''Digitalis nervosa'' is a species of

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (), commonly called angiosperms. The term "angiosperm" is derived from the Greek words ('container, vessel') and ('seed'), and refers to those plants th ...

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Plantaginaceae Plantaginaceae, the plantain family, is a large, diverse family of flowering plants in the order Lamiales that includes common flowers such as snapdragon and foxglove. It is unrelated to the banana-like fruit also called "plantain." In older cl ...

. It is native to the

Caucasus The Caucasus () or Caucasia (), is a region between the Black Sea and the Caspian Sea, mainly comprising Armenia, Azerbaijan, Georgia, and parts of Southern Russia. The Caucasus Mountains, including the Greater Caucasus range, have historically ...

down to north western and northern

Iran Iran, officially the Islamic Republic of Iran, and also called Persia, is a country located in Western Asia. It is bordered by Iraq and Turkey to the west, by Azerbaijan and Armenia to the northwest, by the Caspian Sea and Turkmeni ...

Description

''Digitalis nervosa'' are

perennial A perennial plant or simply perennial is a plant that lives more than two years. The term ('' per-'' + '' -ennial'', "through the years") is often used to differentiate a plant from shorter-lived annuals and biennials. The term is also wide ...

s from a woody rootstock, generally producing a single stem 30 to 80 cm tall with hairless (

glabrous Glabrousness (from the Latin ''glaber'' meaning "bald", "hairless", "shaved", "smooth") is the technical term for a lack of hair, down, setae, trichomes or other such covering. A glabrous surface may be a natural characteristic of all or part of ...

) foliage. The rosette leaves are entire,

sessile Sessility, or sessile, may refer to: * Sessility (motility), organisms which are not able to move about * Sessility (botany), flowers or leaves that grow directly from the stem or peduncle of a plant * Sessility (medicine), tumors and polyps that ...

, oblong-lanceolate in shape and 10 to 20 cm (sometimes to 30 cm) long and 2.5 to 5 cm (sometimes to 7 cm) wide. The leaves of the stem are sparsely distributed and 4 to 12 cm long. The flowers are 10 to 30 mm (sometimes to 50 mm) long, produced in a

raceme A raceme ( or ) or racemoid is an unbranched, indeterminate type of inflorescence bearing flowers having short floral stalks along the shoots that bear the flowers. The oldest flowers grow close to the base and new flowers are produced as the s ...

. The corolla is coloured light brown to yellow, its shape is short-campanulate (bell) with slightly inflated tubes, and there are glandular hairs along the margins. The filaments and pistil are hairless and the same length as the corolla tube, the anthers slightly surpass the tube on mature flowers. The fruits are a capsule 9 to 12mm long, ovate shaped with divergent lobes.

Ecology

In the wild ''Digitalis nervosa'' flowers in July and August. This species is found growing in broad-leafed forests.

References

{{Taxonbar, from=Q12838429 nervosa Flora of the Caucasus Flora of Iran