KEY TO NATURAL ORDERS. 17 



Ovary compound, with many seeds from a PAGE - 



central placenta. PORTULACACEJE, 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. PAPAVERACE^B, 40 



Sepals falling after blossoming, 5 in 



number. Trees. TILIACE.&. 68 



Sepals remaining beneath the fruit. 



Leaves all opposite, with transparent 



or dark-colored dots. HYPERICACE^;, 54 



2. Stamens connected with the base of the petals, and these borne an the receptacle. 



Filaments united in a tube or column; anthers 

 kidney-shaped, 1-celled. MALVACEAE, 63 



3. Stamens and petals united with and apparently borne on the calyx (perigynom). 



Petals many, in several rows. Shrubs. CALYCANTHACEJE, 135 



Leaves with stipules, alternate. ROSACES, 1 12 



Leaves without stipules. 

 Pod many-seeded. 



Shrubs, leaves opposite. Pod 

 with several cells. Philadel- 



[phus in SAXIFRAGACE^E, 143 

 Herbs; leaves fleshy. Pod 1- 



celled, opening by a lid. PORTULACACEJE, 62 



Pod 2-seeded, 2-beaked. Shrubs 



or trees. 

 Petals sometimes wanting. HAMAMELACE^E, 144 



B. STAMENS 10 OR FEWER. 



1. Corolla irregular. (Pistil one.) 



Leaves opposite, palmately compound. Calyx 5- 



toothed. Shrubs or trees. SAPINDACE.E, 87 



Leaves alternate, with stipules. 



Filaments often united. Two lower petals 

 approaching or joined. Pod simple with 



only one row of seeds. LEGUMINOS^E, 93 



Leaves alternate, without stipules. 



Flower 1- spurred. Stamens 8. Fruit of 3 



thick and closed pieces. TROP.EOLACE.E, 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 



