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    Home»Herbs and Spices»Facts about Yellow Foxglove – Digitalis lutea
    Herbs and Spices

    Facts about Yellow Foxglove – Digitalis lutea

    By SylviaSeptember 22, 2020Updated:September 22, 2020No Comments6 Mins Read
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    Digitalis lutea, the straw foxglove or small yellow foxglove, is a species of flowering plant in the plantain family Plantaginaceae. The plant is native to western and southern Europe and North West Africa. Straw Foxglove, Small yellow foxglove and yellow foxglove are some of the popular common names of the plant. The etymological root of the binomial name Digitalis is derived from the Latin digitus meaning ‘finger’, referring the shape of the flower. Specific epithet Lutea is from the Latin in reference to the large flowers of this species. It gets its common name from the straw-colored flowers it produces, which are less showy than those of other foxgloves. Like many foxgloves, this plant is often grown in gardens, where it willingly self-sows and can become weedy. It has received the Royal Horticultural Society’s Award of Garden Merit. Like all foxgloves, the plant is toxic if ingested.

    Yellow Foxglove Facts

    Yellow Foxglove Quick Facts
    Name: Yellow Foxglove
    Scientific Name: Digitalis lutea
    Origin Western and southern Europe and North West Africa
    Colors Light green while young, but they become dark brown as they mature
    Shapes Ovoid seed capsules
    Health benefits Used in the treatment of a weakened or failing heart, increase the strength of contraction, slowing and steadying the heart rate and lower blood pressure
    Name Yellow Foxglove
    Scientific Name Digitalis lutea
    Native Western and southern Europe and North West Africa
    Common Names Straw Foxglove, Small yellow foxglove, yellow foxglove
    Name in Other Languages Albanian: Luletogëza e verdhë
    Arabic: qameiat safra ( قمعية صفراء)
    Catalan: Didalera groga, Digital groga, Didalera, Didalera de sant jeroni
    Croatian: Zuti naprstak
    Czech: Náprstník žlutý
    Danish: Gul fingerbøl
    Dutch: Geel vingerhoedskruid
    English: Straw Foxglove, Small yellow foxglove, yellow foxglove
    Estonian: Kollane sõrmkübar
    Finnish: Pikkusormustinkukka
    French: Digitale jaune, Digitale à petites fleurs, Petite digitale, digitale penchée
    German: Gelber Fingerhut, Kleiner Gelber Fingerhut
    Hungarian: Vajsárga gyűszűvirág, kisvirágú gyűszűvirág
    Italian: Digitale gialla piccolo, digitale gialla minore, erba aralda
    Japanese: Kibanajigitarisu (キバナジギタリス)
    Norwegian: Gul revebjelle
    Polish: Naparstnica żółta
    Russian: Naperstyanka zhëltaya (наперстянка жёлтая)
    Slovak: Náprstník žltý
    Spanish: Dedalera amarilla, dedalera de San Jerónimo, digital amarilla, Dedalera de San Jerónimo, Digital amarilla, calzas de lobo, digital blanca
    Swedish: Liten fingerborgsblomma
    Upper Sorbian: Žołty naporst
    Welsh: Bysedd-y-cŵn melyn
    Plant Growth Habit Clump-forming, short-lived,  herbaceous, evergreen to semi-evergreen perennial or biennial plant
    Growing Climates Woodlands, hedgerows, uncultivated fields on siliceous soils, weedy meadows, overgrown thickets, disturbed open woodlands, upper slopes of wooded ravines, woodland glades, woodland margins and in grassland
    Soil Easily grown in average, medium moisture, well-drained soils in part shade. Prefers organically rich soils with consistent and regular moisture. Wet soils in winter can be fatal
    Plant Size 1 m (3.3 ft.) tall
    Root Taproot
    Stem Light to medium green central stem that is glabrous, terete, unbranched, and erect
    Leaf Dark green leaves are lanceolate with broadly serrate margins, are up to 25cm long, 6cm broad and spirally arranged
    Flowering season July
    Flower Yellow flowers are tubular, pendant up to 2cm long and arranged on a slender upright stalk
    Fruit Shape & Size Ovoid seed capsules
    Fruit Color Light green while they are immature, but they become dark brown and larger in size at maturity
    Propagation By reseeding
    Plant Parts Used Leaves
    Other Facts
    • An infusion of the plant added to the water in the vase will prolong the life of cut flowers.

    Plant Description

    Yellow Foxglove is a clump-forming, short-lived, herbaceous, and evergreen to semi-evergreen perennial or biennial plant that normally grows about 1 m (3.3 ft.) tall. The plant is found growing in woodlands, hedgerows, uncultivated fields on siliceous soils, weedy meadows, overgrown thickets, disturbed open woodlands, upper slopes of wooded ravines, woodland glades, and woodland margins and in grassland. It can be easily grown in average, medium moisture, well-drained soils in part shade. It prefers organically rich soils with consistent and regular moisture. Wet soils in winter can be fatal. The plant has taproot. Similarly the plant has light to medium green central stem that is glabrous, terete, unbranched, and erect.

    Leaves

    Along the stem, there are about 15-25 spreading alternate leaves. They are either sessile or clasp the stem at their bases. Individual leaves are 2½–6 inches long and ½–1¼ inches across. They are lanceolate-oblong to oblanceolate-oblong in shape and their margins have small widely-spaced teeth. The leaf surface is medium to dark green and usually glabrous, although fine hairs may occur along the veins of the leaf underside. Leaf tips are acute. Leaf venation is pinnate with a central vein and long outwardly curved lateral veins.

    Yellow Foxglove Image Gallery
    Closer-view-of-flower-of-Yellow-Foxglove Closer-view-of-flower-of-Yellow-Foxglove
    Flowers-of-Yellow-Foxgloves Flowers-of-Yellow-Foxgloves
    Immature-fruits-of-Yellow-Foxglove Immature-fruits-of-Yellow-Foxglove
    Leaves-of-Yellow-Foxglove Leaves-of-Yellow-Foxglove
    Mature-Fruits-of-Yellow-Foxglove Mature-Fruits-of-Yellow-Foxglove
    Other-Varieties-of-Yellow-Foxglove Other-Varieties-of-Yellow-Foxglove
    Plant-Illustration-of-Yellow-Foxglove Plant-Illustration-of-Yellow-Foxglove
    Seeds-of-Yellow-Foxglove Seeds-of-Yellow-Foxglove
    Sketch-of-Yellow-Foxglove Sketch-of-Yellow-Foxglove
    Small-Yellow-Foxglove-plant Small-Yellow-Foxglove-plant
    Yellow-Foxglove-Plant Yellow-Foxglove-Plant
    Yellow-Foxglove-Plant-growing-wild Yellow-Foxglove-Plant-growing-wild

    Flower

    The central stem terminates in a spike-like raceme of flowers about ½–1½ feet long. Each raceme has 15-50 flowers that are arranged largely along one side. Each flower is about ¾ inches long, consisting of a pale yellow or cream-colored corolla that has a swollen tubular shape, a medium to dark green calyx with 5 recurved teeth, 4 stamens (2 shorter & 2 longer), and an ovary with a long style. The corolla is slightly compressed vertically and it is widest toward the outer-middle. The mouth of the corolla is surrounded by a pair of upper lobes, 2 lateral lobes, and a slightly larger lower lobe. These lobes are more or less deltate (triangular) in shape, moderately small in size, and spread away from the mouth; they are often white-hairy to a greater or less degree. On some flowers, the lower lobe may be divided into 2 smaller lower lobes. The corolla interior is either spotless or brown-spotted. The anthers are light brown to brown. The pedicels of the flowers are very short and somewhat stout. Solitary leafy bracts up to 1¼” long occur underneath the flowers; they are linear-lanceolate in shape. The blooming period occurs from late spring to mid-summer for about 3 weeks. The flowers may have a sweet fragrance.

    Fruit

    Later, the fertile flowers are replaced by ovoid seed capsules. These seed capsules are light green while they are immature, but they become dark brown and larger in size at maturity. The capsules eventually split open to release their seeds.

    Traditional uses and benefits of Yellow Foxglove

    • Yellow foxglove is little used in herbal medicine but is in fact a less toxic alternative to the purple and woolly foxgloves (D. purpurea and D. lanata) which are widely used in the treatment of heart complaints.
    • The yellow foxglove has similar medical actions, but its alkaloids are more readily metabolized and flushed out of the body.
    • The leaves are cardiac, strongly diuretic, stimulant and tonic.
    • They are used in the treatment of a weakened or failing heart, increasing the strength of contraction, slowing and steadying the heart rate and lowering blood pressure by strongly stimulating the flow of urine – which reduces overall blood volume.

    Precautions

    • All parts of the plant are poisonous.
    • The plant is less dangerous that the common foxglove (D. purpurea) since its effects is not cumulative.
    • Excessive doses of yellow foxglove can prove fatal.
    • This plant is subject to legal restrictions in some countries.

    References:

    https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=33584#null

    https://pfaf.org/user/Plant.aspx?LatinName=Digitalis+lutea

    https://www.cabi.org/isc/datasheet/113897

    http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=c628

    http://www.floracatalana.net/digitalis-lutea-l-subsp-lutea

    https://plants.usda.gov/core/profile?symbol=DILU

    http://luirig.altervista.org/schedenam/fnam.php?taxon=Digitalis+lutea

    https://en.wikipedia.org/wiki/Digitalis_lutea

    http://www.theplantlist.org/tpl1.1/record/kew-2768038

    http://plantsoftheworldonline.org/taxon/urn:lsid:ipni.org:names:802039-1

    https://gd.eppo.int/taxon/DIKLU

    https://gobotany.nativeplanttrust.org/species/digitalis/lutea/

    https://www.illinoiswildflowers.info/weeds/plants/str_foxglove.html

    https://davesgarden.com/guides/pf/go/747/#b

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    Yellow Foxglove Scientific Classification

    Scientific Name: Digitalis lutea

    Rank Scientific Name & (Common Name)
    Kingdom Plantae (Plants)
    Subkingdom Tracheobionta (Vascular plants)
    Infrakingdom Streptophyta  (land plants)
    Super Division Spermatophyta (Seed plants)
    Division Magnoliophyta (Flowering plants)
    Sub Division Spermatophytina  (spermatophytes, seed plants, phanérogames)
    Class Magnoliopsida (Dicotyledons)
    Sub Class Asteridae
    Super Order Asteranae
    Order Scrophulariales
    Family Plantaginaceae  (plantains)
    Genus Digitalis L. (foxglove)
    Species Digitalis lutea L. (straw foxglove)
    Synonyms
    • Digitalis argyrostigma
    • Digitalis aurea Desf.
    • Digitalis fontanesii Steud.
    • Digitalis guellii Sennen
    • Digitalis lutea var. bracteata Lej. & Courtois, 1831
    • Digitalis lutea var. ciliata Lej. & Courtois, 1831
    • Digitalis lutea var. glanduloso-villosa F.Gérard, 1890
    • Digitalis lutea var. grandiflora
    • Digitalis lutea var. hirsuta Coss. & Germ., 1861
    • Digitalis lutea var. media Wender.
    • Digitalis lutea var. minor Wender.
    • Digitalis lutea var. pubescens Bréb.
    • Digitalis ornata Porta
    • Digitalis ornata Porta ex Huter
    • Digitalis parviflora All., 1773
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