122 ORCHIDACEOUS FLORA OF QUEENSLAND 



to become deciduous above the expanded portion of the 

 petiole. Stem l^racts two or three, slightly hair}', 

 acuminate, membranous, forming a loose tubular sheath 

 towards their bases. Flowers small, sessile, hairy on 

 the outside, in a moderately crowded spike about 4-7.5 

 cm. long (occasionally reversed ?) ; 3-3.5 mm. long (not 

 including the ovary) ; bracts hairy awn-like, shorter 

 than the ovary. Perianth segments nearly equal, the 

 dorsal sepal connate with the petals to form a galea over 

 the column. Lateral sepals free, broadly lanceolate, 

 rather blunt, 3-3.5 mm. long, 1-nerved ; galea erect on 

 a wide base or slightly inclined forward, blunt, about 

 3 mm. long. Labellum inferior (occasionally superior i) 

 sessile, adnate to the base of the column ; cymbiform 

 in its lower half, suddenh^ contracted about its middle, 

 then aljruptl}^ dilated into a terminal expansion with two 

 large divaricate entire oblong lobes ; lamina traversed 

 by three longitudinal lines or nerves, a claw-like callus 

 on each side within the saccate portion near the base. 



Column-bed verj^ short, two-keeled anteriorly. 

 Anther ovate-lanceolate l^ehind the rostellum, rostrate, 

 the beak reaching as high as the latter. Rostellum deeply 

 bipartite ; segments slender erect, surmounted by a long 

 vertical linear- elliptical gland. Pollinia two, connected 

 AAith the gland by a common linear caudicle with inflexed 

 margins : gland readily detached from between the 

 segments of the rostellum. Stigmas (stigmatic lobes) two, 

 one on each side of the upper part of the column, separated 

 by the base of the rostellum, relativel}' large. 



Kamerunga (Barron River), E. Cowley ; Mackay, 

 L. J. Nucjent ; Daintree River, Giis. Eosenstrom. 



In addition, there is one sheet containing several 

 specimens, but with no particTilars attached as to locality 

 or name of collector. 



This Australian orchid rather closely resembles the 

 Asiatic species Z. flava Benth., of which it maj^ possibly 

 l)e a variety. In the material represented by it in the 

 Queensland National Herbarium all the plants are old, 

 and there is no information as to time of blooming. Some 

 of the specimens are in a state of advanced seed, and the 



