Chaenorhinum (DC.) Reichenb.

13. Chaenorhinum (DC.) Reichenb. 2

Annual or perennial herbs. Leaves entire, shortly petiolate and usually opposite below, sessile and opposite or alternate above, those subtending flowers always alternate. Flowers in terminal, bracteate racemes or solitary in the leaf-axils. Calyx deeply and somewhat unequally 5-lobed. Corolla with more or less cylindrical tube, produced at the base into a straight spur; limb 2- lipped, the upper lip 2-lobed, the lower 3-lobed and with a low palate which does not close the mouth of the tube. Stamens 4, didynamous, included. Capsule obliquely ovoid to subglobose, with unequal loculi opening by pores. Seeds numerous, oblongellipsoid to truncate-conical, with smooth or variously ornamented, longitudinal ribs. Literature: T. M. Losa Espana, Anal. Inst. Bot. Cavanilles 21:

545-566 (1963). 1 Perennial 2 Non-flowering stolons, bearing only scale-leaves, present at base of plant 2. glareosum

2 Stolons absent 3 Corolla 6-8 mm, white 4. tenellum 3Corolla at least 9 mm, blue, lilac, pink or yellow

4 Capsule ovoid, with loculi very unequal in length; spur of corolla 5-5-8 mm 5. macropodum

4 Capsule subglobose, with loculi not very unequal in length; spur of corolla 2-5(-6) mm

5 Stems densely glandular-villous throughout, with translucent, yellowish hairs; pedicels recurved in fruit

3. villosum

5 Stems glabrous below (rarely with short, white, eglandular hairs); pedicels usually erecto-patent in fruit

1. origanifolium

1 Annual 6 Basal leaves usually in a rosette; spur of corolla acute, evenly tapered from the base

7Spur at least as long as corolla-tube; lips of corolla widely divergent 8. grandiflorum

7 Spur usually shorter than corolla-tube; lips of corolla not widely divergent 9. rubrifolium

6 Basal leaves usually not in a rosette; spur of corolla obtuse to subacute, ± cylindrical or inflated in the middle

8 Corolla not more than 9 mm; spur 1•5-2- 5 mm, ± cylindrical 10. minus

8Corolla at least 9 mm; spur 3-5 mm, somewhat inflated in the middle

9

Calyx-lobes not more than 1 mm wide; corolla 9-17 mm, lilac with darker veins 6. serpyllifolium

9

Calyx-lobes 1-2 mm wide; corolla 13-19 mm, with blue lips and yellowish palate, spur and tube 7. robustum