ANALYTICAL KEY TO FAMILIES OF ANGIOSPERMS. XX i 



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ff Flowers ordinary, petaloid. 



g Grass-like monocots; flowers in involucrate heads ERIOCAULACEAE 236 



gg Not grass -like; flowers not as above. 



h Stamens 4-5, equal; corolla regular LOGANIACEAE 726 



hh Stamens 4, didynamous or 2 ; corolla often irregular. 



* Ovules i in each of the 4 cavities VERBENACEAE 776 



ii Ovules 2-many in each of the 2 cavities. 



j Capsule with elastic valves ACANTHACEAE 853 



jj Capsule without elastic valves SCROPHULARIACEAE 818 



dd Woody plants; leaves opposite. 

 e Ovules 1-2 in each cell. 



f Stamens 2 OLEACEAE 723 



ff Stamens didynamous (very rarely 2) VERBENACEAE 776 



ee Ovules many in each cell. 



/ Placentae parietal BIGNONIACEAE 850 



ff Placentae axial SCROPHULARIACEAE 818 



cc STAMENS 5 (RARELY 6) 



d Ovaries 2, distinct or nearly so; juice usually milky; seeds frequently 

 with hairy appendages. 



e Filaments distinct ^ APOCYNACEAE 737 



ee Filaments monadelphous; corolla with a crown ASCLEPIADACEAE 740 



dd Ovary one; seeds not appendaged. 



e Ovary deeply 4-lobed BORAGINACEAE 766 



ee Ovary not 4-lobed. 

 f Ovary i -celled. 

 g Leaves 3-foliolate, or floating and orbicular. 



MENYANTHACEAE (in GENTIANACEAE) 736 



gg Leaves dentate, cleft, or pinnately compound HYDROPHYLLACEAE 762 



ggg Leaves entire or nearly so, not as above. 

 h Stamens opposite the lobes of the corolla; placenta free-axial. 



* Ovule i PLANTAGINACEAE 856 



ii Ovules many PRIMULACEAE 713 



hh Stamens alternate with the lobes of the corolla; placentae parietal. 



* Leaves opposite; ovules many GENTIANACEAE 728 



ii Leaves alternate; ovules 3-5 CONVOLVULACEAE 749 



ff Ovary 2-5 celled. 

 g Parasitic climbers, without chlorophyll 



CUSCUTACEAE (in CONVOLVULACEAE) 754 

 gg Not parasitic, green. 

 h Leaves alternate. 

 Herbs. 



J Ovary 3-celled; styles or stigmas 3. 

 k Stamens inserted in sinuses of the corolla; or monadelphous. 



DlAPENSIACEAE 712 



kk Stamens inserted on the corolla-tube, free . . POLEMONIACEAE 756 



jj Ovary 2 -celled or 4-called, or if 3-celled, plant twining; styles or 



stigmas i or 2. 



k Corolla plicate; stamens often centrally connivent . . SOLANACEAE 8oS 

 kk Corolla not plicate; stamens not conspicuously connivent. 

 / Ovules numerous. 



m Style and stigma i SCROPHULARIACEAE 818 



mm Styles 2 HYDROPHYLLACEAE 762 



// Ovules i or 2 in each cell. 



m Fruit a pod CONVOLVULACEAE 749 



mm Fruit of 2-4 nutlets BORAGINACEAE 766 



ii Woody plants. 



j Stamens opposite the lobes of the corolla; ovules i in each cell; 



corolla appendaged within SAPOTACEAE 720 



jy Stamens alternate with the lobes; ovules many. 

 k Stamens on the corolla. 



