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ADDITIONS TO THE FLORA OF SOUTH AUSTRALIA. 



By J. M. Black. 



[Read October 10, 1912.] 

 Plate VIII. 



This list includes a record of some alien plants which have 

 been recently found growing wild in our State, and the 

 description of two new species — an Acacia and a Goodenia — 

 collected near Tarcoola in June of this year by Mr. J. W. 

 Mellor during his ornithological visit to that district. The 

 introduced plants are distinguished by an asterisk. 



Crucifer^e. — *Eruca sativa, Lamk. (salad rocket). 

 Received from several parts of the State as a weed in 

 lucerne. — Mediterranean region. 



Leguminos^e. — Acacia tarculensis, sp. nova. Frutex, ramu- 

 lis resinoso - angulatis minute puberulis, phyllodiis 

 oblongo-lanceolatis vel oblongis coriaceis 25-50 mm. 

 longis arete multinerviis (ssepe nervis 3 evidentioribus) 

 linea resinosa crenulata decurrente marginatis plerumque 

 acumine recurvo terminatis, junioribus appresse albo- 

 pubescentibus, floribus pentameris, spicis axillaribus 

 patulis laxis brevissime pedunculatis saepius geminatis 

 phyllodio circiter dimidio brevioribus, spicse rhachi cano- 

 tomentosa, calyce 1J mm. longo pubescente lobis obtusis 

 tubo longioribus, petalis usque supra medium connatis 

 calyce vix duplo longioribus, bracteis concavis cum 

 acumine inflexo, ovario pubescente, legumine immature 

 sericeo, seminibus transversis. 



Tarcoola (J. W. Mellor, June, 1912). Belongs to 

 Bentham's series viii., Juliflorcb, subseries D, Falcated. Differs 

 from A. kempeana, F. v. M., in the angular branchlets and 

 smaller leaves with resinous margins and relatively shorter 

 corolla; from A. resinomarginea, W. V. Fitzg., in the broader 

 and shorter leaves, downy branchlets, peduncles and young 

 leaves ; from both in the long calyx-lobes and twin flower- 

 spikes. The unripe pods (15-23 mm. long) are on specimens 

 gathered in the Gawler Ranges in September by Captain A. 

 S. White. (Plate viii.) 



Composite. — Helipterum. pterochcetum, Benth. Speci- 

 mens in J. W. Mellor's collection from Tarcoola have 2-& 

 outer female flowers and about 14 bisexual flowers in each 

 head. Bentham (Fl. Aust., iii., 648) says: "Florets 15-20, 

 all apparently hermaphrodite." Helichrysum cinereum, F. 



