296 Ewart, White and Wood: 



raturalising itself in the Melbourne district. It does not appear 

 to be either actively useful or actively injurious, but is useless 

 for fodder, and has no known economic or poisonous properties. 



PoRANTHERA HuEGELii, Klotz. (Eupliorbiaceae). 



Lowden, Preston River, West Australia, Max Koch, Oct., 1909. 

 No. 194.3. 



Sagina apetala, L. (Caryophyllaceae). 



Lowden, Preston River, West Australia, Max Koch. Oct., 1909. 

 No. 1928. 



Sarga, Ewart, new genus. (Graniineae). 



Spikelets one-flowered on hliforui pedicels, in groups of .3. 

 One hermaphrodite spikelet being situated below 2 male spike- 

 lets, the rachis of each group of 3 spikelets being articulated 

 below the glumes of the hermaphrodite spikelet ; the part of 

 the rachis above the articulation foi'ming a sharp-pointed stipe 

 to the fruit. 



Glumes 3, the two outer unawned, and hardened when the 

 fruit is ripe, the flowering glume membranous and awned in the 

 hermaphrodite flower, unawned in the male flowers. 



Awn dorsal and persistent, and bent about one-third of its 

 length from the glume, the part below the bend being sjiirally 

 twisted. 



Stigma lobes covered all over with rather long processes. 



Caryopsis narrow, and enclosed in the persistent, hardened 

 sterile glumes. 



The genus belongs to the group Agrostideae (Engler and 

 Prantl). Owing to its having a membranous flowering glume, 

 it falls under sub-group B, and under the section d of Engler 

 and Prantl's Pflanzenfamilien, because the stigmatic lobe have 

 processes situated all round them. It belongs to the same 

 Sub-section as the genus Limnas, from which, however, it differs 

 in the following important respects: — 



(1.) In height and general habit Limnas is a short, slender 

 type of grass. 



(2.) All the spiivelets in Limnas are hermaijhrodite. and they 

 do not occur in definite groups of 3. 



