SPRING FLORA OF MANHATTAN. o 



Ovary 1 . 



Inferior Santalaceae 16 



Superior but enclosed in calyx tube,calyx colored, 



Nyctaginaceae 20 

 Superior, not enclosed in calyx tube. 



Ovary 3- celled Euphorhinceae 8.5 



Ovary 1 -celled. 



Stipules sheathing Folygonaceae 17 



Stipules none. 



Flowers closely imbricated with scarious bracts, 



Amarantaceae 19 

 Xo scarious bracts. 



Flowers perfect; stigmas 2. . Chenopodi aceae 18 

 Flowers monoecious or polygamous; stigma 1 , 



Urticaceae 15 

 Subclass II. Sympetalas. Calyx and corolla both present: petals 

 more or less united. 

 Ovary inferior. 



Flowers in heads surrounded bv an involucre 



Corollas all strap-shaped Cichorlaceae 64 



Corollas all or parlly tubular Compositae 65 



Flowers not in heads. 



Leaves alternate Campanulaceae 63 



Leaves opposite; corolla -S-lobed Caprifoliaceae 62 



Leaves whorled; corolla 4-lobed Rubiaceae 61 



Ovary superior. 



Stamens as many as lobes of corolla and opposite them. 



Primulnceae 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-lobPd around the style AsperifoUae 55 



Not lobed. 



Leaves opposite, entire;ovary 3-cel\ed. Polemoniaceae 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, 



Convolvulacene 52 



