-METCALFE and C H A L K . ( 1 9 7 9 ) • : A n a t o m y o f t h e vol-1.2nd edition.Clarendon -PANT,D.D.(1965)•;0n mologous the press.Oxford. ontogeny of stornata < ho- hair terminology. 30:239-255. ^^PPC^Cl'OLI,L.Tl904) . : I 1 l e g n o e l a Nuovo and o t h e r structures.PI.sci.ser,1,1-24. -PAYNE,W.W.(1978)•iA g l o s s a r y o f p l a n t Brittonia dicotyledons. corteccia della Cistacea. giorn.bot.ltal.,X1,1904,473-504. ^-PONZC,A.(1921).:Considerazioni sulli Cistaceae.Nuovo g. Bot.Ital.,N.S.28(2),157-73-PRIESTLEY, J . H . ( 1 9 ^ 3 ) . : T h e cuticle in angiosperms.Bot.rev.9 : 593-616. -PROCTOR,M.C.F.(1956).:Helianthemum(Biological flora).J.Ecol. 44,675-692. -PROCTOR,M.C.F.(1958).:Ecological the distributions of and h i s t o r i a l the Helianthemum factors in species.Jour.Ecol.46(2) 349-371. -PROCTOR,M.C.F.(1957-61).: Variation in Britain.Watsonia 4:28-40. -PROCTOR,M.C.F.(1968).tlnfraspesific cum(L. ) w i l i d . , s e n s u rium H.canum(L)Baumg.in lato,and variation H.oleandi- H.canum(L.)Baumg.Xeddes 79( 1 - 2 ) ; 5 7 - 5 9 - B e r l £ n . , systeniatics .Harper reperto- , -RADFORD,A.E.,DICKINSON,W.C.,MASSE Y, J . R . , a n d ( 1974 ) . : V a s c u l a r p l a n t in C.RITCHIE BELL. and Row, P u b l i s h e r s . New Y"ork , E v a n s t o n , S a n F r a n c i s c o , L o n d o n . -RAMAYYA,N.(1972).: C l a s s i f i c a t i o n and p h y l o g e h y o f chomes o f trends angiosperms.In Research -REICHE,K.(I895).:Cistaceae.In Engler lichen pflanzenfamilien in plant the anatomy. and P r a n t l , D i e 111(6)s299-306.Leipzig. tri- natür-