Viper's grass

Scorzonera humilis is a perennial herb with a stout, vertical, black rootstock. The stems are solitary or few, ranging from 5 to 120 cm in height, and are yellowish-green, erect or ascending. Initially arachnoid-hairy, the stems become nearly glabrous. The leaves are 5-30 x 0.3-3.5 cm in size, medium yellowish-green on the upper surface and paler beneath, flat, and linear to lanceolate-elliptical or ovate-elliptical in shape. The leaves are long-acute to long-acuminate at the apex, entire, and gradually narrowed at the base into a half-sheathing, usually distinct petiole. The upper cauline leaves are much narrower than the lower cauline and basal ones but more abruptly widened into a semiamplexicaul base. The plant produces usually solitary capitula, 20-35 mm in diameter, with involucral bracts in several rows, green with scarious tips and margins. The flowers are 30-60 mm long, all ligulate, with pale to medium yellow ligules, often reddish or brownish on the outer face of the outer flowers. The achenes are 7-11 mm long, cylindrical but angled, with minutely crenate-tuberculate ribs, and the pappus is 10-15 mm long, dirty white, of several rows of plumose hairs. The plant flowers for a very short period, typically in May and July.

Scorzonera humilis is typically found in moist meadows and other open, grassy habitats. In Britain, it is restricted to such environments in Dorset, Warwick, and South Wales. The plant prefers well-drained soils and is often associated with calcareous or neutral substrates. It is adapted to temperate climates and is commonly found in regions with moderate rainfall and full sun exposure.

Cultivating Scorzonera humilis requires attention to its preference for moist, well-drained soils and full sun. It is best suited for rock gardens, meadow plantings, or wildflower gardens where it can thrive in a naturalistic setting. The plant is relatively low-maintenance once established and does not require frequent watering. Propagation can be achieved through seed sown in early spring or by division of the rootstock in the autumn. Due to its short flowering period and specific habitat requirements, it may be challenging to grow outside of its native range and is not commonly cultivated for ornamental purposes.

Scorzonera humilis is primarily of ecological interest, serving as a nectar source for various bees and other insects. It is not widely used in horticulture or agriculture due to its specific habitat requirements and short flowering period. However, it may be of value in conservation projects aimed at preserving native flora and supporting pollinator populations. The plant's rarity in certain regions, such as Britain, highlights its importance in local biodiversity and habitat restoration efforts.