Chaenorhinum origanifolium

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 : 225

1. C. origanifolium (L.) Fourr. , Ann. Soc. Linn. Lyon nov. ser., 17: 127 (1869)

( Linaria origanifolia (L.) Cav. ).

Perennial; stems up to 35(-5O) cm, numerous, ascending to erect, simple or branched. Leaves lanceolate to suborbicular, acute to obtuse. Racemes lax, at least in fruit; bracts linear to lanceolate; pedicels usually erecto-patent in fruit. Calyx-lobes linear-spathulate to oblanceolate. Corolla 9-20 mm; spur 2—5(—6) mm. Capsule subglobose; loculi only slightly unequal. 2« = 14. Calcareous rocks and walls. S. W. Europe. BI Ga Hs It Lu.

Very variable; it seems probable that further subspecies, in addition to those described below, should be recognized.

1 Stems, petioles and pedicels covered with short, white, patent or deflexed, eglandular hairs (d) subsp. segoviense 1 Plant glabrous below, more or less glandular-pubescent above

2 Leaves up to 10(—13) mm wide, ovate to suborbicular (rarely lanceolate); calyx 5-8 mm; capsule usually more than 3 mm

(a) subsp. origanifolium 2 Leaves not more than 5 mm wide, narrowly elliptical to lanceolate; calyx 3-6 mm; capsule not more than 3 mm

3 Leaves usually thin; stems slender, flexuous or pendent

(b) subsp. cadevallii 3 Leaves thick and rigid; stems rigid (c) subsp. crassifolium