SPRING FLORA OF MANHATTAN. 



Ovary 1. 



Inferior Santalnceae 16 



Superior but enclosed in calyx tube, calyx colored, 



Nyctaginaceae 20 

 Superior, not enclosed in calyx tube. 



Ovary 3-celled Euphorbiaceae 35 



Ovary 1 -celled. 



Stipules sheathing Polygonaceae 17 



Stipules none. 



Flowers closely imbricated with scarious bracts, 



Amarantaceoe 19 

 No scarious bracts. 



Flowers perfect; stigmis2. .Clienopodiaceae 18 

 Flowers monoecious or polygamous; stigma I, 



Urticaceae 15 

 Subclass II. Sympetalse. Calyx and corolla both present; petals 

 more or less united. 

 Ovary inferior. 



Fiowers in heads surrounded by an involucre 



Corollas all strap-shaped Cichorlaceae 64 



Corollas all or partly tubular . . Composilae 65 



Flowers not in he.ds. 



Leaves alternate Campanulaceae 63 



Leaves opposite; corolla 5-lobed Caprifoliaceae 62 



Leaves whorled ; corolla 4-lobed Rubiaceae 61 



Ovary superior. 



Stamens as many as lobes of corolla and opposite them. 



Primulaceae 48 

 Stamens if as many alternate with the lobes of corolla. 

 Corolla regular. 



Ovaries 2; herbs with milky juice. 



Stamens distinct Apocynaceae 50 



Stamens united with each other and the stigma, 



Asclepiadaceae 51 

 Ovary 1 . 



Deeply 4-lob< j d around the style Asperifoliae 55 



Not lobed. 



Leaves opposite,entire;ovary 3-celled. Pnlcmoniaceae 53 

 Leaves opposite, entire or toothed; ovary 2-celled. 



Scrophulariaceae 59 

 Leaves all radical; flowers in a close spike, 



Plantaginaceae 60 

 Leaves alternate, or if opposite, deeply parted, not all 

 radical 



Stamens 10 or more Leguminosae 31 



Stamens 5. 



Ovules not more than 4. 



Ovary 2 celled; leaves not lobed, 



(Jonvolndcteeae 52 



