Buglossoides Moench

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1972, Flora Europaea. Volume 3. Diapensiacea to Myoporaceae, Cambridge: Cambridge University Press : 87

6. Buglossoides Moench 1

Like Lithospermum but annual or perennial herbs or dwarf shrubs; cymes all terminal; corolla white, blue or purple, infundibuliform or hypocrateriform, with 5 longitudinal bands of hairs inside, without invaginations, the annulus sometimes discontinuous; stamens sometimes inserted near base of tube; nutlets sometimes tuberculate.

1 Perennial; corolla 12-20 mm; nutlets smooth or punctatereticulate, white or yellowish, shining

2 Flowering stems procumbent, arising from previous year’s growth; leaves widest at the middle, not acuminate; corolla blue 3. calabra

2 Flowering stems erect, arising from the rhizome; leaves widest below the middle; corolla at first purple, then blue

3 Leaves sessile, amplexicaul, the lowest scale-like; corolla 12-14 mm; filaments inserted 1-1-5 mm above the base of the corolla-tube 2. gastonii

3 Lower leaves attenuate into petiole, not scale-like; corolla (12—)14—19 mm; filaments inserted 5-8 mm above the base of the corolla-tube 1. purpurocaerulea

1 Annual; corolla not more than 10 mm; nutlets ±tuberculate, brownish or greyish, not shining

4 Plant very glandular 6. glandulosa

4 Plant eglandular or with some glandular hairs on inflorescence

5 Indumentum of calyx yellowish; nutlets with a very fragile pericarp, distinctly 2-gibbous, with the base 0-5-0-75 mm wide 7. tenuiflora

5 Indumentum of calyx whitish; nutlets with ±hard pericarp,

not or only slightly 2-gibbous, with the base more than 0-75 mm wide

6 Calyx c. j as long as corolla-tube, very densely hispid; lobes obtuse 5. minima

6 Calyx distinctly more than | as long as corolla-tube, with long, sparse hairs; lobes acute 4. arvensis