Nicotiana glauca
Nicotiana acuminata
tree tobacco
many-flower tobacco, manyflower
usually branched near base, occasionally with distinct trunk (branches drooping), 10–60(–100) dm, glabrous, somewhat glaucous.
branched from base (proximal branches longer), 5–20 dm, viscid-pubescent.
petiole length 1/2 blade (not winged);
blade ovate to lanceolate, 5–25 cm, base acute or cordate, apex rounded, (rubbery), surfaces glabrous, glaucous.
petiole length 1/3–1/6 blade;
blade elliptic to lanceolate, becoming very narrow near inflorescence, 10–25 cm, apex acuminate, surfaces viscid-pubescent, somewhat scabrous adaxially.
branched, not leafy; flowering diurnal.
few-branched, somewhat leafy; flowering crepuscular.
0.3–1 cm.
0.5–2 cm.
calyx green, (evenly cylindric), 1–1.5 cm, without membranous sinuses, glabrous or minutely pubescent, lobes sharply triangular, equal, much shorter than tube;
corolla straight, 2.5–4.5 cm (excluding limb), glabrous or finely pubescent externally, tube bright yellow to greenish yellow, (cylindric to clavate, slightly constricted apically), 0.5–0.8 cm × 3 mm, widening slightly to throat 1.5–4 cm × 6–8 mm, glabrous within, limb assurgent, greenish yellow or bright green (usually distinct color from tube in young flowers), turning yellow and same color as tube with age, circular or pentagonal, 0.6–0.8 cm diam., lobes rounded, broadly triangular, equal;
stamens inserted at base of throat, extending to corolla mouth;
filaments subequal 2.5–4.5 cm, (geniculate at base), glabrous;
style straight, exceeding stamens and exserted from corolla mouth.
calyx strongly purple-veined, 1–2 cm, membranous, viscid-pubescent (hairs without swollen bases), lobes long-triangular, unequal, longest equaling tube;
corolla straight, 2.5–10 cm (excluding limb), viscid-puberulent externally, tube white or white tinged with greenish purple, sometimes striped, 0.8–4 cm × 2–3 mm, widening to throat 1–4 × 5 mm, glabrous or minutely puberulent internally, limb spreading, white, circular, 2–4 cm diam., lobes shallow, deltate or emarginate;
stamens inserted near base of throat, included;
filaments unequal, in 2 equal or unequal pairs, 4 cm, 1 filament shorter than either pair, pubescent proximally;
style straight, just surpassing longest stamen pair.
not tearing along sinuses, covering mature capsule.
tearing along membranous sinuses, covering ca. 1/2 of mature capsule.
ovoid, 0.7–1.5 cm.
broadly ovoid, 1–1.2 cm.
0.5 mm.
0.9–1 mm.
trees or shrubs.
leaves: petiole length equaling blade;
blade ovate or orbiculate, 6–12 cm, surfaces viscid-pubescent, somewhat scabrous adaxially.
= 24.
= 24.
Nicotiana glauca
Nicotiana acuminata
Nicotiana glauca is registered as an invasive plant in the United States (www.invasives.org). It can form monodominant stands due to high seed set and germination success. It was originally introduced from Argentina to Mexico, thence to the United States and worldwide (T. H. Goodspeed 1954). Siphaulax glabra Rafinesque is an illegitimate, superfluous name for this species.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Nicotiana acuminata is native to Chile and is naturalized on the West Coast from Baja California to Washington. It is easy to confuse with the native N. attenuata but differs in its much longer corolla tube and usually emarginate limb. The flowers are often clustered near the tips of the few inflorescence branches. Plants from the western United States are often identified as var. multiflora.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
WildflowerSearch
iNaturalist
USDA Plants Database
OR
WA
Flora NW
PNW Herbaria
