Draba bertiscea

Draba bertiscea is a densely or laxly caespitose perennial herb. At anthesis it is 1.5–10 mm (0.059–0.394 in) tall, growing to 13 mm (0.51 in) when fruiting. It has a lignified taproot up to 2 mm (0.079 in) in diameter.^[1]

The rosette leaves are lanceolate or lingulate, rarely elliptical, measuring 2.5–9 mm (0.098–0.354 in) long by 0.8–2 mm (0.031–0.079 in) wide. They are glabrous, with margins that are typically without cilia (very rare exceptions exist).^[1]

The flowering scape is glabrous, bearing a condensed, corymbose inflorescence that becomes subcapitate in fruit. The plant produces 1–8 small flowers. The sepals are 1.1–2.1 mm (0.043–0.083 in) long, glabrous, with rounded apices and hyaline margins. The petals are yellow, lanceolate-obovate, measuring 2–4 mm (0.079–0.157 in) long. The stamens are 0.8–1.7 mm (0.031–0.067 in) long with anthers approximately 0.25 mm (0.0098 in) long.^[1]

The silicules are elliptical, glabrous, measuring 3–4 mm (0.12–0.16 in) long by 1.5–2 mm (0.059–0.079 in) wide, on pedicels 1.5–8 mm (0.059–0.315 in) long. The style is 0.3–0.6 mm (0.012–0.024 in) long. The seeds are ovate, approximately 0.7 mm (0.028 in) long.^[1]

Draba bertiscea is endemic to Montenegro and is known only from its type locality on the Maja Kolata peak of the Prokletije massif in the southeastern part of the country.^[1]

It grows in fixed, calcareous screes around persistent snow patches at approximately 2,200 m (7,220 ft) altitude. The habitat is a north-facing, slightly inclined slope on dolomitic limestone. The site is covered by snow until late June or July, resulting in a short growing season of 3–4 months. Associated species include Trifolium pallescens, Plantago atrata, Dryas octopetala, Salix retusa, and Polygonum viviparum. The species is sympatric with the related Draba compacta, which inhabits south-facing rocky ground.^[1]