Daviesia daphnoides Meisner (1844: 54)

Crisp, Michael D., Cayzer, Lindy, Chandler, Gregory T. & Cook, Lyn G., 2017, A monograph of Daviesia (Mirbelieae, Faboideae, Fabaceae), Phytotaxa 300 (1), pp. 448-450 : 448-450

103. Daviesia daphnoides Meisner (1844: 54) , Bentham (1864: 79), Crisp (1995: 1185). Type: ‘In planitie arenosa Quangen (Victoria) d. 20. Mart. 1840. Herb. Preiss. No. 1144. (Drummond n. 225.)’ Lectotype (Crisp 1995: 1185): Preiss 1144 ( LD) ; isolectotypes: G (2 sheets) , MEL (2 sheets) , MO, NY (ex Herb. Meisn.), P, W. Syntype: Drummond 225 ( BM, ex Herb. Shuttleworth) ; isosyntypes: G (2 sheets) , K (2 sheets) , OXF, MEL, P (2 sheets), PERTH, W (2 sheets)

Bushy to spreading shrubs, to 1.5 m high and broad, glabrous, glaucous. Root anatomy unknown. Branchlets ascending, terete to tetragonal or triquetrous, ribbed. Phyllodes moderately crowded, ± erect, narrow-elliptic to - obovate, acute or acuminate, ± pungent, lamina sometimes oblique, tapered to the often petiole-like base, articulate, 25–68 × 4.5–9 mm, thickish when fresh, wrinkled with visible venation when dry. Unit inflorescences 1or 2 per axil, racemose, 2–6-flowered; peduncle 0.5–4.5 mm long; rachis 0.25–11 mm long; barren basal bracts oblong to triangular, up to 0.5 mm long. Pedicel thickening towards the apex, 0.75–3 mm long; subtending bracts rhombic to approaching oblong, keeled, hooded, ca. 0.75 mm long. Calyx ca. 4–4.25 mm long including the 1.5–2 mm stipe-like receptacle; upper 2 lobes united into a truncate lip, ca. 0.5–1 mm long; lower 3 lobes triangular, ca.

A MONOGRAPH OF DAVIESIA

Phytotaxa 300 (1) © 2017 Magnolia Press • 231 0.25–0.75 mm long. Corolla : standard transversely ovate, emarginate, 5–5.75 × 5–6 mm including the 1.25–1.5 mm claw, with a prominent central channel, yellow surrounding a large dark red emarginate blotch with an inconspicuous greenish linear central mark, fading to paler yellow and grey; wings obovate with a rounded apex, uncinate auricles, saccate, 5.5–6 × 2.5–3 mm including the 1.25–1.5 mm claw, dull red grading to orange or yellow

232 • Phytotaxa 300 (1) © 2017 Magnolia Press

CRISP ET AL.

at the tip and margins; keel half broadly elliptic, acute, auriculate, saccate, ca. 4 × 1.75 mm including the 1 mm claw, dark red. Stamens slightly dimorphic: inner whorl of 5 with longer, slender filaments and subversatile anthers; outer whorl of 5 shorter with broader filaments and basifixed anthers; filaments all compressed and lightly cohering; anthers all 2-celled. Pod obliquely shallowly (rarely very shallowly) obtriangular with a long, tapering, acuminate apex, turgid, thick-walled 15–21 × 6–11 mm; upper suture sigmoid to almost straight; lower suture acute. Seed globose (plump), red-brown with a white, continuous aril. ( Fig. 104 ).

Flowering period:— April to July. Fruiting period: August to October.

Distribution:— Western Australia from Walkaway (south of Geraldton) south to the eastern wheatbelt, east of Perth.

Habitat:— Gravelly sand in undulating terrain in kwongan heathland.

Selected specimens (32 examined):— WESTERN AUSTRALIA. Irwin : 42 km W of Winchester, 29°49’S, 115°34’E , C. Chapman (1)76, 7 May 1976 ( AD, CBG, MEL, PERTH); 37 km W of Yandanooka , 29°19’S, 115°34’E , J. S. Beard 7235, 31 October 1974 ( PERTH); intersection of Green Head Road and Brand Highway, 30°04’S, 115°20’E , M. D. Crisp 5408, 24 January 1979 ( CBG). Avon : 4 km N of Wongan Hills town, 30°51’S, 116°43’E , M. D. Crisp 6524, 17 July 1980 ( CBG, MEL, PERTH, US); NW outskirts of Wongan Hills township between Piawaning Road and railway line, 30°49’S, 116°37’E , M. G. Corrick 9281, 14 October 1984 ( CANB, MEL). Darling : Mogumber Mission, 31°02’S, 116°02’E , A. S. George 6202, 12 April 1964 ( PERTH) .

Affinity:— This species is closely related to D. emarginata ( Fig. 1B ), with which it shares a similarity in general aspect, as well as details of the reproductive structures. The most obvious difference is seen in the phyllode apex, which is obtuse and emarginate in D. emarginata , but acuminate and pungent in D. daphnoides .

Figures

FIGURE 1A. Phylogeny (part) of Daviesia estimated using maximum likelihood (PHYML) from concatenated sequences of ITS (nrDNA), and ndhF and trnL–trnF (cpDNA). The tree was rooted using the monotypic sister groups Viminaria and Erichsenia (not shown). The informal clade names are used for reference in the taxonomic treatment. Numbers on branches show non-bootstrap support. The tips are labelled with the taxon name and sample accession number.

FIGURE 104. Daviesia daphnoides. A. Flowering branchlet. B. Inflorescence. C. Pod. A, B from Crisp 6524; C from Crisp 5408. Drawn by B-J. Osborne.