818 LXV. COMPOSITyE. ' [Pluchea. 



with only 2 or 3 disk-florets, in others those of the disk at least as numerous as 

 the female ones. Corollas of the disk 4-toothed. Style with 2 filiform papillose 

 branches. 



Hab.: Broadsound, E. Brown ; heads of Isaacs River, Bownmn ; Eockhampton, Tliozet. 



4. P. baccharoides (Baccharis-like), F. r. M. Herb.; Benth. Fl. Austr. iii. 

 528. A much-branched erect shrub of a few feet, glabrous and somewhat 

 glutinous. Leaves narrow-linear, mostly acute, ^ to lin. long, rather thick, 

 quite entire. Flower-heads small, sessile or shortly pedunculate in terminal 

 leafy panicles, almost unisexual, the males with ovoid involucres about 2 lines 

 long, the florets chiefly hermaphrodite but sterile, the females narrower and 

 longer, the florets chiefly filiform and shorter than the pappus. Involueral 

 bracts in both dry, much imbricate, minutely ciliolate. Style in the males 

 undivided. Pappus bristles not numerous. — Spiropodium baccharoides, F. v. M. 

 Fragm. i. 34. 



Hab.: Suttor Eiver, i''. v. Mueller; Belyando Biver, Mitchell, 



This species at first sight much resembles some of the common S. American Baccharises, 

 allied to B. paniculata, DC, but differs in its terete not angular branchlets, in the shorter florets, 

 in the tailed anthers, and in the heads not perfectly dioecious. I have always found a few 

 central hermaphrodite sterile florets in the female heads and a few filiform female florets in the 

 male heads. — Benth. 



5. P. Syrea (after E. J. Eyre), F. r. M. Rep. Babb. E.vped. 11 and 12 ; Benth. 

 Fl. Aiistr. iii. 528. A glabrous perennial or undershrub, often under 1ft. high, 

 ■ffith erect virgate branches paniculate at the top. Leaves mostly linear, erect, 

 boridered by a few small teeth, under fin. long, more or less decurrent along the 

 stem, a few on the main stem lanceolate and broadly decurrent. Flower-heads 

 small, usually numerous, in little corymbs of 3 to 5 each. Involucres broadly 

 ovoid or hemispherical, the bracts much imbricate, narrower than in the pre- 

 ceding species, the inner ones 2 lines long with subulate points. Female florets 

 very numerous, scarcely thicker than theTiristles of the pappus ; disk-florets also 

 numerous, with an undivided exserted style. Anther-tails minute. Achenes 

 terete or nearly so. — Eyrea rixhelliflora, F. v. M. in Linnsea, xxv. 403. 



Hab.: Islands of the Gulf of Carpentaria, Keppel Bay and Broadsound, R. Brman ; in the 

 interior, Mitchell. 



6. P. dentex (leaves toothed), li. Br. Herb.; Benth. Fl. Aimtr. iii. 529. 

 Erect, much branched, with a hard almost woody base, 1 to 2ft. high, viscid and 

 minutely pubescent. Leaves linear, mostly above lin. long, remotely toothed or 

 pinnatifid with short distant lobes, the upper ones small and entire. Flower- 

 heads larger than in P. Eyrea, Involucres hemispherical, the bracts very 

 narrow, the inner ones with a fine hair-like point, a few of the outer ones 

 greener and more recurved. Female florets very numerous, those of the disk 

 usually few. Achenes pubescent. 



Hab.: Broadsound and Thirsty Sound, iJ. Bjwun ; sources of Gilbert Biver, F. v. Mueller; 

 Port Denison, Fitzalan ; Springsure and other inland localities. 



22. PTERIGERON, DC. 



(Referring to the dry winged pappus.) 

 (Streptoglossa, Steetz ; Oliganthemum, F. v. M.) 

 Involucre hemispherical or ovoid, the bracts imbricate in several rows, usually 

 dry and rigid or the outer ones herbaceous, the innermost narrow, acute, often 

 coloured at the tips. Eeoeptaole without scales. Florets of the circumference 

 numerous or few, female, ligulate or, if tubular, less regularly or more deeply 

 lobed than those of the disk ; disk-florets numerous or few, hermaphrodite, fertile 

 or sterile, usually 5-lobed. Anthers with fine tails. Style bulbous at the base, 



