm. long, lamina 

 elliptical to oblong-elliptical. Stem-bracts usually 2, loosely sheathing ; also a very 

 loose bract subtending the flower-pedicel. Flower solitary, green, with rusty-colored 

 labellum. Galea 3-3^ cm. long, erect, acute but not acuminate. Lower lip with a wide 

 sinus, the lobes shortly acuminate, not as long as the galea. Labellum on a movable 

 claw attached to the projecting foot of the column, about 14 mm. long (without the claw), 

 entire, somewhat oblong-linear but twisted and wider towards the tip, only slightly 

 recurved, the tip blunt and showing through the sinus ; lamina traversed throughout 

 by a raised longitudinal line ; appendage linear, curved, multifimbriate. Column vertical, 

 about 20 mm. long, adnate posteriorly to the dorsal sepal ; wings prolonged at the upper 

 angles into fine linear points, the lower lobe oblong with ciliate internal margins. Anther 

 horizontal or almost so, quite blunt. Stigma elliptical or ovate-elliptical, situated in the 

 middle of the column, not viscid. Rostellum very viscid. 



N.P. and other parts of Mount Lofty Range ; Para Para ; Barossa ; Millicent ; also 

 all Eastern States including Tasmania. Aug-Oct. 



3. P. nutans (nodding), R. Br. Slender, glabrous, 7-20 cm. high. Leaves rosulate 

 on rather long petioles ; lamina oblong-lanceolate to ovate, 1^-2^ cm. long. Stem-bracts 

 loosely sheathing, usually 3, in addition to that subtending the floral pedicel. Flower 

 solitary, green, deflexed or nodding. Galea 12-14 mm. long ; erect at base but abruptly 

 curved downwards towards the apex ; terminating in an acute point or frequently with 

 the tip of the dorsal sepal recurved, exposing the tips of the petals. Lower lip erect, 

 the lobes with short acuminate points emb:acing the tip of the galea. Labellum pro- 

 jecting through the sinus of the lower lip, on a movable claw attached to the foot of the 

 column, about 15 mm. long (including claw), oblong-linear, semicircularly recurved, 

 with blunt tip ; lamina pubescent, green, with a rather broad raised brown central line 

 extending to the tip ; appendage linear curved, penicillate. Column very much incurved, 

 about 15 mm. long ; upper angles of wings rounded, with a linear tooth ; lower lobes 

 of wings bluntly oblong-falcate, the anterior margins inturned and ciliate. Anther 

 incumbent, very blunt. Stigma very long and narrow, pointed at both ends, not viscid. 

 Rostellum very viscid. 



Mount Barker ; Cherry Gardens ; Dingabledinga ; Delamere ; Millicent ; Hundred 

 of Goyder ; Kangaroo Island; also all Eastern States, including Tasmania. Sept. -Oct. 



4. P. nana (dwarf), R. Br. (PI. 9, ii. ; figs. 6-11.) A rather diminutive species, usually 

 5-10 cm. high. Leaves rosulate at the base of stem, petiolate; lamina ovate, elliptical or 

 oblong-elliptical. 10-15 mm. long. Stem-bracts usually loose, acute, sheathing ; a similar 

 bract subtending the floral pedicel. Flower solitary, green, Galea erect, 12-15 mm. 

 long, broad and obtuse at the apex. Lower lip erect ; lobes separated by a broad truncate 

 sinus with an inflexed central tooth (fig. 11, t.). produced into long erect linear points 

 embracing the galea and much exceeding it. Labellum oblong, with a very blunt and 

 slightly recurved tip, attached to a short linear movable claw ; lamina 4-5 mm. long, 

 traversed by a central longitudinal ridge (fig. 6), bearing at its base a curved linear 

 appendage with a trifid tip. Column erect, about 8 mm. long, adnate posteriorly at the 

 base to the dorsal sepal ; the wings (figs. 8, 9, w) with an acute upper angle, the lower 

 lobe oblong, obtuse with inturned hairs. Rostellum (fig. 10, r.) forming a viscid cushion in 

 front of the clinandrium between the 2 pairs of pollinia. Stigma elliptical, not glutinous. 



N.P. Distributed widely in this and all the other States but Queensland. July-Oct. 



5. P. Vereenae (after Miss V. Jacob, its discoverer), Rogers. Rather slender, glabrous, 

 10-15 cm. high. Leaves rosulate at the base, usually sessile but sometimes shortly 

 petiolate. ovate-lanceolate or elliptical ; a very large leaf -like bract near the base of 

 stem and a similar one subtending the floral pedicel, both broadly lanceolate and sheathing 

 at their bases. Flower green, solitary, Galea about 1 cm. long, erect,' abruptly curved 

 forwards towards the end, terminating in rather an acute depressed point. Lower lip 

 enclosing an acute sinus without an inflexed tooth ; its lobes produced into fine points 

 embracing the galea and exceeding the latter in length. Labellum on a movable claw, 

 linear-oblong, with a very blunt and moderately recurved tip protruding from the sinus ; 

 lamina about 10 mm. long, traversed throughout by a broad raised central longitudinal 

 line ; the basal appendage curved, linear, trifid at the end. Column about 12 mm. long 

 erect ; upper angle of the wings produced into an acute tooth, lower angle into a ciliate 

 blunt linear-oblong lobe. Stigma rather widely elliptical, tumid. 



Cherry Gardens. Sept. 



