Grammosolen truncatus (Ising) Haegi, Telopea 2: 178 (1981)
Anthotroche truncata Ising, Trans. & Proc. Roy. Soc. S. Austral. 46: 605; t. 38, fig. 1 (1922).
T: Ooldea, S.A., 15 Sept. 1920, E.H. Ising s.n.; syn: AD, ADW, BM, BRI, MEL, NSW; Barton, S.A., 19 Sept. 1920, E.H. Ising; syn: AD.
Erect shrub to 2 m, greyish. Branches densely tomentose with mainly non-glandular, stellate-dendritic hairs.
Leaves ovate to ovate-elliptic, occasionally elliptic, 5–18 mm long, 3–11 mm wide, entire, densely tomentose; petiole 2–4 mm long.
Inflorescence 1–3–flowered, often in short, leafy clusters; pedicels to 0.6 mm long, glabrous to moderately pubescent. Calyx 2.5–4 mm long, densely tomentose, also with a few glandular hairs. Corolla 7–11 mm long, pubescent outside, papillose inside; tube markedly spreading in upper part; lobes 2.5–6 mm long, 1.5–3 mm wide. Stamens 2–4 mm long.
Capsule globose, 4–4.5 mm diam. Seeds c. 2.8 mm long.
Distribution and ecology
Occurs from western Gawler Ranges, Eyre Peninsula, northwest to the Gairdner-Torrens Basin and Nullarbor region in c. 130°E long., S.A.
Grows in deep sand, usually on sand ridges in mallee associations, often in disturbed sites with Triodia.
Phylogenetic studies by Garcia & Olmstead (2003) on the Tribe Anthocercideae using two chloroplast DNA regions included this species. The studies indicated that Grammosolen is monophyletic.
Reference: V.F.Garcia & R.G.Olmstead (2003). Phylogenetics of Tribe Anthocercideaea (Solanaceae) based on ndhF and trnL/F sequence data. Systematic Botany 28: 609-615.
A discussion of the tropane alkaloids which occur in Grammosolen and other Anthocercideae can be found in Griffith & Lin (2000). Results showed this genus to be most closely related to nicotine-free species of Cyphanthera.
Ref: W.J. Griffin & G.D. Lin (2000). Chemotaxonomy and geographical distribution of tropane
alkaloids. Phytochemistry 53: 627–628.
S.A.: c. 3 km S of Maralinga, N. Forde 620 (AD, CANB); Gawler Ranges, L. Haegi 770 (AD, CBG, NSW); Gawler Ranges, D. Symon 8206 (ADW - now AD).
Images and information on web
A fact sheet for this species can be downloaded from the SA eFlora site.