94 



Additions to the Flora of South Australia. 



No. 8. 



By J. M. Black. 



[Read May 13, 1915.] 



Plate X. 



PoTAMOGETONACEAE. — Pectinella. The inspection of 

 further specimens leads me to believe that what I had classed 

 (Trans. Roy. Soc, S.A., xxxvii., 4) as two. forms of P. 

 antarctica are really two well-marked species. The distinc- 

 tion is as follows: — 



Foliis hrevihus (lamina 12-35 tnyn. longd, vagina 8-10 mm. 

 longd), pedunculis brevissimis, floribus femineis circulo bract- 

 eolarv.m cinctis, styli ramo extimo hifido. . . . P. antarctica . 



Foliis longioribus (lamina JfO-70 mm. longd, vagind 15-20 

 mm. longd), pedunculis conspicuis, floribus femineis ebracteo- 

 latis, styli ramo extimo indiviso. ... P. Griff ithii, sp. n. 



As regards pi. i. of vol. xxxvii., figs. 2 and 10 show 

 the female and male flowers of P. Griffithii; figs. 3, 4, 5^ 

 and 6 show the female flower of P. antarctica, but in No. 3 

 the peduncle is made too long. Fig. 10 shows the anthers 

 of P. Griffithii. In November, 1913, Mr. H. H. D. Grifiith 

 (after whom the new species is called) found at Henley Beach 

 the male and young female flower of P. antarctica : both are 

 almost sessile, whereas even in the very young female flower 

 of P. Griffithii the peduncle is twice as long as the ovaries. 

 Owing to the difference in length of the leaf and of the 

 sheathing-base the two species are distinguishable at a glance, 

 whether fresh or dried. Labillardiere's drawing shows that 

 his Ruppia antarctica was our P. antarctica, and the same 

 remark applies to Gaudichaud's description and figure of the 

 male flower. The outermost style-branch of P. antarctica is 

 again divided into two branches, and this species flowers a 

 couple of months earlier than the other. 



Gramineae. — Sporobohfs virginicus, Kunth., var. ^^^Z//- 

 dus, Benth. This slender form, very different from the 

 maritime type in appearance, has been gathered near the 

 River Murray in South Australia (exact locality unknown) 

 by S. A. White and H. H. D. Griffith. 



Chenopodiaceae. — Bassia inchoata, J. M. Black (see 

 Trans. Roy. Soc, S.A., xxxviii., 462). Professor Ewart 

 suggests that this new Central Australian species would be 



