Victorian Plants. 453 



CAUSTXS. 



1923. Spikelets unisexual. 



Rather tall ; flowering branches slender, hardly or only 

 moderately curved ; spikelets rather large ; stamens 

 generally four ; fruit turgidly ovate, the persistent por- 

 tion of the style shorter. C. restiacea. 



Spikelets bisexual 1924 



1924. Flowering branches much curved. 



Somewhat or quite tall ; branches usually fascicular, very 

 thin ; stem-leaves about as long as their stalk or shorter ; 

 spikelets slender, glabrous ; bracts pointed ; stamens 

 generally three ; fruit ovate-globular or ellipsoid, the 

 persistent portion of the style about as long. 



C. flexuosa. 

 Flowering branches hardly curved. 



Finally tall ; branches robust, unilaterally flattened or 

 somewhat channelled ; spikelets rather large ; bracts ex- 

 ternally beset with a subtle vestiture ; stamens generally 

 five in the pistillate flower, less in the other ; anthers 

 brown, pointed ; stigmas occasionally four ; fruit ellipsoid, 

 the thick persistent portion of the style shorter. 



C. pentaudra. 



GAHNIA. 



1925. Leaves undeveloped. 



Rather dwarf and even occasionally minute ; stems slendei, 

 quite straight, cylindrical ; leaf-stalks close, bearing merely 

 a rudimentary leaf, none or only one towards the middle 

 of the stem ; panicle very short, spikelike-contracted or 

 quite spicate ; floral bracts brownish ; stamens three ; 

 fruit turgidly ovate, somewhat black. 



(Cladium junceum.) G. jtincea. 



Leaves developed ... ... ... 1926 



1926. Stems and leaves hollow, with distinct transverse 



partitions. 



Very tall ; leaves stem-like, robust, cylindrical, the principal 

 floral leaf continuing the stem ; panicle long, repeatedly 

 compound, spikelets scattered ; floral bracts brownish ; 

 stamens and stigmas three ; fruit trigonous-ovate. 



(Cladium articulatum. ) G. articulata. 



Stems and leaves solid, with faint or without any 

 transverse partitions ... ... ... ... 1927 



