4 SPRING FLORA OF MANHATTAN. 



Compound 



Stamens as many as petals and alternate. 



Herbs, ttowers irregular Violaceae 44 



Woody plants. 



Leaves simple Celastracme 37 



Leavfs compound. 



Ovary 1-celled Anacardiaceae 36 



Ovary 3-celled Staphyleaceae 38 



Stamens more numerous than petals, or only 2. 

 Flowers irregular. 



Sepals 2; petals 4; stamens 6 Papaveraceae 25 



Petals 4; stamens usually 7 Hippocastanacene 40 



Flowers regular. 



Stamens 10; petals •>. 

 Ovary .')-cel led. 



Leaves simple Geraniaceae 32 



Leaves 3-foliate Qjalidaceae 33 



Ovary 1-celled (Jdi-yopliyllaceae 21 



Stamens .6 (or 2); petals 4. 



Ovary 1-celled . . Copparidaceae 27 



Ovary 2-celled Crudferae 20 



B. Ovary inferior. 

 Shrubs. 



Leaves opposite; petals 4 Cornaceae 47 



Leaves alternate; petals 5 Snxifrdijaceae 28 



Herbs. 



Petals 4 Oenotlieraceae 45 



Petals 5; flowers in umbels L^mbelUferae 4fi 



II. Corolla and sometimes calyx absent. 

 Flowers unisexual; one or both sorts in catkins or heads; trees or shrubs. 

 Staminate flowers in catkins; pistillate single. 



Leaves simple Fagocear. 12 



Leaves pinnate J\Hjhindace(ie 9 



Both kinds in catkins or heads. 



Ovary 2-ovuled; anthers 1-celled Betulaveae 11 



Ovary 1-ovuled; flowers in heads Platanaceae 29 



Ovary 1-2-ovuled; flowers in short catkins; anthers 2 celled, 



Moraceae 14 



Ovary, many ovuled Salicaceae 10 



Flowers not in catkins. 

 Trees or shrubs. 

 Ovary not lobed. 



Leaves simple Ulmaceae 13 



Leaves pinnate Oleacme 49 



Ovary 2-lobed Aceracene 39 



Ovary 3-5-lobed; leaves pinnate Rutacene 34 



Herbs. 



Ovaries several lianunculacene 23 



