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Flora of Australia Online

Dichopogon strictus (R.Br.) Baker, J. Linn. Soc., Bot. 15: 319 (1876)

Arthropodium strictum R.Br., Prodr. 276 (1810). T: Port Dalrymple, [Tas.], R.Brown Iter Australiense 5707 ; lecto: BM, fide N.H.Brittan, Fl. Australia 45: 486 (1987); syn: K (with additional A.Cunningham specimen).

[Dichopogon humilis auct. non Kunth: J.G.Baker, J. Linn. Soc., Bot. 15: 319 (1876)] 

[Arthropodium laxum auct. non Schult. & Schult.f.: J.D.Hooker, Fl. Tasman. 2: t. 131 (1860)] 

Illustrations: J.D.Hooker, Fl. Tasman. 2: t. 131 (1860), as Arthropodium laxum ; Bot. Mag. 110: t. 6746 (1884).

Tubers c. 15 mm long, c. 9 mm wide, 3–5 cm from rootstock. Leaves 2–12, 9–65 cm long, 1–10 mm wide, surrounded by leaf fibres. Inflorescence racemose, 25–100 cm long; sterile bracts absent or lanceolate, 5.5–14 mm long. Flowers 1 per node; pedicels 13–37 mm long, erect, articulated to 2 mm from flower; bracts usually 6–15 mm long. Perianth segments 6–14 mm long. Sepals broadly linear, 2–4 mm wide. Petals elliptic, 4–8 mm wide. Anthers 3–4.5 mm long, usually purple; appendages 2, 0.5–1.5 mm long, usually yellow; filaments 1.7–3 mm long, straight. Ovary 1–1.5 mm diam.; style 3.5–6 mm long. Capsule ±spherical, 4–7 mm diam., initially enclosed by perianth. Seeds tetrahedral, c. 2 mm diam. Fig. 106J–M.

Occurs in south-eastern S.A., south-central Vic., Great Dividing Ra. and isolated western localities in N.S.W., and central Tas. Grows on rocky hillsides, in open woodland, banksia scrub, sandy heathland, limestone, sandstone and on red sand dunes. Flowers Aug.–Jan. Map 395.

S.A.: c. 10 km NW of Adelaide, T.J.Smith 1437 (AD). N.S.W.: c. 3 km E of Howell, A.N.Rodd 2575 (NSW). Vic.: near Killawarra, c. 16 km NW of Wangaratta, T.B.Muir 1715 (K, MEL). Tas.: near 'Elsdon', Midlands Hwy, A.M.Buchanan 610 (HO).

Several collections from eastern and northern Vic. resemble Dichopogon strictus but have 2 or 3 pedicels per node rather than the typical solitary flower. Further study is required to determine whether these variants merit taxonomic recognition.

Since publication of the Flora of Australia the Australian Plant Census treats this taxon as Arthropodium strictum (here referred to as a synonym).

(N.H.Brittan)

 

Data derived from Flora of Australia Volume 45 (1987), a product of ABRS, ©Commonwealth of Australia