Digitalis purpurea |
Digitalis |
|||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
common foxglove, digitale pourpre, foxglove, purple foxglove |
foxglove |
|||||||||||||
Habit | Herbs [shrubs], biennial or perennial. | |||||||||||||
Stems | erect, simple or branching from base, glabrous, glabrate, pilose, or villous. |
|||||||||||||
Leaves | basal and cauline, alternate, smaller distally; petiole absent [present]; blade not fleshy, not leathery, margins entire or serrate to coarsely doubly serrate. |
|||||||||||||
Inflorescences | terminal, racemes, often secund; bracts present. |
|||||||||||||
Pedicels | present; bracteoles usually absent. |
|||||||||||||
Flowers | bisexual; sepals 5, distinct, narrowly triangular to lanceolate or ovate-lanceolate, calyx ± bilaterally symmetric, campanulate; corolla brown, yellow, pink to purple, or white, bilaterally symmetric, ± bilabiate, funnelform, tubular-funnelform, or globular to ovoid, tube base not spurred or gibbous, lobes 5, abaxial 3, adaxial 2; stamens 4, adnate to corolla, didynamous, filaments glabrous or hairy; staminode 0; ovary 2-locular, placentation axile; stigma 2-lobed or punctiform. |
|||||||||||||
Fruits | capsules, dehiscence septicidal, sometimes secondarily loculicidal. |
|||||||||||||
Seeds | 20–60, brown to black, prismatic or cylindric to ovoid, wings absent. |
|||||||||||||
× = 28. | ||||||||||||||
Digitalis purpurea |
Digitalis |
|||||||||||||
Distribution |
AR; CA; CO; CT; ID; MA; MD; ME; MI; MT; NC; NH; NJ; NY; OH; OR; PA; UT; VT; WA; WI; WV; WY; BC; NB; NF; NS; ON; QC; Europe [Introduced in North America; introduced also in Mexico, Central America, South America, Asia, Africa, Pacific Islands (New Zealand), Australia]
|
Europe; w Asia [Introduced in North America; introduced also nearly worldwide] |
||||||||||||
Discussion | Subspecies 5 (1 in the flora). Digitalis purpurea was once used as a commercial source of digitalin, is widely cultivated, and has many cultivars. Some plants have been identified as European subspecies; all variability in the flora area appears to be from cultivars of subsp. purpurea. Digitalis ×mertonensis B. H. Buxton & C. D. Darlington (strawberry or giant foxglove) is a hybrid of D. purpurea with D. grandiflora that is sometimes cultivated. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Species 22 (4 in the flora). All species of Digitalis are poisonous, containing cardiac glycosides including digitoxin. In addition to the following species, D. ferruginea Linnaeus is sometimes found in cultivation in North America. It has yellow to yellow-brown corollas, like D. lanata, but the corolla tubes are elongate, not globular. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
||||||||||||
Key |
|
|||||||||||||
Source | FNA vol. 17, p. 259. | FNA vol. 17, p. 258. | ||||||||||||
Parent taxa | Plantaginaceae > Digitalis | Plantaginaceae | ||||||||||||
Sibling taxa | ||||||||||||||
Subordinate taxa | ||||||||||||||
Name authority | Linnaeus: Sp. Pl. 2: 621. (1753) | Linnaeus: Sp. Pl. 2: 621. (1753): Gen Pl. ed. 5, 272. (1754) | ||||||||||||
Web links |
|