38 Dansk Botanisk Arkiv, Bd. 2. Nr. 8. 



Busselton in a dune-pan. It is distinct from T. cenlrocarpa sens. 

 lat., but very close to the following species, which perhaps is only 

 an extreme form of it. 



7. Triglochin Muelleri Buchenau, in Das Pflanzenreich, IV, 15 

 (1903) 12. 



In 1882 Buchenau (1. c. 509) mentioned a Triglochin collected 

 by Oldfield at Vasse River, W. A., and sent to him by F. v. 

 Müller, but it was not until 1903 that he, in his monograph, 

 described it. To Prof. A. J. Ewart I am indebted for a part of 

 the type collection. The plant in question (see PI. IV, Fig. 8) is 

 somewhat larger and coarser than the other species, as far as 

 possible to judge from the rather incomplete specimens. The 

 leaves are flaccid-filiform; the scapes, according to Buchenau, up 

 to 10 cm high, somewhat curved. They bear many, rather distant 

 flowers. The flowers and fruits are sessile or nearly so, and the 

 fruits (not fully ripe) are ovoid or elliptical, hardly 2 mm long; 

 they have rounded backs, a very minute apical part, and no 

 basal spur at all. 



The species is only known from the type collection, and from 

 specimens collected at Busselton by F. Stoward (Nov. 1912) and 

 sent me from the Nat. Herb, of New South Wales (exactly 

 resembling the type). Perhaps further investigations will, as said 

 above, result in its being united with T. trichophora. The geograph- 

 ical range of the two species seems to be the same (Vasse River 

 is not far from Busselton). 



The here given revision of the annual species of Triglochin 

 accepts 7 species, besides T. mucronata. All occur in West Australia 

 with the exception of T. turrifera. West Australia further harbours 

 T. striata Ruiz et Pav. and T. procera R. Br., both of which seem 

 to be common in the S. W. part of the state. Thus it has 9 

 species of the genus. 



The following key gives a synopsis of the differences between 

 the annual species: 



A Key to the Annual Species of Triglochin. 



A. Carpels with free apex, the three fertile ones with a reflexed apical 

 mucro; fruit turbinate T. mucronata. 



B. Carpels united up to apex; no apical mucro; fruit linear or pyramidal 

 to ovoid. 



a. Carpels with well developed, mostly incurved basal spurs: fruit 

 linear-pyramidal or pyramidal. 



a. Fruit linear-pyramidal, evenly tapering from base towards apex; 

 basal spurs incurved. 



