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