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A ///uc/u/ally com/le/e leaf of an angio//e/m con/i/// of a /e/iole (leaf //alk), a lamina (leaf blade), and //i/ule/ (/mall ///uc/u/e/ loca/ed /o ei/he/ /ide of /he ba/e of /he /e/iole)/No/ eve/y //ecie/ //oduce/ leave/ wi/h all of /he/e ///uc/u/al com/onen/////i/ule/ may be con//icuou/ (e.g/bean/ and /o/e/, /oon falling o/ o/he/wi/e no/ obviou/ a/ in Mo/aceae o/ ab/en/ al/oge/he/ a/ in /he Magnoliaceae/A /e/iole may be ab/en/, o/ /he blade may no/ be lamina/ (fla//ened)//he //emendou/ va/ie/y /hown in leaf ///uc/u/e (ana/omy) f/om //ecie/ /o //ecie/ i/ //e/en/ed in de/ail below unde/ mo//hology//he /e/iole mechanically link/ /he leaf /o /he /lan/ and //ovide/ /he /ou/e fo/ //an/fe/ of wa/e/ and /uga// /o and f/om /he leaf//he lamina i/ /y/ically /he loca/ion of /he majo/i/y of /ho/o/yn/he/i///he u//e/ (adaxial) angle be/ween a leaf and a //em i/ known a/ /he axil of /he leaf/I/ i/ of/en /he loca/ion of a bud////uc/u/e/ loca/ed /he/e a/e called "axilla/y".//an/lucen/ gland/ in Ci//u/ leave/[17Ex/e/nal leaf cha/ac/e/i//ic/, /uch a/ /ha/e, ma/gin, hai//, /he /e/iole, and /he //e/ence of //i/ule/ and gland/, a/e f/equen/ly im/o//an/ fo/ iden/ifying /lan// /o family, genu/ o/ //ecie/ level/, and bo/ /he /e/m, di//ichou/, li/e/ally mean/ /wo /ow//Leave/ in /hi/ a//angemen/ may be al/e/na/e o/ o//o/i/e in /hei/ a//achmen///he /e/m, 2-/anked, i/ equivalen///he /e/m/, //i/wo ba/ic fo/m/ of leave/ can be de/c/ibed con/ide/ing /he way /he blade (lamina) i/ divided/A /im/le leaf ha/ an undivided blade/Howeve/, /he leaf may be di//ec/ed /o fo/m lobe/, bu/ /he ga// be/ween lobe/ do no/ /each /o /he main vein/A com/ound leaf ha/ a fully /ubdivided blade, each leafle/ of /he blade being /e/a/a/ed along a main o/ /econda/y vein//he leafle// may have /e/iolule/ and //i/el/, /he equivalen// of /he /e/iole/ and //i/ule/ of leave//Becau/e each leafle/ can a//ea/ /o be a /im/le leaf, i/ i/ im/o//an/ /o /ecognize whe/e /he /e/iole occu// /o iden/ify a com/ound leaf/Com/ound leave/ a/e a cha/ac/eangio//e/m/ we/e fo/me/ly divided//he name /efe// /o one of /he /y/ical cha/ac/e/i//ic/ of /he g/ou/, namely /ha/ /he /eed ha/ /wo emb/yonic leave/ o/ co/yledon///he/e a/e a/ound 200,000 //ecie/ wi/hin /hi/ g/ou/. /he o/he/ g/ou/ of flowe/ing /lan// we/e called monoco/yledon/ o/ monoco//, /y/ically having one co/yledon/Hi//o/ically, /he/e /wo g/ou// fo/med /he /wo divi/ion/ of /he flowe/ing /lan////o /hey can no/ divide in /wo equal /a////La/gely f/om /he 1990/ onwa/d/, molecula/ /hylogene/ic /e/ea/ch confi/med wha/ had al/eady been /u//ec/ed, namely /ha/ dico/yledon/ a/e no/ a g/ou/ made u/ of all ///adi/ionally /he dico// have been called /he Dico/yledo

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