Daviesia incrassata Sm. subsp. incrassata

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

108a. Daviesia incrassata Sm. subsp. incrassata

Reference: Crisp (1995: 1200).

Acacia dolabriformis H.L. Wendland (1820: 6) . Type: ‘ Nec flores nec fructus vidi, sed tantum unicum specimen in Nova Hollandia lectum ...’ Holotype: GOET.

Daviesia incrassata Sm. var. dorrienii Domin (1923: 34) . Type : ‘W.A: Slab Hut Creek to Cranbrook, A.A. DORRIEN- SMITH.’ Lectotype (Crisp 1995: 1200): K; isolectotype: PR.

Daviesia incrassata Sm. var. typica Domin (1923: 33) . Notes: nom. illeg., replaced by the autonym.

[ Daviesia colletioides auct . non A.Cunn. ex Bentham (1837a: 75): Meisner (1844: 48), partly; Bentham (1864: 83), partly. Specimens cited: ‘In solo turfoso planitiei prope oppidum Albany, d. 5. October 1840. Herb. Preiss. No. 1180 et in region. interior. Australiae meridionali-occid. No. 1163.’ Specimens seen: Preiss 1180: G (2 sheets), MO (partly), NY = D. inflata ; G, LD, MO (partly) = D. incrassata ; Preiss 1163: G, LD, S = D. inflata . Note: For a full discussion of the specimens seen and cited by Meisn. and of the identity of this material, see Crisp (1984).]

Phyllodes and branchlets trigonous, rarely becoming terete; branchlets gently flexuose; phyllodes diverging at 45– 60(–80)°, vertically compressed or dilated, at least towards the base of the plant, mostly 5–15 mm long in the adult plant. Juvenile phyllodes vertically dilated and asymmetrically lobed, up to 5 cm long. ( Fig. 109 ).

Flowering period:— July to October. Fruiting period: October to January.

Distribution:— Western Australia, as for the species.

Habitat:— Grows in a variety of substrates, e.g. in sand, laterite or seasonally swampy ground, in eucalypt forest, woodland or heath, Allocasuarina woodland or Banksia heath.

Selected specimens (150 examined):—WESTERN AUSTRALIA. Irwin : Wilcocks Road (off Green Head Road), 30°15’S, 115°30’E , C. Chapman (16)78 and (16b)78, 30 July 1978 ( CBG, PERTH). Avon : Nature reserve no. 16479, 20 km W of Kulin, cnr Fence and 86 Gate Roads, 32°37’S, 117°57’E , J. M. Brown 027, 12 October 1984 ( CANB, PERTH). Darling : 16 km N of Kojonup on Albany Highway, 33°42’S, 117°07’E , J. S. Beard 8196, 26 October 1977 ( PERTH) ; N of first rail crossing N of Mogumber , 30°45’S, 116°03’E , C. Chapman (41)77, 17 August 1977 ( CBG, MEL); 1 km W of Brand Highway on Mimegarra road, 30°42’S, 115°34’E , R. J. Hnatiuk 760020, 3 August 1976 ( PERTH); 27 km N of Collie, near the Harris River , 33°09’S, 116°09’E , M. D. Crisp 1035, 12 August 1975, juvenile ( CBG); 5 km from Collie along road to Mumballup, 33°23’S, 116°10’E , M. D. Crisp 5368, 21 January 1979 ( CBG); Albany Highway , 21 km S of Mt Barker, 34°48’S, 117°44’E , M. D. Crisp 1021, 11 August 1975 ( CBG). Roe : Near Commander Rocks, ca. 20 km SSW of Lake King township, 33°14’S, 119°34’E , P. G. Wilson 6983, 10 August 1968 ( CANB, PERTH); 14 km E of Lake King , 33°05’S, 119°50’E , D. Young 132, 15 June 1967 ( PERTH); 50 km W of Lake Grace , 33°11’S, 117°57’E , C. E. Woolcock D 104, 27 July 1981 ( CBG); Lake King , 33°05’S, 119°41’E , C. E. Woolcock D 40, 28 July 1981 ( CBG). Eyre : Ca. 60 km NE of Albany, 2.5 km NE of South Stirling, 34°34’S, 118°14’E , M. D. Crisp 6132 et al., 25 September 1979 ( CBG, MEL, US); 80 km from Israelite Bay along road to Esperance, 2 km SE of Boyatup Hill, 33°45’S, 123°02’E , M. D. Crisp 4915, 7 January 1979 ( CBG); Boxwood Hills to Toompup road, 12 km NW of Chillilup Pool turn-off, 34°16’S, 118°30’E , M.D. Crisp 6138 et al., 22 September 1979 ( BM, CBG, NSW, PERTH); 3 km N of Duke of Orleans Bay , 33°52’S, 122°38’E , P. G. Wilson 8111, 28 September 1968 ( CANB, PERTH) .

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CRISP ET AL.

A MONOGRAPH OF DAVIESIA

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Affinity:— Subsp. teres differs in having terete branchlets and phyllodes at all stages of development. Subsp. reversifolia differs in the markedly flexuose, divaricating branchlets, and in the patent or reflexed phyllodes. This subspecies interrupts the geographic continuity of subsp. incrassata along part of the south coast of WA, between Bremer Bay and Esperance. Subspecies incrassata is highly variable in the coarseness of the vegetative parts and the angularity of the stems.

Figures

FIGURE 109. Daviesia incrassata subsp. incrassata. A. Flowering branchlet with terete upper phyllodes. B. Lower phyllode from the same plant, showing vertical dilation. C. Flowering branchlet with vertically compressed phyllodes. D. Lower phyllode from the same plant, showing pronounced vertical dilation. E. Inflorescence. F. Pod. A, B from Crisp 6132; C, D from Chapman (16)78; E from Crisp 1021; F from Crisp 5368. Drawn by A.L. Prowse. Adapted from Crisp (1995) with permission from CSIRO Publishing.