Flora of North America species comparison

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Digitalis grandiflora

yellow foxglove
Stems

50–100 cm, pilose to villous, hairs glandular and eglandular.
Leaves

blade lanceolate to oblanceolate, 10–21 × 2–4 cm, margins finely and evenly serrate distally, with a glandular tip.
Inflorescences

secund, glandular-pilose, bracts 20–30 mm.
Pedicels

pendent, 5–12 mm, glandular-pilose.
Flowers

sepals narrowly lanceolate, 8–12 × 1.5–2 mm, villous;

corolla tube pale yellow, funnelform, 25–40 mm, throat 14–20 mm diam., abaxial lip pendent, pale yellow often marked by brown veins, broadly rounded to broadly triangular, 3–4 mm.
Capsules

ovoid, 8–11 mm, glandular-pilose.
Seeds

brown to black, prismatic, 1 mm, finely reticulate-alveolate.
2n

= 56 (Europe).

Digitalis grandiflora
Phenology Flowering Mar–Jul.
Habitat Disturbed sites, roadsides, old fields.
Elevation 0–1000 m. (0–3300 ft.)
Distribution
from FNA
CT; MA; ME; MI; MN; MT; NH; NY; OH; VT; WI; ON; e Europe; w Asia [Introduced in North America; introduced also in South America, elsewhere in Europe, elsewhere in Asia, Africa, Australia]
[BONAP county map]
Discussion

Plants of Digitalis grandiflora are occasionally found in cultivation and sometimes escape in the northeastern part of the flora area.

Although the names Digitalis grandiflora and D. orientalis were published at the same time, D. grandiflora has long been the preferred name for this species and has been in general use since it was published. The name D. orientalis Miller was long confused with the later homonym D. orientalis Lamarck, a synonym of D. lanata.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 258.
Parent taxa Plantaginaceae > Digitalis
Sibling taxa
D. lanata, D. lutea, D. purpurea
Synonyms D. ambigua, D. orientalis
Name authority Miller: Gard. Dict. ed. 8, Digitalis no. 4 [ — as magno flore], corr. 1768
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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