STNOPSIS OF THE NAITTKAL OEDBKS. XXXUl 



Leaves parallel-veined, persistent. Floral envelopes 

 whorled, or none 64 



Leaves parallel-veined, persistent. Floral envelopes 

 imbricate, bractlike 75 



63 Perianth inferior. Flowers perfect . .Ixxx. TrilliacecB. 

 Perianth superior. Flowers dicBcious. 



Ixxxi. DioscoreacecB. 



64 Ovaries several, each bearing a style or stigma 65 



Ovary 1, inferior 66 



Ovary 1, superior 69 



65 Perianth 4-parted, inconspicuous or none. 



xcv. PotamogetonaeecB. 

 Perianth 6-parted, conspicuous. Carpels not opening. 



Ixxxvi. AlismacecB. 



Perianth 6-parted, conspicuous. Carpels opening at 



their inner edge Ixxxix. Melanthacees. 



66 Stamens and style united in a central column. 



Ixxxiii. OrchidaeeiB. 

 Stamens free from the style 67 



67 Perianth wholly petal-like 68 



Three outer segments of perianth resembling an herba^ 



ceous calyx Ixxxii. Sydrocharidacem. 



All the 4 segments of perianth resembling an herba- 

 ceous calyx xl. Loranthacem. 



68 Stamens 3. Anthers bursting outwards. 



Ixxxiv. Iridaceee. 

 Stamens 6. Anthers bursting inwards. 



Ixxxv. Amaryllidaeeee. 



69 Perianth like a corolla of 6 petals. Flowers perfect . . 70 

 Perianth more or less glumaceous, or partly coloured, 



or wanting 71 



70 Perianth petal-like, conspicuous. Fruit dry, bursting 



with 3 valves Ixxxviii. Liliaoeee. 



Perianth petal-like, conspicuous. Fruit succulent, not 



bursting Ixxxvii. Asparagacea. 



Perianth herbaceous, scale-like. Fruit baccate, not 



bursting xciii. Aracem (Orontese). 



71. Flowers perfect. Perianth 6-parted. Stamens 6. 



xc. JuncacecB. 

 Flowers monoecious 72 



72 Flowers on a spadix 7.3 



Spadix wanting ■.■•■: '^^ 



Flowers solitary xcvi. Naiadaoeee. 



73 Flower on a thick spadix. Spath wanting. Anthers 



wedgeshaped, erect ; filaments long. 



xcii. Typhaoem. 

 65 



