SYNOPSIS OF IHE NATURAL ORDERS. XXyii 



1 Leaves straight- or parallel-veined rbelonging gene- 



rally to plants having 3-parted floral whorls or a 



6-parted perianth) * 2 



Leaves net-veined (helonging generally to plants 

 having 5- or 4-parted floral whorls) t 3 



2 Seeds in a seed-veasel 62 



Seeds apparently naked on an axillary scale or in a 



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

 linear or subiilate Ixxix. Coniferce. 



3 Fl. with a calyx and corolla 4 



Fl. with a perianth (calyx undistinguishaHe from co- 

 rolla) or none 50 



4 Corolla polypetalous, inferior 5 



CoroDa polypetalous, superior 29 



OoroUa gamopetalous (petals cohering), superior. ... 84 

 Corolla gamopetalous, inferior 39 



5 Ovaries many, distinct or united, each hearing a style ; 



or soKtary 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 leas combined below 9 



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



yond them .Ixxx. TrilUaoece. 



Stamens indefinite, usually many (when few, alternate 



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



by two longitudinal clefts i. Ranunculaoets. 



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



at top of filament ii. Berheri ' 



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

 parallel-veined. A few exceptions are Dioscoreacece ( Tamus), Trilli- 

 acem {Paris), and Aracea {Armm), which will be found by following 

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

 leaves hstying parallel veins which are connected by simple transverse 

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

 and Hydrocharis are examples of the former. Pinnatifid leaves with 

 hnear lobes as in Anemone Pulsatilla, may be mistaken for parallel- 

 veined leaves ; also the submersed leaves of Banunculi. 



t The narrow leaves of some of these plants (J)iootyledones) are 

 apparently parallel-veined. They are chiefly aquatics : 

 Leaves divided in a pinnatifid way. 



XXX. Haloragacee (Myriophyllum). 



Leaves repeatedly forked lixiii. Ceratophyllaoeee. 



Leaves simple xxx. Haloragace(s (Hippuris). 



12 



