Phlomis linearis Boissier & Balansa
Diagn. ser. 2(4):46 (1859)

Distribution in the wild:
Endemic to Turkey, in steppe, rocky igneous slopes, volcanic rubble at 1350-2400 m.

Flowering in the wild:June-August

linearis means narrow with both sides parallel and refers to the leaves.

Closely related to P. armeniaca Willdenow and P. angustissima Huber-Morath. Distinguished from them by its calyces which are densely hairy and not constricted above.

Herbaceous perennial 10-30(–40) cm, ± eglandular. Basal leaves greenish above, greyish tomentose below, basal leaves linear-lanceolate, acutish, 2-12 × 0.7-2 cm, tapering into a petiole to 5 cm. Stem leaves smaller, shortly petioled. Floral leaves linear to linear-lanceolate. One to four whorls per stem, 4-10 flowered. Bracteoles linear-subulate, 8-12 mm, stellate-tomentose. Calyx 12-14 mm, densely  yellow tomentose ; teeth ovate-triangular, acuminate, 3-7 mm. Corolla yellow, 30-35 mm.  Nutlets hairy at apex.

P. linearis var. plumosa Boissier 

This variety has an extremely feathery calyx covering. Hardy to -15°C

Natural hybrids:

P. × kalanensis Huber-Morath
Bauhinia 6 (30: 374, (1979)
(= P. linearis Boiss. & Bal. × P. oppositiflora Boiss. & Haussk.)

Differs from P. linearis with whorls 2-6 flowered, wide teeth and bracteoles 2-8 mm long.

Differs from P. oppositiflora with whorls of 2-8 flowered, calyx not tomentose, bracteoles developed.

P. × tunceliensis Huber-Morath
Bauhinia 6 (30:374, (1979)
(= P. kurdica K.H. Rechinger × P. linearis Boissier & Balansa)

Differs from P. kurdica by having narrower lanceolate leaves, truncate at base; bracteoles to 10 mm long.

Differs from P. linearis by having wider leaves, base truncate to subcordate.