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M. C. F. PROCTOR 



Fig. 1. Chromosomes of Cistaceae ( X 1,200) : g, i, o, p, and r are pollen mother cell meiosis; the remainder 

 are from root tip preparations, (a) Halimium ocymoides, Sintra, Portugal; (b) H. halimifolium, Sesimbra, 

 Portugal; (c) H. umbellatum, Almada, Portugal; (d) Tuberaria vulgaris, Sintra, Portugal; (e) T. guttata, Sintra, 

 Portugal; {f)T. guttata, Finistere, France; (g) Helianthemum apenninum, Berry Head, Devon; (h) H. apenni- 

 num, Les Andelys, France; (i) H. chamaecistus, Humphrey Head, Lanes.; (j) H. chamaecistus , Risby, Suffolk; 

 (k) H. chamaecistus, Yorkshire Wolds; (1) H. chamaecistus, Perthshire; (m) H. chamaecistus, Visp, Switzer- 

 land; (n) /"/. ledifolium, Sintra, Portugal; (o) H. canum, Teesdale, Yorks.; (p) H. canum, Rhossili, Glamorgan- 

 shire; (q) H. canum, Kendal, Westmorland; (r) H. oelandicum, Oland, Sweden; (s) H. lunulatum; (t) Fumana 



laevipes, Portinho, Portugal. 



