ANALYTICAL KEY. XV 



B. Flowers unisexual, at least the staminafe in aments. Trees or $krubs witk 



alternate Icaccs. 

 Monoecious : male flowers in aments ; female solitary or few : 

 ovary inferior : leaves simple, with caducous stipules. 

 Anthers 2-celled : nut in a cup-like or spiny invctlucre. Cupdlifer.«, 74 

 Anther cells oeparate : nut in a foliaceous or tul»ular invo- 

 lucre Corylus in Cui'lliflu^, 74 



Monoecious or dioecious, flowers all in aments : ovary suj)erior. 

 Fruit a 1-seeded nutlet: In-acts thickened and ri<^id in fruit: 



nut winged or angled. . . . Betulea?, in Ccpulifer.«, 74 



Fruit a many-seeded capsule : diaxious : bracts herbaceous : 



seeds coniose. SAHCACKiE, 75 



Subclass II. MONOCOTYLEDONS. Embryo with a single 

 cotyledon. Leaves mostly parallcl-veiued. Flowers usually 3-merous, 

 never in fives. Mostly herbaceous. 



A. Ovari/ inferior: perianth conspicnous, colored : teirestrial : Jloxoers perfect. 

 Flowers irregular : stamens and style coherent ; anthers 1 or 2 : 



leaves alternate, sheathing Orciiidace.i:, 76 



Flowers regular: stamens 3, perigynous : leaves cquitant. . Ikidace.*, 77 

 Flowers regular : stamens 6, perigynous : leaves not ecjuitant. 



Amaryllidace^, 78 



B. Ovarij superior or nearhj so: perianth regular or none. 

 Carpels united into a compound ovary : perianth corolla-like, 

 rarely partly herbaceous : terrestrial plants. 

 Woody climber, with tendrils: anthers 1 -celled. . . Smilacej:, 60 



Herbs : anthers 2-celled. 

 Perianth mostly of similarly colored lobes or divisions : 



stems from a bulb, corm, or rhizome. . . . Liliace.e, 79 

 Perianth of 3 green sepals, and 3 ephemeral deliquescent 



petals : stems from fil)rous roots. . . Commelix-^cejs, 81 



Carpels distinct or solitary : aquatic or mar.=h herbs. 



Perianth none : seed albuminous: fruit utricular or nut-like. 

 Flowers monoecious in heads or on a crowded spadix : 



leaves linear. Trrii ape.*. 83 



Small floating disk-like plants. .... Lem.nacl.e, 84 



Perianth herbaceous, petaloid, or none : albumen none. 



Carpels few : perianth none or in fertile flowers herbaceous. 



NAIADACE.E, 86 



Carpels numerous in a whorl or head : 3 sepals herbaceous, 



3 petal)id. Alismace^, 85 



Perianth of 6 similar glumaceous segments : capsule 3-valved. 



Rushes or serlge-like Juncaceje, 82 



Flowers in the axils of scales or glumes, spicate, without evi- 

 dent perianth. Stems solid : sheaths closed : scales single : 

 anthers basifixed Cvpebaceje, 87 



Culms hollow, terete : .'^heaths split : ghnnes in pairs : anthers 



versatile. (;hamine.c. 8« 



