SYNOPSIS OF THE KATTJEAl OBDEES. XXVll 



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



rally to plants having 3-parted floral whorls or a 



6-parted perianth) * 2 



Leaves net-veined (belonging generally to plants 

 having a 5- or 4-parted floral whorl) t 3 



2 Seeds in a seed-vessel 62 



Seeds apparently naked on an axillary scale or in a 



fleshy cup and solitary. Male fl. in catkins. L. 

 linear or subulate Ixxix. CmiifercB. 



3 Fl. with a calyx and corolla 4 



Fl. with a perianth (oaljTi: imdistinguishable from co- 

 rolla) or none 50 



4 Corolla polypetalous, inferior 5 



OoroUa polypetalous, superior 29 



Corolla gamopetalous (petals cohering), superior .... 34 

 Corolla gamopetalous, inferior 39 



5 Ovaries many, distinct orunited, each bearing a style ; 



or solitary with one lateral placenta 6 



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



dissepiments, not forming a central axis 13 



Ovary solitary ; placentas central 17 



6 Corolla regular 7 



Corolla irregular 10 



7 Sepals distinct. Stamens hypogynous 8 



Sepals more or less combined below 9 



8 Stamens few. Anth. adnate ; connective extending be- 



yond them Ixxx. Trilliaceee. 



Stamens indefinite, usually many (when few, alternate 



with the petals) . Anth. at top of filament, opening 



by two longitudinal clefts i. ManunadacecB. 



Stamens as many as and opposite to the petals. Anth. 



at top of filament ii. Berberidacece. 



* The leaves of these plants {MonocotyUdones) are nearly always 

 parallel-veined. A few exceptions are Dioscoreaceis (Tamus), TriUi- 

 dcecB (Paris), and Aracem {Arum), which will be found by following 

 either series of characters. Care must be taken not to confound 

 leaves having •parallel veins which are connected by simple transverse 

 veins with net-veined leaves. The broad leaves of Alisma, Fotamogeton, 

 and Hydrocharis are examples of the former. Pinnatifid leaves with 

 linear lobes as in Anemone Fulsatella, may be mistaken for parallel- 

 veined leaves ; also the submersed leaves of Ranunculi. 



t The narrow leaves of some of these plants {Dicotyledones) are 

 apparently parallel-veined. They are chiefly aquatics : 

 Leaves divided in a pinnatifid way. 



XXX. Hahragacem (Myriophyllum). 



Leaves repeatedly. forked Ixxiii. Ceraiophyllacece. 



Leaves simple xxx. Haloraqace(s (Hippuris). 



62 



