Nicotiana L.

First published in Sp. Pl.: 180 (1753)
This genus is accepted
The native range of this genus is W. Canada to Guatemala, Cuba, Ecuador to S. South America and E. & S. Brazil, Namibia, Australia to S. Pacific.

Descriptions

Flora Zambesiaca. Vol. 8, Part 4. Solanaceae. Gonçalves AE. 2005

Morphology General Habit
Herbs or shrubs to small trees, with varied indumentum, often viscid-glandular, rarely glabrous Herbs or shrubs to small trees, with varied indumentum, often viscid-glandular, rarely glabrous.
Morphology Leaves
Leaves solitary, alternate, the lower ones sometimes in a sparse rosette, petiolate or sessile, entire to sinuate, strongly aromatic; minor leaves often present as auricles or cauline stipule-like processes Leaves solitary, alternate, the lower ones sometimes in a sparse rosette, petiolate or sessile, entire to sinuate, strongly aromatic; minor leaves often present as auricles or cauline stipule-like processes.
Morphology Reproductive morphology Inflorescences
Cymes few–many-flowered, terminal, paniculiform with distinct central axis, sometimes unilateral, pseudoracemiform, bracteate or ebracteate, rarely reduced to one flower; pedicels bracteolate or not, articulated at the base or not Cymes few–many-flowered, terminal, paniculiform with distinct central axis, sometimes unilateral, pseudoracemiform, bracteate or ebracteate, rarely reduced to one flower; pedicels bracteolate or not, articulated at the base or not.
Morphology Reproductive morphology Flowers
Flowers actinomorphic or somewhat zygomorphic, fragrant or scentless at dusk Flowers actinomorphic or somewhat zygomorphic, fragrant or scentless at dusk.
Morphology Reproductive morphology Flowers Calyx
Calyx commonly much shorter than the corolla tube, ovoid to tubular, sometimes campanulate or cupular, 5-lobed, the lobes shorter than the tube, with valvate aestivation; in fruit usually somewhat enlarged, enclosing it or not Calyx commonly much shorter than the corolla tube, ovoid to tubular, sometimes campanulate or cupular, 5-lobed, the lobes shorter than the tube, with valvate aestivation; in fruit usually somewhat enlarged, enclosing it or not.
Morphology Reproductive morphology Flowers Corolla
Corolla white or variously coloured, greenish, yellow, pink, red or purplish, tubular, infundibuliform or salviform, sometimes campanulate; tubular part often flared into a wider throat; limb shorter than the tube, plicate, erect, spreading or recurving, 5-cleft to ± entire, the lobes with contorted-plicate or rarely imbricate aestivation Corolla white or variously coloured, greenish, yellow, pink, red or purplish, tubular, infundibuliform or salviform, sometimes campanulate; tubular part often flared into a wider throat; limb shorter than the tube, plicate, erect, spreading or recurving, 5-cleft to ± entire, the lobes with contorted-plicate or rarely imbricate aestivation.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 5, ± equal or unequal, sometimes one shorter than the other 4, variously inserted at the same or sometimes different heights in the corolla tube, commonly in the basal half, included or elsewhere sometimes exserted; filaments subulate, often from a flat expanded base, often pubescent, sometimes geniculate where adhering to the corolla; anthers attached on the lower part of the back or at the base between the thecae, very shortly ovate to elliptic in outline, the thecae separated from each other by one third to even half their length, dehiscing by longitudinal slits Stamens 5, ± equal or unequal, sometimes one shorter than the other 4, variously inserted at the same or sometimes different heights in the corolla tube, commonly in the basal half, included or elsewhere sometimes exserted; filaments subulate, often from a flat expanded base, often pubescent, sometimes geniculate where adhering to the corolla; anthers attached on the lower part of the back or at the base between the thecae, very shortly ovate to elliptic in outline, the thecae separated from each other by one third to even half their length, dehiscing by longitudinal slits.
Morphology Reproductive morphology Flowers Disc
Disk thick, annular, deeply lobed to almost truncate, adnate or joined to the basal part of the ovary, to thin and ± inconspicuous Disk thick, annular, deeply lobed to almost truncate, adnate or joined to the basal part of the ovary, to thin and ± inconspicuous.
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary sessile, ovoid or ± conical, 2(or rarely 4 to many)-locular; ovules numerous in each locule on somewhat proliferated placentas, adnate to the dorsal line of the dissepiment(s), anatropous.
Morphology Reproductive morphology Flowers Gynoecium Style
Style slender.
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma minute to dilated, capitate, saucer-shaped, slightly grooved or obscurely 2-lobed at the tip, included or sometimes exserted but rarely so in the Flora Zambesiaca area
Distribution
A genus of about 67 species widely distributed in warm temperate regions of both hemispheres, mostly centred in America, mainly in Andean South America and Mexico, with several species in Australia and South Pacific Islands, and one (Nicotiana africana Me
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary sessile, ovoid or ± conical, 2(or rarely 4 to many)-locular; ovules numerous in each locule on somewhat proliferated placentas, adnate to the dorsal line of the dissepiment(s), anatropous; style slender; stigma minute to dilated, capitate, saucer-shaped, slightly grooved or obscurely 2-lobed at the tip, included or sometimes exserted but rarely so in the Flora Zambesiaca area.
Morphology Reproductive morphology Fruits
Fruit capsular, membranous to slightly woody, 2(or rarely 4)-locular, retaining the loose placentas, apically dehiscent by 2 rather long, septicidal slits, the 2 dry valves often 2-fid (or sometimes the capsule 4–many-valved). Fruit capsular, membranous to slightly woody, 2(or rarely 4)-locular, retaining the loose placentas, apically dehiscent by 2 rather long, septicidal slits, the 2 dry valves often 2-fid (or sometimes the capsule 4–many-valved)
Morphology Reproductive morphology Seeds
Seeds numerous, small or minute, scarcely compressed, globose to ellipsoid, sometimes oblong, ± prismatic or subreniform; testa somewhat leathery, honeycombed- or fluted-reticulate, sometimes obscurely wrinkled-reticulate or -pitted; embryo subterete, ± straight or slightly curved (or elsewhere rarely arcuate) in the axis of the endosperm; cotyledons short, usually one-third to one-quarter the embryo, semi-terete or subclavate. Seeds numerous, small or minute, scarcely compressed, globose to ellipsoid, sometimes oblong, ± prismatic or subreniform; testa somewhat leathery, honeycombed- or fluted-reticulate, sometimes obscurely wrinkled-reticulate or -pitted; embryo subterete, ± straight or slightly curved (or elsewhere rarely arcuate) in the axis of the endosperm; cotyledons short, usually one-third to one-quarter the embryo, semi-terete or subclavate
[FZ]

Solanaceae, Jennifer M Edmonds. Oliganthes, Melongena & Monodolichopus, Maria S. Vorontsova & Sandra Knapp. Flora of Tropical East Africa. 2012

Morphology General Habit
Annual to perennial herbs, rarely shrubs or trees
Morphology Leaves
Leaves simple, solitary or alternate, exstipulate, with petioles often winged
Morphology Reproductive morphology Inflorescences
Inflorescences terminal manyflowered bracteate panicles or racemes, rarely solitary-flowered; flowers actinomorphic or zygomorphic, often opening at night, some nocturnally fragrant, pedicellate; pedicels erect to recurved. Calyx tubular, campanulate or ovoid, shorter than the corolla, with five equal or unequal lobes, persistent and usually enlarged in fruit
Morphology Reproductive morphology Flowers Corolla
Corolla tubular, tube cylindrical below, ampliate and becoming infundibuliform, salverform, hypocrateriform or urceolate above, with short, induplicate lobes, usually spreading after anthesis
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 5, equal or subequal (when either in two groups where 4 are equal with one one shorter or more rarely longer, or in a 2+2+1 grouping), included or exserted; filaments joined below middle of corolla tube but at varying levels when the stamens are unequal, cylindrical or enlarged and geniculate at point of fusion, glabrous to pilose; anthers ovoid, obovoid, elliptic or globose, sides sometimes parallel, medifixed, visible in throat of corolla
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary usually sessile, glabrous, 2-locular, rarely 4-locular, ovules numerous; disc prominent, annular or cupulate; style filiform, glabrous, often exserted; stigma capitate, bilobed, visible in corolla throat
Morphology Reproductive morphology Fruits
Fruit septicidal and loculicidal capsules, dehiscing by two smooth, glabrous valves which split into two
Morphology Reproductive morphology Seeds
Seeds minute, alveolate-reticulate, angular, elliptic, ovoid, globose or discoid, numerous (up to 400/capsule)
[FTEA]

Sources

  • Art and Illustrations in Digifolia

    • Digital Image © Board of Trustees, RBG Kew
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    • ColPlantA 2021. Published on the Internet at http://colplanta.org
    • http://creativecommons.org/licenses/by/3.0/
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    • Flora Zambesiaca
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Flora of Tropical East Africa

    • Flora of Tropical East Africa
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Herbarium Catalogue Specimens

    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/
  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2022. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2022. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Neotropikey

    • Milliken, W., Klitgard, B. and Baracat, A. (2009 onwards), Neotropikey - Interactive key and information resources for flowering plants of the Neotropics.
    • http://creativecommons.org/licenses/by/3.0