Daviesia decurrens Meisn. subsp. decurrens

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

95a. Daviesia decurrens Meisn. subsp. decurrens

Daviesia prionodes Meisner (1844: 52) . Daviesia pectinata Lindl. var. prionodes (Meisn.) E.Pritz. in Diels & E. Pritzel (1904: 250). Type : ‘ In limoso-calculosis jugi montium Darlings’ -range (Perth) d. 12. September 1839. Herb. Preiss. No. 1148. et in region. interior. Australiae occidentalis, d. 12. Mart. 1840. No. 1141. (Drummond No. 235.)’. Lectotype (Crisp 1995: 1187): Drummond 235 ( BM, ex Herb. Shuttleworth); isolectotype: G (2 sheets) , K (2 sheets) , MEL, OXF, P (2 sheets), W (2 sheets). Syntype: Preiss 1141 ( LD, NY). Syntype: Preiss 1148 ( LD, NY); isosyntypes: G (2 sheets) , MEL .

Daviesia physodes A.Cunn. ex Don (1832: 125) f. gracilis Meisner (1848: 213) . Type: ‘Swan River, Drummond coll. II. No. 105.’ Holotype: BM (ex Herb. Shuttleworth); isotypes: G (2 sheets), K (3 sheets), LD, MEL, OXF, P, W.

Differs from subsp. hamata in having much longer (to 45 mm), broader (to 12 mm), vertically compressed, strongly decurrent phyllodes and ridged, trigonous branchlets. ( Fig. 95 ).

Distribution:— Western Australia, from Three Springs south to Nannup and King George Sound. A single collection from Coolgardie, much farther inland, is a doubtful record because the locality is stamped on the label rather than written and is well within the range of subsp. hamata .

Habitat:— Grows in laterite-derived sandy, clayey and gravelly soils on flats, mostly in jarrah-marri forest or eucalypt woodland, though occasionally in Banksia woodland or Melaleuca swamp.

Selected specimens (190 examined):— WESTERN AUSTRALIA. Irwin : 18 km NW of Moora, 30°33’S, 115°49’E, C . Chapman (18)78, 30 July 1978 ( CBG, MEL, PERTH); 8 km S of Eneabba , 29°53’S, 115°15’E, E. A . Griffin 888, 10 July 1977 ( PERTH); 25 km S of Rail crossing on Eneabba S Road , 30°01’S, 115°13’E, C . Chapman (62)77, 25 August 1977 ( CBG); Mt Lesueur , NE of Jurien, 30°11’S, 115°12’E, R. E. S . Sokolowski 13, 22 June 1984 ( CANB, PERTH). Darling: 56 km N of Muchea along Brand Highway , 31°07’S, 115°43’E, M . D. Crisp 6458–9, 15 July 1980 ( CBG); Darling Range , 2 km NE of Great Northern Highway, from 22 km N of Bullsbrook, 31°30’S, 116°03’E, M . D. Crisp 6633, 21 July 1980 ( AD, CBG, PERTH); 58 km SE of Kelmscott along Brookton Highway , 32°17’S, 116°33’E, M . D. Crisp 6655–6, 22 July 1980 ( CBG, MEL); Lowden , ca. 33°32’S, 115°58’E, M . Koch 2218, September 1914 ( PERTH 05196043 ); Donnybrook , 33°35’S, 115°49’E, C. E . Woolcock D 69, 25 July 1981 ( CBG); Mundaring Weir Road , south side of reservoir, 32°00’S, 116°10’E, M. G . Corrick 9190 & J. H . Ross, 5 October 1984 ( CANB, HO, MEL); Mundaring Weir , 31°57’S, 116°10’E, C. A . Gardner 539, 10 July 1920 ( PERTH); 41 km NW of North Bannister along Albany Highway , 32°17’S, 116°12’E, J . Taylor 2141 & P . Ollerenshaw, 22 September 1983 ( CBG, MEL); Canning Vale, 20 km SE of Perth, 32°08’S, 116°03’E, D. Mayrhofer 4, 3 August 1984 ( CBG); N of Perth on Geraldton Highway , ca. 31°30’S, 116°00’E, C . Chapman (88 B)77, 27 September 1977 ( CBG); between Darkan and Collie , ca. 33°25’S, 116°30’E, C. E . Woolcock D 29, 22 July 1981 ( CBG); Darlington, Darling Range , 31°55’S, 116°04’E, A . Morrison s.n., 24 June 1899 ( CANB 336571 , PERTH); 20 km N of Boddington, Bannister Hill , 32°38’S, 116°29’E, M . D. Crisp 5390, 22 January 1979, seedling ( CBG). Avon : Between Narrogin and Wagin, C. E . Woolcock D 70, 22 July 1981 ( CBG); sources of the Swan River , E . Merrall s.n., ( MEL 81257 ). Roe: 50 km S of Mayanup towards Cranbrook, G. J . Keighery 29, 10 May 1974 ( PERTH). Coolgardie: Coolgardie , 30°57’S, 121°09’E, L. G . Webster s.n., 1899 ( NSW)—record doubtful (see above) .

Figures

FIGURE 95. Daviesia decurrens subsp. decurrens. A–C. Branchlets showing flowers and variation in vegetative morphology. D. Inflorescence. E. Pod. A from Crisp 6655; B from Crisp 6458; C from Crisp 6459; D. from Crisp 6633; E from Koch 2218a. Drawn by B-J. Osborne.