Chamaecytisus Link

13. Chamaecytisus Link View in CoL 1

Unarmed shrubs or the branches sometimes spinose. Leaves 3- foliolate. Flowers in leafy racemes or in terminal heads subtended by a leafy involucre. Calyx tubular, bilabiate; upper lip with 2 teeth, lower with 3 teeth, the teeth much smaller than the lips; corolla yellow, rarely white or purple; stigma capitate or extrorse. Legume dehiscent, somewhat compressed, black. Seeds strophiolate.

A taxonomically difficult genus in which interspecific hybridization appears to be of frequent occurrence.

Literature: as for Cytisus and the following: A. Holubovâ- Klâskovâ, Acta Univ. Carol. (Biol.) 1964 (Suppl. 2): 1-24 (1964).

1 Flowers in leafy racemes

2 Older branches becoming spinose

3 Legume pubescent only along the sutures; standard 25-35 mm; leaflets appressed-pubescent above 3. spinescens 3 Legume pubescent all round; standard 12-25 mm; leaflets glabrous or subglabrous above

4 Young branches glabrous; legume white-villous 1. creticus 4 Young branches appressed-pubescent; legume appressed- grey-tomentose 2. subidaeus 2 Older branches not becoming spinose

5 Corolla purple, white or pinkish-white

6 Corolla purple 4. purpureus 6 Corolla white or pinkish-white

7 Leaflets glabrous above; legume glabrous 17. graniticus 7 Leaflets appressed-pubescent on both surfaces; legume appressed-pubescent 18. skrobiszewskii 5 Corolla yellow

8 Legume glabrous, citiate or sparsely hairy (5-10). hirsutus group 8 Legume uniformly pubescent

9 Standard pubescent outside

10 Standard with spots near the base

11 Leaves appressed-hairy above; calyx appressed-hairy

11. borysthenicus 11 Leaves glabrous above; calyx patent-hairy

(5-10). hirsutus group 10 Standard without spots

12 Branches patent-pubescent or -hirsute; calyx patentpubescent or -hirsute (5-10). hirsutus group 12 Branches glabrous below, densely ± appressedpubescent above; calyx densely villous-tomentose

12. lindemannii 9 Standard glabrous outside

13 Standard without spots at the base

14 Branches appressed-villous; leaflets sparsely appressedpubescent above 16. ruthenicus 14 Branches patent-pubescent or -hirsute; leaflets densely pubescent above (5-10). hirsutus group 13 Standard with spots at the base

15 Standard with orange-red spots; inflorescence 1-sided, some branches procumbent; leaves glabrous when mature 13. ratisbonensis 15 Standard with violet or brown spots; inflorescence not 1-sided; branches all erect or ascending; leaves remaining pubescent at least beneath

16 Flowers 1-2 in a fascicle; spots violet 14. zingeri 16 Flowers 2-5 in a fascicle; spots brown

17 Indumentum golden; leaves glabrous above

15. paczoskii 17 Indumentum white; leaves pubescent on both surfaces 16. ruthenicus

1 Flowers in heads, subtended by a leafy involucre

18 Corolla white

19 Plant procumbent; indumentum of crispate and straight hairs 34. kovacevii 19 Plant erect; indumentum of straight hairs

20 3 upper teeth of calyx triangular-lanceolate; stem with both appressed and patent hairs 30. albus 20 3 upper teeth of calyx linear-subulate; stem with all hairs semi-patent 35. nejceffii 18 Corolla yellow or pale yellow

21 Branches with at least some patent or semi-patent hairs

22 Leaflets linear, green on both surfaces 27. dorycnioides 22 Leaflets elliptical to lanceolate, greyish or whitish at least beneath

23 Legume appressed-hairy

24 Calyx patent-hairy

25 Leaflets 7-10 mm wide, sparsely patent-hairy beneath

33. podolicus 25 Leaflets 3-6 mm wide, densely whitish-sericeous beneath 21. austriacus 24 Calyx appressed-hairy

26 Hairs on branches mainly appressed; flowers in heads of 5-8 31. banaticus 26 Hairs on branches all patent; flowers in heads of 12-18

32. rochelii 23 Legume patent-hairy

27 Leaflets (10—)15—35 mm, sparsely pubescent to subglabrous above 19. supinus 27 Leaflets 10-17 mm, densely appressed-sericeous on both surfaces 20. eriocarpus 21 Branches appressed-hairy

28 Leaflets glabrous or sparsely pubescent above

29 Calyx appressed-hairy

30 Leaflets 5-8 mm; some branches procumbent

24. pygmaeus 30 Leaflets 12-30 mm; branches erect or ascending

31 Corolla pale yellow; legume 30-40 mm, shortly appressed-hairy 31. banaticus 31 Corolla deep yellow; legume 25-28 mm, densely sericeous 23. heuffelii 29 Calyx patent-hairy

32 Leaflets 15-20 mm, green on both surfaces

33 Leaflets obovate; legume villous 22. tommasinii 33 Leaflets linear; legume lanate 27. dorycnioides 32 Leaflets 20-35 mm, greyish-hairy beneath

34 Branches erect, with appressed hairs only; flowers in heads of 6-8 28. litwinowii 34 Branches ascending, with both patent and appressed hairs; flowers in heads of 10-12 32. podolicus 28 Leaflets densely appressed-hairy on both surfaces

35 Calyx appressed-hairy

36 Leaflets 10 x 2-2-5 mm, linear to linear-spathulate

25. jankae 36 Leaflets 12-30x4-8 mm, lanceolate to oblong-obovate

37 Branches with appressed hairs only; leaflets 12-22 x

4-8 mm 29. blockianus 37 Branches with both patent and appressed hairs; leaflets 20-30 x 5-6 mm 31. banaticus 35 Calyx patent-hairy

38 Legume sericeous 21. austriacus 38 Legume lanate

39 Leaflets elliptical, lanceolate or obovate; branches with long patent hairs 20. eriocarpus 39 Leaflets linear; branches sericeous 26. danubialis (i) Inflorescence racemose.