i KEY TO THE ORDERS 



Leave* represented by appressed whorled scales : steins or branches loosely 

 jointed. Order CAST ABIN ALES. 



Leaves not appressed scales : stems or branches not loosely jointed. 

 Fruit 1 seeded: seeds without tufts of hairs. 



Pistillate flowers without a calyx: ovule erect and orthotropous. 



Order MTRICALXS. 



Pistillate flowers with a calyx : ovule pendulous and anatropous. 

 Leaf-blades simple. Oleaceae in Order OLEALES. 



Leaf-blades compound : fruit a samara. 



Oleaceae In Order OI.EAI.ES. 



Fruit many-seeded : seeds each with a tuft of hairs. Order SALICALES. 

 Calyx present at least in the stamlnate or In the perfect flowers. 



Leaves represented by appressed wborled scales : branches loosely jointed. 



Order CASUABINALES. 

 Leaves not appressed scales: branches not loosely jointed. 



Flowers, at least the stamlnate. in amenta, or ament-llke spikes. 



Pistillate flowers separate at maturity : fruit a nut or nn achene. 



Order FAOALBS. 

 Pistillate flowers forming aggregate fruits: fruit drupe-like. 



Artocarpuceae in order UKI-ICALES. 

 Flowers, at least the staminate, not In aments. 

 a. Ovary superior. 



Gynoeciura of 1 or several and distinct carpels : stigma and style 



solitary. 

 Carpel solitary. 



.Style lateral and ol.ll.m-. 



IVtlveriaceae in Onl.-r CHUKVODSAIM, 

 Style axlle, erect. 



Ovary neither enclosed nor seated in a hypanthlum or a 



calyx-tube. I'rtlcaceae In Order UKTICALXS. 



Ovary enclosed in or seated in a hypanthlum or a calyx- 



tube. 

 Stamens borne under the gynoeclum. 



Allionlaceae in Order CHEXOPODIALES. 

 Stamens borne on the hypanthlum or adnate i tin- 

 calyx-tube. Order TUYMELEALES. 



Carpels several. 



stiuii.-n- Inserted below the ovary. 



Families In Order RANAI.KS. 



Stamens Inserted on the edge of a cup-shaped hypanthlum. 



Rosaceae In Order ROSALES. 



Oynoeclum of 2 or several united carpels : stigmas or styles 2 or 



Ovary, by abortion. 1-celled and 1-ovuled. 

 Leaves with sheathing stipules (ocreae). 



llriliT POLYOONALEB. 



Leaves estlpulate, or if stipules are present they are not 



sheathing. 

 Trees or shrubs. 



. 



Anthers opening by silts : ovary not seated In a 

 hypanthlum. 1'lmaceae In Order URTICAUDB. 



Anthers opening by hinged valves : ovary seated In 

 an accrescent bypnnthulm. 



Lauraceae In Order TIIYMEI.EAI.ES. 

 Herbs or vines. 



Leaves with stipules. 



Families In Order CHEXOPODIAKEX. 

 Leaves without stipules. 



Stigmas entire. Order 'HI :M>I-<>PI.M.F.S. 



Stigmas 2-.-l.-n. 



Kuphorblaceae In Order BUFBOBBXAIM. 

 Ovary several-celled, or with several placentae, several- 



ovuled. 



Stamens hypogynous. Inserted under the gynoeclum In the 

 perfect flowers, not on a disk In the pistillate flowers. 

 ii. rta 



Flowers perfect. 



Ovary several-celled. 



Families In Order CHBMOPODtALM. 

 Ovary 1-2 celled. 



Stamens not tetradynamous. 4-8; ovary 

 1-celled. Order riiENoropiAUts. 



Stamens tetradynamou- "lied. 



Brasslcaceae In Order PAPAVERAIJCS. 

 Flowers monoeclouM or <li 



Euphorblacea* In Order ErrtiouiALEB. 



