Antirrhinum

Linnaeus

Sp. Pl. 2: 612. 1753.

Common names: Snapdragon
Introduced
Etymology: Greek anti, like or resembling, and rhinos, nose, alluding to shape of corolla
Treatment appears in FNA Volume 17. Treatment on page 16. Mentioned on page 5, 12, 13, 22, 42, 44.

Herbs [shrubs], perennial or annual. Stems erect, filiform, twining branches absent, glabrous or hairy. Leaves cauline, opposite proximally, alternate distally; petiole absent [present]; blade not fleshy, not leathery, margins entire. Inflorescences terminal [axillary], racemes [flowers solitary]; bracts present. Pedicels present; bracteoles absent [present]. Flowers bisexual; sepals 5, basally connate, calyx slightly bilaterally symmetric, cupulate, lobes ovate to lanceolate; corolla mauve, purple, red, yellow, or white, bilaterally symmetric, bilabiate and personate, tubular [funnelform], 25–45 mm, tube base gibbous abaxially, not spurred, lobes 5, abaxial 3, adaxial 2; stamens 4, basally adnate to corolla, didynamous, filaments glabrous, pollen-sacs 2 per filament; staminode 0 or 1, minute; ovary 2-locular, placentation axile; stigma capitate. Fruits capsules, 10–15 mm, locules unequal, dehiscence poricidal. Seeds 20–100, light-brown to brown, ovoid, reticulate, wings absent. x = 8.

Distribution

Introduced; Europe (Mediterranean region), also in temperate regions nearly worldwide

Discussion

Species 19 (1 in the flora).

Antirrhinum is sometimes treated as a larger genus including both the species of Mediterranean Europe and the species of western North America (D. M. Thompson 1988). Here, the North American species are treated in five genera, Howelliella, Mohavea, Neogaerrhinum, Pseudorontium, and Sairocarpus, believed to be more closely related to one another than to the European species (D. A. Sutton 1988). There is not yet enough evidence to resolve these relationships; DNA sequence data seem to indicate that the European and North American species are sister groups and that there are at least two groups of closely related species among the American taxa (R. K. Oyama and D. A. Baum 2004; M. Fernández-Mazuecos et al. 2013).

Antirrhinum is distinguished from the segregate genera by the radially symmetric seeds, terminal (versus oblique) styles, and flowers more than 2 cm.

Lower Taxa

... more about "Antirrhinum"
Kerry A. Barringer +  and Neil A. Harriman† +
Linnaeus +
alternate +, opposite +, whorled +, helical +  and subopposite +
? (?) +  and ? (?) +
hairy +  and glabrous +
cupulate +
Snapdragon +
personate +  and bilabiate +
white +, yellow +, red +, purple +  and mauve +
2.5 cm25 mm <br />0.025 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
Europe (Mediterranean region) +  and also in temperate regions nearly worldwide +
drupe-like +
curved +  and straight +
Greek anti, like or resembling, and rhinos, nose, alluding to shape of corolla +
1 +  and 4 +
poricidal +, septicidal +, loculicidal +  and dehiscence +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
terminal +  and axillary +
alternate +  and opposite +
persistent +  and deciduous +
ovate;lanceolate +
unequal +
entire +  and subentire toothed or lobed +
axile +  and parietal +
basal +, apical +  and superior +
tenuinucellate +, unitegmic +  and hemitropous +
campylotropous +, hemianatropous +  and anatropous +
5 +  and 4 +
thompson1988a +
minute +
Introduced +
climbing +  and scrambling +
sprawling +, creeping +  and prostrate +
filiform +
Antirrhinum +
Plantaginaceae +
annual +  and perennial +