KEY TO XATUEAL OEDEES. 



17 



Ovary compound, with many seeds from a ^^ge 

 central placenta. Portulacace^, 62 



Ovary compound, 1 -5-celled ; if 1-celled, with 

 2 - several placentae on the walls. 

 Sepals falling when the flower opens, 

 fewer than the petals. Herbs with 



milky or colored juice. Pa paver ace^ 40 



Sepals falling after blossoming, 5 in 



nuiuber. Trees. Tiliace^ 68 



Sepals remaining beneath the fruit. 



Leaves all opposite, with transparent 



Or dark-colored dots. Hypericace^, 54 



2. Stamens connected ivith the base of ihej)dals, and these borne on the receptacle. 



Filaments united in a tube or column; anthers 



kidney-shaped, 1-celled. Malvaceje, 63 



3. Stamens and petals united with and apparently borne on the calyx {perifjynons). 



Petals many, in several rows. Shrubs. Calycanthace^e, 135 



Leaves with stipules, alternate. Rosacea, 112 



Leaves without stipules. 

 Pod many-seeded. 



Shrubs, leaves opposite. Pod 

 with several cells. Philadel- 



[phus in SAXIFRAGACEiE, 143 

 Herbs; leaves fleshy. Pod 1- 



celled, opening by a lid. Portulacacejs, 62 



Pod 2-seeded, 2-beaked. Shrubs 

 or trees. 



Petals sometimes wanting. Hamamelace^ 144 



B. Stamens 10 or fewer. 



1. Corolla irregular. {Pistil one.) 



Leaves opposite, palmately compound. Calyx 5- 



toothed. Shrubs or trees. SAPiNDACEiE, 87 



Leaves alternate, with stipules. 



Filaments often united. Two lower petals 

 approaching or joined. Pod simple with 



only one row of seeds. Legtjminosje, 93 



Leaves alternate, without stipules. 



Flower 1-spurred. Stamens 8. Fruit of 3 



thick and closed pieces. Tropjeolace^ 73 



Flower somewhat papilionaceous. Stamens 

 4-8 in two sets; anthers 1-celled, 

 opening at top. Fruit a 2-celled, 2- 



seeded pod. Polygalace^e, 92 



