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Habit (amongst rocks, Wubin, WA). Image reproduced with permission from Japan Tobacco Inc. from The genus Nicotiana illustrated (1994).

Line drawing by P. Horton showing basal leaf and inflorescence.

Inflorescence (Mt magnet, WA). Image reproduced with permission from Japan Tobacco Inc. from The genus Nicotiana illustrated (1994).

Pot grown plant. Image reproduced with permission from Japan Tobacco Inc. from The genus Nicotiana illustrated (1994).

Image reproduced with permission from Japan Tobacco Inc. from The genus Nicotiana illustrated (1994).

Image reproduced with permission from Japan Tobacco Inc. from The genus Nicotiana illustrated (1994).

Seed of subsp. rosulata (DE Symon 1175, AD). Photo Bob Baldock.

Subsp. rosulata is represented by dots across central western and southern W.A., extending to S.A.

Synonymy

Nicotiana rosulata (S. Moore) Domin, Biblioth. Bot. 89: 592; t. 36, fig. 11 (1929) subsp. rosulata 

N. suaveolens var. rosulata S. Moore, J. Linn. Soc. Bot. 34: 206 (1899). 

T: Near Wilson's Pool, W.A. Goldfields, Apr. 1895, S. Moore s.n.; lecto: BM n.v., photo ADW; iso: K n.v., photo ADW; fide P.Horton, J. Adelaide Bot. Gard. 3: 30 (1981). 

N. stenocarpa H. Wheeler, Univ. Calif. Publ. Bot. 18(4): 61 (1935), fide N.T. Burbidge, Austral. J. Bot. 8: 375 (1960) 

T: Laverton, W.A., Nov. 1909, J.H. Maiden s.n.; holo: NSW.

Description

Herb to 1 m; leaves and lower parts of stem usually sparsely pubescent with non-glandular hairs, upper stem glabrous.  

Leaves usually all radical, elliptic, petiolate; lamina up to 21 cm long; petiole to 8 cm long, narrowly winged.  

Inflorescence panicle-like, few-branched, variably pubescent with glandular hairs. Calyx 6–22 mm long. Corolla-tube 17–37 mm long, 1–2 mm wide at top of calyx; limb 7–25 mm diam., the lobes notched. Upper 4 anthers at the same level or 2 slightly above the other 2, the filaments to 3.5 mm long; filament of the 5th stamen 5–18 mm long, inserted in upper half of corolla-tube. Cleistogamous flowers occasionally present.  

Capsule ellipsoid to narrowly ellipsoid, 6–16 mm long. Seeds usually reniform or acutely angled; testa irregularly honeycombed or wrinkled. n=20.

Distribution and ecology

Widespread across central W.A., extending to north-western S.A. Grows mostly in sandy soils, often under trees along minor water courses.

Notes

A variable species, the corolla-tube becoming progressively shorter from north-eastern to south-western part of the range.  While two subspecies are distinguished, intermediates occur where their distributions overlap.

Distinct from subsp. ingulba by the lack of cauline leaves, the non-glandular pubescence on the lower stems and leaves and by the corolla-tube usually less than 35 mm long.

 According to Pandey (1969) N. rosulata has flowers which are self-compatible. Which particular subspecies was involved in these observations is unknown.

Reference: Pandey, K. K. (1969) Elements of the S-gene complex V. Interspecific cross-compatibility relationships and theory of the evolution of the S complex. Genetica 40, 447-474.

 

A valuable summary of the cultural use of Nicotiana species in Australia is provided in D.E.Symon (2005). Native tobaccos (Solanaceae: Nicotiana spp.) in Australia and their use by Aboriginal peoples. The Beagle 21: 1-10.

Selected specimens

W.A.: 5 km N of Agnew, T.E.H. Aplin 2364 (PERTH). S.A.: 25 km SW of Everard Park Homestead, D.J.E. Whibley 1117 (AD, MEL).

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Web links

A fact sheet for this species can be downloaded from the SA eFlora site and from the FloraBase site as the species.