XVI ANALYTICAL KEY TO FAMILIES OF ANGtOSPERMS. 



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mmm Ovary 5 -celled; stamens 10. 



PENTHORACEAE (in CRASSULACEAE) 475 



mmmm Ovary lo-celled; stamens 10 PHYTOLACCACEAE 381 



ff Woody plants. 

 g Flowers in aments. 



h Perianth present, 4-5-lobed ...... MORACEAE (in URTICACEAE) 339 



hh Perianth wanting or a glandular disk. 



i Ovary-cells many-ovuled SALICACEAE 307 



ii Ovary-cells i-2-ovuled. 

 j Styles or stigmas 2. 



k Pistillate flowers solitary behind each bract MYRICACEAE 320 



kk Pistillate flowers 23 behind each bract. 



BETULACEAE (in CUPULIFERAE) 326 



jj Style or stigma i LEITNERIACEAE 322 



gg Flowers not in aments. 

 h Recurved or twining brier-like monocotyledons. 



SMILACEAE (in LILIACEAE) 275 

 hh Ordinary shrubs or trees; dicotyledons. 

 i Ovary 2-many-celled. 

 j Styles 1-2. 



k Ovules many in each cell. , CISTACEAE 630 



kk Ovules in each cell i or 2. 



/ Fruit a double samara ACERACEAE (in SAPINDACEAE) 607 



II Fruit a single samara or drupe OLEACEAE 723 



Jj Styles 3-4. 



h Ovules many in each cavity CISTACEAE 630 



kk Ovules 1-2 in each cavity. 



/ Flowers perfect, rarely polygamous RHAMNACEAE 61 1 



// Flowers monoecious or dioecious EUPHORBIACEAE 585 



ii Ovary i -celled. 



j Leaves and twigs peltate-scaly ELAEAGNACEAE 646 



jj Leaves and twigs not peltate scaly. 



k Ovules many in each cavity , CISTACEAE 630 



kk Ovules 1-2 in each cavity. 



/ Calyx-tube cylindric or urn-shaped, large THYMELEACEAE 645 



// Calyx-tube short or none, small. 



m Flowers yellowish, often showy LAURACEAE 435 



mm Flowers green. 



Plants usually with milky juice; flowers in pedunculate spikes 



or heads MORACEAE (in URTICACEAE) 339 



nn No milky juice; flowers in sessile heads or racemes. 



ULMACEAE (in URTICACEAE) 337 

 bb COROLLA POLYPETALOUS. 

 c HERBS. 

 ^Saprophytes, without chlorophyll... MONOTROPACEAE (in ERICACEAE) 695 



dd Epiphytes, on trees; lichen-like. BROMELIACEAE 238 



ddd Ordinary plants. 

 e Stamens perigynous. 

 / Anthers usually long and curved, opening by terminal pores. 



MELASTOMACEAE 650 

 ff Anthers opening longitudinally. 

 g Calyx with a fringed crown in the throat; vines; stamens 5. 



PASSIFLORACEAE 641 

 gg Calyx-throat naked. 

 h Plants fleshy; ovules many; scale at base of each carpel. 



CRASSULACEAE 473 

 hh Plants not fleshy; no scales on the receptacle. 



* Sepals 2 PORTULACACEAE 384 



ii Sepals 5, or calyx 5-lobed. 

 j Ovules many. 



