Nicotiana attenuata |
Solanaceae |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
coyote tobacco, wild tobacco |
nightshade family |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Habit | Herbs, annual, robust, from basal rosette. | Herbs, annual or perennial, vines, shrubs, or trees, sometimes rhizomatous or tuberous, usually hermaphroditic, sometimes gynodioecious or dioecious in Lycium [andromonoecious or dioecious in some Solanum]. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Stems | single or with few weak lateral branches, 5–20 dm, viscid-pubescent or glabrate with few hairs with swollen bases. |
erect or decumbent to prostrate, sympodially branched, glabrous or pubescent, hairs simple, dendritic, or stellate, stalked-vescicular in Quincula, sometimes peltate scales in Solanum, glandular or eglandular, glands sessile or stalked and sometimes multicellular, sometimes prickly or spiny. |
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Leaves | alternate and spiral or unequally paired, simple or pinnately compound [trifoliolate], estipulate, petiolate or sessile; blade margins entire, dentate, lobed, or divided. |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Cauline leaves | petiole length to 1/2 blade, distal leaves sessile; blade lanceolate to linear, progressively narrower distally, 2–8(–10.5) cm, apex acute to acuminate, surfaces viscid-pubescent or glabrate. |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Inflorescences | unbranched or with few short lateral branches, somewhat leafy; flowering crepuscular (early morning). |
terminal, axillary, extra-axillary, in forks of dichotomous branches in some Datura and Solanum, racemose, paniculate, umbellate, or glomerulate cymes, in fascicles of 2–6, or solitary flowers. |
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Pedicels | 0.2–0.4 cm. |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Flowers | calyx uniformly green or with weakly developed veins, 0.6–1 cm, densely viscid-pubescent (hairs with swollen bases), lobes narrowly triangular, shorter than tube, unequal; corolla straight, 2–3.5 cm (excluding limb), viscid-puberulent externally, tube creamy white or tinged with purple-green or gray-green, 0.5–0.7 cm × 1.5–2 mm, widening to throat 2–3 × 5 mm (asymmetrically dilated distally), glabrous or minutely puberulent within, limb spreading or slightly reflexed, white or cream, pentagonal to ± circular and often asymmetrically spreading, 0.4–0.8 cm diam., lobes shallow and rounded or obtuse, broadly triangular (proximal lobes reflexed); stamens inserted near base of throat, included; filaments unequal, 4 of 3 cm (2 of these slightly longer), 1 shorter, 1.5–2 cm, glabrous or minutely pubescent proximally; style straight, just shorter than longest stamen pair. |
bisexual or rarely unisexual, radially symmetric or, less frequently, bilateral; perianth and androecium hypogynous; sepals (4 or)5, connate for almost full length to only at base, tubular, campanulate, obconic, or cyathiform [urceolate], with 3–10 equal or unequal lobes, lobules, or teeth, 5–10 veins extending into appendages that protrude below a truncate rim in Lycianthes, bases of lobes sagittate to cordate in Nicandra; calyx usually persistent in fruit and often accrescent, circumscissile and leaving a basal remnant that is slightly enlarged in some species of Datura, sometimes spreading, reflexed, or expanded to partially or completely enclose fruit, sometimes becoming membranous, sometimes inflated and bladderlike; petals (4 or)5, connate for almost full length to only at base, stellate, campanulate, campanulate-rotate, rotate, funnelform, salverform, or urceolate [crateriform, cylindric], margins nearly entire or shallowly to deeply 4–10-lobed, lobes sometimes widely flaring or reflexed, corona present between tube and limb in Nectouxia; stamens (2 or 4 plus staminodes or)5, variously adnate to corolla from near base nearly to rim, with appendage at point of fusion in Cestrum, equal or unequal in length, anthers sometimes connivent, basi-, dorsi-, or ventrifixed, with unequal thecae in Bouchetia, Browallia, and Hunzikeria, connective sometimes thickened, with 2 dorsal wings in Nectouxia, dehiscence longitudinal or poricidal; pistil 1, 2–5-carpellate; ovary superior, nectary disc sometimes present at base, [1 or]2–5[or 10]-locular, [1 or]2–many ovules per locule, placentation axile; style 1, stigma rounded-truncate, capitate, or 2–5-lobed. |
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Fruiting calyces | not tearing at sinuses, covering to 1/2 of mature capsule. |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Fruits | usually berries or 2–4-valved capsules, dehiscence septicidal, circumscissile, or irregular [septifragal, septicidal-loculicidal], sometimes drupaceous in Lycium [schizocarp of nutlets in Nolana]. |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Capsules | ovoid, 0.8–1.2 cm. |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Seeds | 0.8 mm. |
1–many, whitish to straw-colored to dark brown or black, often flattened and discoidal or reniform, sometimes globose, ovoid, prismatic, or angulate, with hyaline margin in Oryctes, with white caruncle in some species of Datura, intermixed with sclerotic granules in Calliphysalis and some Solanum; embryo straight or curved, endosperm usually abundant. |
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Rosette | leaves: petiole length shorter than or almost equaling blade (2–3 cm); blade elliptic or oblong-elliptic, 5–10 cm, surfaces viscid-pubescent. |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
2n | = 24. |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Nicotiana attenuata |
Solanaceae |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Phenology | Flowering May–Nov. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Habitat | Sandy slopes, banks and rocky outcrops, disturbed places, often appearing after fire. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Elevation | (50–)1000–2600 m. ((200–)3300–8500 ft.) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Distribution |
AZ; CA; CO; ID; MT; NM; NV; OR; TX; UT; WA; WY; BC; Mexico (Baja California, Sinaloa, Sonora)
|
nearly worldwide |
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Discussion | Nicotiana attenuata is the most common species of the genus in the Great Basin, and often forms large colonies after fires and other disturbance. It has been the subject of intensive study over many years by the Max Planck Institute for Chemical Ecology at the Lytle Ranch Preserve in southwestern Utah (for example, C. Diezel et al. 2011; D. Kessler et al. 2015). There are some records of its use by Native American peoples as a smoking or chewing tobacco; it has also been reported as a medicinal plant used by the Zuni people (M. C. Stevenson 1915). Nicotiana torreyana A. Nelson & J. F. Macbride is an illegitimate name that has been applied to this species. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Genera ca. 97, species ca. 2500 (27 genera, 151 species, including 2 hybrids, in the flora). Solanaceae occur on all continents except Antarctica, but their greatest diversity is in the Neotropics. Their closest relative is the Convolvulaceae, from which they can be distinguished by growth form (when herbaceous vines, not with twining stems), the usually 2-locular ovary with numerous ovules, and the absence of laticifers with milky sap. Members of the Solanaceae exhibit a sympodial growth pattern, resulting in unusual placement of leaves, branches, and flowers (A. Child 1979). The foliage of some Solanaceae is fetid or pungent (reminiscent of rotting potatoes or with a sharp, tomato-like smell). The vegetative portions of most members of the family are poisonous due to the presence of tropane and steroidal alkaloids. Despite the toxicity of its foliage, many Solanaceae species are of worldwide economic importance, such as tomato (Solanum lycopersicum), eggplant (S. melongena), potato (S. tuberosum), chili and bell peppers (Capsicum spp.), tobacco (Nicotiana tabacum), and Petunia. The family also includes many species of small-scale crop, medicinal, or horticultural importance. The most well known of these in the flora area are tomatillo (Physalis philadelphica), belladonna (Atropa belladonna), goji berry (Lycium barbarum and L. chinense), Chinese lantern plant (Alkekengi officinarum), jimsonweed (Datura spp.), jessamine (Cestrum spp.), and Calibrachoa. The fruit in the Solanaceae is typically a berry or capsule (with circumscissile dehiscence in Hyoscyamus), but may be hardened and drupaceous in some Lycium. The berry-fruited taxa may have a thick, juicy pericarp, or one that is dry and thin, ultimately shattering into irregular pieces. Many genera have an accrescent calyx. The most enlarged of these may become rigid and spinescent (Hyoscyamus), inflated and almost closed around the berry (Alkekengi, Calliphysalis, Physalis, Quincula), loose and enveloping all (Nicandra) or at least the basal half of the berry (Chamaesaracha), or reflexed or flaring (Jaltomata). The brightly colored, juicy berries of many species are animal dispersed. The inflated, bladderlike calyces in several genera also aid in dispersal (short distance by water or ground level by wind). The showy flowers of Solanaceae are pollinated by bees, flies, butterflies, moths, or hummingbirds foraging for nectar and/or pollen. Solanum does not produce nectar, and pollen is gathered by vibration (buzz pollination) or manipulation of the anthers. Flowers of Cestrum, Datura, and some Nicotiana emit a strong, sweet fragrance in the evening and are moth-pollinated. Some Solanaceae grown as ornamentals have escaped and persisted for short periods but have not become established in the flora. Nierembergia hippomanica Miers var. coerulea R. Millan has been collected from disturbed sites in Texas (1958, 1962, 1998), and N. scoparia Sendtner was found along a roadside in Georgia in 1947. Nierembergia Ruiz & Pavon is a South American genus. Brugmansia suaveolens (Humboldt & Bonpland ex Willdenow) Sweet, also native to South America, was found in a ruderal yard (2001) and wooded ravine (1983) in Florida. Brugmansia has been treated as part of Datura, but it can be distinguished from that genus by its woody habit, pendulous flowers, and elongated, spineless fruits. Since the early 1990s, our understanding of the circumscription of the Solanaceae, as well as phylogenetic relationships within the family, have been clarified using both morphological and molecular characters, particularly chloroplast DNA sequence data (W. G. D’Arcy 1991; A. T. Hunziker 2001; T. R. Martins and T. J. Barkman 2005; R. G. Olmstead and L. Bohs 2007; Olmstead and J. D. Palmer 1991, 1992; Olmstead et al. 1999, 2008; T. Särkinen et al. 2013). Based on molecular data, the family is considered monophyletic with the inclusion of Nolana Linnaeus f., Schizanthus, and Sclerophylax Miers. The subfamilies Solanoideae Burnett and Cestroideae Burnett, traditionally recognized on the basis of morphology alone, have been shown to be nonmonophyletic. Some generic concepts have been revised; changes relevant to the flora area are discussed under the various genera. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Key |
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Source | FNA vol. 14. | FNA vol. 14. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Parent taxa | Solanaceae > Nicotiana | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Sibling taxa | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Subordinate taxa | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Name authority | Torrey ex S. Watson: Botany (Fortieth Parallel), 276, plate 27, figs. 1, 2. (1871) | Jussieu | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Web links |
|
|