C. H. Ostenfeld: Contributions to West Australian Botany. I. 11 



At Carnarvon I found quite a number of specimens of a 

 Cymodocea cast ashore, and from the freshness of the leaves and 

 rhizomes it must be regarded as certain that the plant was grow- 

 ing at a short distance from 

 the beach. The specimens 

 collected (C. H. Ostenfeld, 

 Plantae ex Austr. occid. 

 No. 271) consisted of the 

 younger parts of the rhi- 

 zomes with leaves, roots 

 and, in some specimens, 

 the female reproductive 

 organs. 



At first I identified it 

 as C. rotundata Aschers, et 

 Schweinf., which, as quoted 

 above, was found floating 

 near the Montebello Islands 

 by Dr. Naumann in 1875. 

 But on closer examination 

 it soon became evident that 

 it differed considerably from 

 this species and did not 

 agree with any hitherto 

 described species. There- 

 fore I describe it as new, 

 the fourth species of the 

 subgenus Phycagrostis. 



As no later record of 

 C. rotundata from the coast 

 of West Australia is avail- 

 able, I consider its occur- 

 rence as doubtful and am 

 inclined to think that Dr. 

 Naumann's specimens also 

 belonged to my new spe- 

 cies, not to C. rotundata. 



C. angustata is related to C. rotundata, C. nodosa, and C. ser- 

 rulata, as will be seen from the diagnosis and from the following 

 description of the specimens collected (both herbarium and alcohol 

 material) : 



The creeping rhizome has elongated internodes; at each node 



Fig. 1. Cymodocea angustata n. sp. 

 To the left a specimen with an unripe 

 fruit, to the right another with a female 

 flower enclosed in the sheath. (*/a nat. size.) 



