XXVI SYNOPSIS OE THE NATTTKAL ORBEES. 



1 Leaves straight- or parallel-veined (belonging gene- 



rally to plants having 3-parted floral whorls or a 



6-parted perianth) * ,. • ■ • " 



Leaves net-veined (belonging generally to plants having 



a 5- or 4-parted floral whorl)! 3 



2 Seeds ui a seed-vessel _ 65 



Seeds apparently naked on an axillary scale or in a fleshy 



cup and solitary. Male fl. in catkins. L. linear or 

 subulate Ixiviii. Conifera. 



3 Fl. with a calyx and corolla 4 



Fl. with a perianth (calyx undistinguishable from co- 

 rolla) or none 52 



4 Corolla polypetaloiis, infferior ,;./.■ 5 



Corolla polypetalous, superior _ 31 



Corolla monopetalous (petals.cohering), superior 36 



Corolla monopetalous, mferior 41 



C Ojapeprmany,' distinct or united, eachi bearing a style ; r 



or solitary with one laWal placenta'.' "6 



Ovary solitary ; placentas 2 or more, parietal or on the 



dissepiments, not forining a central axis 13 



Ovary ^solitary ; placentas central , 18 



" 6 Corolla regular . ; '. .1 ...:... i'. .'.......'... . 7 



CiiroUa' irregular .■'...:....'...'.... 10 



7 Sepals distitict. Stamens hypo^yiiciiis ■. ,1 i '8 



Sepals mor6' oi- less (ictaibined helBw '.....' ■ & 



SStamengfew. Anth.''adnate; connective'Sxtending be- 



yOhd theni ......'.:......, Ixxix. Trilliacea. 



Stamens ind^fiiiite, 'usuailly maiiy (■^herifew, alternate' ■■ 

 with the petals).'" 'A^th. at top of filament, opening ' 

 by tvs^o' longitudinal 'clefts . :..'.. . :i'. Rammoulacem: 

 Stametis as niaB.^',as dnd opposite' to the petals. Anth. 



.at tjop of filament ,,'.'. . .'i, ii. Berberidaeeie. 



'9 Stamens as many as, 6t •twice the tmmber of the petals, 

 inserted at the base of th,e calyx. No stipules. 



' ' xxxiv. Crassulacece. 



* The leaves of these plaiits (Jttonocoiyledones). are nearly . always 

 parailel-Teined. 'A few exceptions are Dioscoreacece (Tamus), TVilH- 

 aoe<B (Paris), and A,rdceii, {Arum), which will he found by following 

 either series of oharacjirs. Care must be taken not to- confound 

 leaves hSLTing parallel veins which (fri connected' bt/ simple (ransvei^se 

 veins'mth. net-veined leaves/ 'The'bfoad leaves oiAlismaj {Potamogeton, 

 and Hydrohharis are examples of'the former. ' ■ , 



t The : narrow leaves of solne of these plants (^BicotyledoneS:) are 

 apparently parallel-veined. They are chiefly aquatics : , 

 Leaves divided in a pinnatifid t^ay. , 



XXX. Hfiloragaof<s (Myriophyllum). 

 Leaves repeatedly forked ...i..,,..,..lxxxiii. CeiratophylXacem. 

 Leaves simple xxx. Haloragacee (Hippiiris). 



