KEY TO XATCEAL ORDERS. 



17 



Ovary compound, with manj seeds from a ^-^^^ 

 central placenta. Portulacace^, 62 



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

 2 - several placentae on the walls. 

 Sepals falHng when the flower opens, 

 fewer than the petaLs. Herbs with 



milky or colored juice. Papa verace^, 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. Htpericace^, 54 



2. Stamens connected icith the base of the petals^ and these borne on the receptacle. 



Filaments united in a tube or column; anthers 

 kidney-shaped, 1-celled. Malyacej-:, 63 



3. Stamens and petals united iciik and apparently home on the calyx {periyynous) 



Petals many, in several rows. Shrubs. Caltcanthace^, 135 



Leaves with stipules, alternate. Rosacea, 112 



Leaves without stipules. 

 Pod many-seeded. 



Shrubs, leaves opposite. Pod 

 with several cells. Philadel- 



[phus in Saxifragace^, 143 

 Herbs; leaves fleshy. Pod 1- 



celled, opening by a hd. Portulacace^, 62 



Pod 2-seeded, 2-beaked. Shrubs 

 or trees. 



Petals sometimes wantmg. HAMAiiELACE-E, 144 



B. Stamens 10 or fewer. 



1. Corolla irregular. (Pistil one.) 



Leaves opposite, palraately compound. Calyx 5- 



toothed. Shrabs or trees. Sapixdace^, 87 



Leaves alternate, with stipules. 



Filaments often united. Two lower petals 

 approaching or joined. Pod simple with 



only one row of seeds. Leguminos^, 93 



Leaves alternate, without stipules. 



Flower 1-spurred. Stamens 8. Fruit of 3 



thick and closed pieces. Trop^OLACE^, 73 



Flower somewhat papihonaceous. Stamens 

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

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



seeded pod. ' Poltgalace.e, 93 



