N.S. Lander, Olearia (Asteraceae: Aslereae) 
151 
Other specimens examined. WESTERN AUSTRALIA: W of Kukerin, AM. Ashby 5235 (AD, 
CHR, K, MEL, NSW, NT, PERTH); 5.5 km NE of Clyde Hill, 33° 17’ 35” S, 123° 00’ 54" E, M.A. 
Burgman 1792 (PERTH); Lake King, 72 miles [1 16 km] E of Lake Grace, Nov. 1980, N. Steedman 
s.n. (BM, PERTH); Lake King road, E. Wittwer 173 (KPBG, PERTH); Dowels-Lake King road, 32° 
40’ S, 120° 30’ E, E. Wither 1435 (KPBG). 
Etymology. The specific epithet draws attention to the narrowly lobed leaves characteristic of this 
taxon. 
Notes. The patent, septate eglandular hairs and the glandular hairs found on the vegetative parts of 
this plant place it in Olearia section Merismotriche Archer ex Benth. 
In the handbook of Grieve & Blackall (1975) specimens of this species will key (with difficulty) 
to O. rudis (Benth.) F. Muell. ex Benth. O. laciniifolia can be distinguished from the latter by the 
vestiture of its vegetative surfaces, which comprises glandular as well as eglandular hairs; by its 
conflorescences, which are solitary-headed rather than compound corymbose; by its ray, which 
comprises 35-43 rather than 39-75 florets; by its disc, which comprises 53-90 rather than 86-241 
florets; and by its pappus, which comprises c. 20 long brisdes only rather than 31-42 long bristles 
with 10-14 much shorter ones. 
Olearia mucronata Lander, sp. nov. (Figure 5) 
Species nova ad Oleariam sectionem Adenotrichum pertinens; foliis sessilibus, planis, linearibus 
vel anguste obovatis, scleris, integris, mucronatis et crystallis ("druses") characteristicis in floribus 
radii discique facile distinguitur. 
Typus: Wittenoom area [precise locality withheld]. Western Australia, January 1972, McGuire 18 
(holo: PERTH). 
Shrub to 1 m high, strongly and unpleasantly aromatic. Vestiture of vegetative surfaces with 
multicellular, uniseriate, simple eglandular hairs and multicellular, biseriate, capitate glandular 
hairs. Stems erect, pale green when young, becoming reddish, subglabrous with eglandular hairs. 
Leaves alternate, crowded, ascending, sessile; lamina flat, linear, sometimes obovate, 13-46 x 1-5 
mm, concolorous, dark green, reticulate; venation with distinct midvein only; vestiture uniformly 
subglabrous with eglandular hairs; texture sclerous; base attenuate; margin entire or with a few 
teeth; apex acute, mucronate. Heads terminal, solitary, pedunculate, conspicuously radiate, 
6.4-13.7 mm diameter; disc 1.0-1. 7 mm diameter. Peduncle to 23 mm long, subglabrous with 
eglandular hairs, with several leaflike bracts grading into those of the involucre. Involucre 
campanulate; bracts 5-seriate, 3.5-5.5 x 0.7- 1.0 mm. Outer involucral bracts somewhat cymbiform, 
narrowly triangular; stereome yellowish, vesicular along midrib and weakly glandular abaxially; 
margin narrowly membranous, minutely fimbriate; apex acuminate. Inner involucral bracts 
narrowly ovate, flat; stereome pale yellowish, vesicular along midrib and glabrous abaxially; 
margin broadly membranous, fimbriate; apex acute. Receptacle weakly convex. Ray florets 9-12, 
uniseriate, female, 14.7-15.5 mm long; limb narrowly elliptic, 5.4-14.0 x 1.4-2.5 mm, white, 
glabrous or subglabrous with multicellular, biseriate, simple eglandular hairs abaxially, obtuse and 
entire or minutely 3-lobed apically; staminodes sometimes present; stylar arms filiform, 1. 8-2.4 mm 
long. Disc florets 39-45, bisexual, buccinatc, 6.8-7.0 mm long, yellow, glabrous; lobes 0.9-1. 3 mm 
long, narrowly acute; anthers basally acute and shorter than the filament collar, with ovate, sterile 
terminal appendage, obtuse apically; filament collar c. 0.7 mm long; stylar arms filiform, with 
narrowly half-ovoid, sterile terminal appendages 2.8-3.0 mm long bearing minute collecting hairs 
above the stigmatic lines. Achene narrowly obovoid, somewhat flattened, 3.0-3.4 x 0.8-1.0 mm, 
sericeous with duplex hairs; venation indistinct; carpopodium central. Pappus uniseriate, with 
19-27 free, minutely barbellate bristles more or less equal in length to the tubular florets. 
Flowering period. August to January. 
