Young plant. Photo Claire Marks.

Crinkled leaf. Photo Claire Marks.

Inflorescence. Photo Claire Marks.

Photo Claire Marks.

Photo Claire Marks.

Young fruit. Photo Claire Marks.

Distribution map generated from Australia's Virtual Herbarium, May 2006.


Nicotiana monoschizocarpa (P.Horton) Symon & Lepschi, J. Adelaide Bot. Gard. 21: 92 (2007); Nicotiana debneyi subsp. monoschizocarpa P. Horton, J. Adelaide Bot. Gard. 3: 12 (1981).

T: Daly River Crossing, Daly River road, N.T., 28 Sept. 1973, J. McKean 1183; holo: NT, iso: CANB, DNA, NSW.


Herb to 1.5 m, leaves and lower stems sparsely pubescent with non-glandular hairs.  

Radical leaves elliptic, the lamina up to 25 cm long and 14 cm wide; petiole to 14 cm long, broadly winged, somewhat stem-clasping and auriculate at base; cauline leaves smaller, the upper ones narrowly elliptic to linear and becoming sessile, the base auriculate and stem-clasping.  

Inflorescence panicle-like, usually many-branched, densely pubescent with glandular hairs. Calyx 4–10 mm long. Corolla-tube 10–25 mm long, narrow at base, to 1.5 mm wide at top of calyx; limb 6–13 mm diam.; lobes narrow (always longer than broad), acute or slightly obtuse, fused less than half way. Staminal filaments to 3.5 mm long, inserted in upper half of corolla-tube; upper 4 anthers at the same level or nearly so.  

Capsule dehiscing by 2 valves, ellipsoid to ovoid, 5–11 mm long. Seeds ovoid to trapezoid; testa honeycombed.  n=24.

Distribution and ecology

Known only from Daly River and Reynolds River region in north-western N.T.

Grows in clay soils of riverbanks.


Differs from Nicotiana debneyi, where it was earlier treated as a subspecies, by its narrower corolla lobes (always longer than wide) and its 2-valved capsule.

Symon DE, Lepschi BJ. 2007 A new status in Nicotiana (Solanaceae): N. monoschizocarpa (P.Horton) Symon & Lepschi. J. Adelaide Bot. Gard. 21: 92.

Selected specimens

N.T.: Daly River, C.R. Dunlop 5028 (AD, DNA); Oolloo Stn, J. Muspratt 92 (CANB, NT).