Daviesia corymbosa Smith (1805: 507)

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

44. Daviesia corymbosa Smith (1805: 507) , Bentham (1864: 76), Crisp (1991a: 290), Crisp (1995: 1183), Crisp (2002: 525). Type: [Port Jackson]. Holotype: ‘Hawksbury river, N. S. Wales, coll. Paterson, [ex Herb.] J. Banks, 1798’ (LINN)

Daviesia macrophylla Endl. in Endlicher & Fenzl (1839: 15). Type: ‘Colitur in horto Hugeliano.’ Lectotype ( Crisp 1991a: 290): W (sheet bearing a fertile specimen with three phyllodes); isolectotype: W (sheet with a single phyllode).

Slender, multi-stemmed, open shrubs, to 2 m tall, glabrous. Root anatomy unknown. Branchlets ascending or arching, angular, lightly ribbed, usually with lower nodes leafless. Phyllodes scattered, ascending, obovate, elliptic or ovate, usually narrowly so, or linear, ± undulate, long-acute to rounded at apex, entire or obscurely crenulate, basally tapered or cuneate, finally contracted to a (sometimes obscure) pseudo-petiole 2–10 mm long, articulate, 20–120(–180) × (2–) 5–25 mm, prominently reticulate, coriaceous, light to dull green. Juvenile phyllodes similar to adults, proportionally broader; intermediate phyllodes much larger, to 200 mm long and 60 mm broad. Unit inflorescences 1–2(–4) per axil, umbelliform or corymbose, 5–20-flowered; peduncle 5–25 (35) mm long; rachis 5–25(–45) mm long. Calyx campanulate, 4.3–6.0 mm long including the 1.4–2.2 mm receptacle to which it is constricted at the base, variably infused and spotted with purple at the apices, sinuses and on the body; upper 2 lobes broadly to shallowly triangular, acute, united a little higher than lower 3, 0.9–1.4 mm long; lower 3 lobes ca. equal, triangular to broadly triangular, acute or acuminate, 0.8–1.3 mm long. Corolla : standard very broadly ovate to depressed-ovate, emarginate, cordate, 6.9–9.0 × 7.7–11.1 mm including the 1.7–2.4 mm claw, rich yellow to orange-yellow with a red-brown infusion surrounding an intense yellow bilobed marking at centre; wings obovate or obovate-oblong, rounded and incurved at the apex, strongly auriculate, 6.5–7.6 × 2.5–3.8 mm including the 2.4 mm claw, red-brown grading to yellow at the apex; keel half depressed-obovate or transversely elliptic, acute to scarcely obtuse, saccate, auriculate, 5.1–6.0 × 2.5–3.0 mm including the 1.9–2.4 mm claw, red, very dark at apex. Stamens strongly dimorphic: inner whorl of 5 with terete filaments and discoid or compressed broadly ovoid, versatile anthers with confluent thecae; outer whorl of 5 with compressed filaments slightly dilated upwards, and compressed, ovoid or broadly ovoid, basifixed, 2-celled anthers; filaments free. Pod obliquely shallowly to very broadly obtriangular, acute or scarcely so, compressed, 8–11 × 5–8 mm, usually red-brown, lustrous, faintly reticulate or nearly smooth; upper suture strongly sigmoid; lower suture acute. Seed compressed ovoid, 2.8–4.4 mm long, 1.8–2.5 mm broad, 1–1.7 mm thick, reddish brown with black mottling; aril obloid, with a fleshy distal lobe, 1.6–2.8 mm long. ( Fig. 43 ).

Chromosome number:— n = 9, 2n = 18 ( Sands 1975).

Common name:— Long-leaved Bitter-pea.

Flowering period:— (August) September to November. Fruiting period: November to December.

Distribution:— Endemic to New South Wales, where it occurs mainly in the Sydney region, including the Blue Mountains. The full range extends from Red Head Bluff, near Newcastle, south to Ulladulla, with an outlier at Green Cape near the Victorian border.

Habitat:— Restricted to sandy or lateritic soil over sandstone, in dry sclerophyll forest or heath.

A MONOGRAPH OF DAVIESIA

Phytotaxa 300 (1) © 2017 Magnolia Press • 105 106 • Phytotaxa 300 (1) © 2017 Magnolia Press

CRISP ET AL.

Selected specimens (174 examined):— NEW SOUTH WALES. Central Coast: Nepean Dam to Bargo Road, 34°17’S, 150°35’E, E. F . Constable, 3 December 1953 ( NSW 26521 ); 0.5 km S of Thirlmere , 34°13’S, 150°34’E, M . D. Crisp 4686–8, 27 November 1978 ( CBG); Waterfall , 34°08’S, 151°00’E, H . Deane, September 1886 ( NSW 35130 ); Mellong Range , S of Putty, 32°58’S, 150°42’E, L. A. S . Johnson s.n., 20 September 1951 ( NSW 17667 ); Grose – Nepean Rivers, 33°36’S, 150°42’E, J. H . Maiden s.n. & R. H . Cambage, September 1906 ( NSW 35117 ). Central Tablelands: Kings Tableland , 33°46’S, 150°23’E, M . D. Crisp 7493, J. M . Taylor & P. H . Weston, 29 October 1984 ( CBG, MEL, NSW); 2 km N of Hill Top , 34°20’S, 150°29’E, M . D. Crisp 7854 & P. H . Weston, 6 November 1986 ( CBG, JRAU, MEL, MEXU, MO); ibid., M . D. Crisp 7855, 6 November 1986 ( CBG, MO, NSW); Valley Heights , 33°42’S, 150°35’E, A. A . Hamilton 2540a, b, January 1914 ( NSW); Blaxland , 33°45’S, 150°37’E, A. A . Hamilton 240c, June 1914 ( NSW); 4.8 km E of Leumeah , 34°03’S, 150°56’E, L. A. S . Johnson s.n., 6 November 1948 ( NSW 35114 ); Berowra , 33°38’S, 151°09’E, E . Lassak s.n., September 1964 ( CBG 9001953 ); Mittagong to Penrith road, M . Parris s.n., 22 November 1979 ( CBG 8503700 ); Hazelbrook , 33°44’S, 150°27’E, M. E . Phillips s.n., October 1945 ( CBG 9001960 , NSW); Blue Mountains, Ingar picnic area, 11 km SE of Wentworth Falls, 33°45’S, 150°25’E, I. R . Telford 2956 & J . Pulley, 29 September 1971 ( CBG). South Coast: Turpentine Range, 35°05’S, 150°23’E, M . D. Crisp 1168, 14 September 1975 ( CBG, HO, NSW); near Green Cape, 37°16’S, 150°03’E, M. E . Phillips 110, 8 October 1961 ( CBG) .

Affinity:— Daviesia corymbosa is closely related to D. latifolia , D. laevis and D. laxiflora but is immediately distinguished by its unit inflorescences, which are corymbose (as opposed to evenly racemose), consisting of a distinct peduncle bearing non-subtending bracts only towards the base, naked above, then terminating in a condensed rachis bearing bracts that subtend flowers ( Fig.43C ). Sometimes the raceme rachis is so condensed that the inflorescence appears umbelliform. Daviesia laxiflora also differs from D. corymbosa in having subulate, appressed bracts, while D. laevis differs in having obscure tertiary venation, and both these species and D. latifolia have more or less glaucous phyllodes by contrast with the green phyllodes of D. corymbosa .

Hybrids:— Daviesia corymbosa × D. latifolia ( Crisp 1991a) .

Figures

FIGURE 43. Daviesia corymbosa. A. Flowering branchlet. B. Linear phyllode. C. Inflorescence. D. Flower, lateral view. E. Calyx opened out, upper lobes at left. F. Standard. G Wings. H. Keel. I. Same, opened out. J. Pod. A, C–I from Crisp 1168; B, J from Crisp 4688. Drawn by A.L. Prowse and D. Fortescue. Adapted from Crisp (1991a) with permission from CSIRO Publishing.