183 



Near waterholes a.nd on the plains at Marree. Nearest to 

 M. mtegerrima, Benth., but the leaves are broader, more 

 acute (almost acuminate), and more rigid, the involucre larger 

 and 'the bracts with a spreading point. The axils both of the 

 leaves and branches are usually woolly. The leaves closely 

 resemble those of Ixiolaeua leptolepis, Benth. The new species 

 differs from all previously described Mintirias in the very 

 short pappus of the rayflowers. The bristles only equal one- 

 fourth of the ripe achene in length, whereas in the other 

 species they are always longer than and often twice as long as 

 the achene. 



Helipterum uniflorum , J. M. Black. Marree. Numbers 

 of the detached woolly fruiting heads were found clinging to 

 the stellate-hairy under-surface of the leaves of Solan um 

 lacunarium, F. v. M. 



H. microglossum, (F. v. M.) Tate. Hawker. 



Vittadinia scabra, DC. Marree. First record for South 

 Australia, although it has already been found in the southern 

 end of the Northern Territory. There is nothing to dis- 

 tinguish this species from forms of V. australis with thick, 

 obovate, scabrous leaves except the pubescent ribless achenes. 



V. australis, A. Rich., var. pterochaeta, F. v. M. 

 Hawker (Miss Read). 



*Sonchus asper, Hill. "Rough Sowthistle." Hawker; 

 Melrose; Keith; Nantabibbie. A stout plant, standing 

 50-150 cm. high, with prickly leaves. *S. oleraceus, L., is. 

 also common on the plains at Hawker. 



*Centaurea melitensis, L. This weed ("Maltese Cock- 

 spur") is very common near Leigh Creek. 



*Onopordon acaule, L. Yunta. Common on the flats 

 subject to inundation from the creek. 



DESCRIPTION OF PLATES. 



Plate XV. 



Miiehlenbeckia coccoloboides, n. sp. 1, portion of male 

 plant. 2, portion of female plant. 3, male flower (side view). 

 4, the same (viewed from above). 5, stamen (front). 6, stamen 

 (back). 7 and 8, female flowers. 9, vertical section of No. 7 : 

 a, epidermis of perianth ; b, fleshy layer of perianth ; c, the 

 connate sterile stamens surrounding the ovary ; d, wall of ovary ; 

 e, erect ovule. 10, pistil. 11 and 12, fruiting perianths showing 

 the ovoid and globular forms. 13, vertical section of nut and 

 seed : /, pericarp ; g, war ted testa of seed ; h, albumen ; i, curved 

 embryo; j, base of fruiting perianth. 14, nut. 15, transverse 

 section of seed (lettering as in No. 13). 16, sketch showing habit 

 of plant. 



