ANAIiYTIOAL KEY. 14& 



Leaves alternate; twining vines; flowers funnelform, axillary ConvolvulacesB, 86 



Leaves alternate; flowers not axillary HydrophyllacesB, 80 



Leaves alternate; flowers in a head, with aoerose bracts Gilia, § 5, 78 



Style 2-cleft Hydrophyllaceaa, 80 



Style 3-cleft, or stigmas 3 Polemoniaoeae, 75 



Style 2; leaves simple or none. 

 Flowers solitary in the axils of small leaves ^ , , 



' j Convolvulaceae, 



Flowers clustered on filiform parasitic stems 



Flowers in naked cymose clusters; shrubs Hydrophyllaceae, 80 



* * * * Stamens /ewer than the lobes of tlie slightly irregular corolla. 

 Limoaella or Veronica in Scrophularlace^, 93 



2. FLOWERS IRREGULAR. Stamens with anthers 4 in pan-s or 2; style I; 

 leaves opposite or none, except in some of the Sorophulariaoese. 



Ovary 1-celled; corolla curved; leafless root parasites Orobanohaceae, 96 



Ovary 2-celled Scrophulariacese, 89 



Ovary 4 parted, forming in fruit 4 seedlike nutlets Labiatae, 97 



Ovary 4-lobed; fruit splitting into 4 nutlets Verbenaceae, 1 02 



DIVISION 3. APETAIlE. 



A. Ovary inferior (calyx adherent) or apparently so. 



Leaves cordate; calyx 3-lobed; capsule 6-celled Aristolochiaceae, 104 



Leaves opposite; calyx salver-form; ovary 1-seeded Wyctaginaceae, 104 



Leaves opposite; calyx inconspicuous; corolla tubular Caprifoliaceae, 64 



B. Ovary superior (free from the calyx). 



• Herts; leaves alternate, 



Petaloid calyx withering-persistent; akene 3-comered or flat Polygonaceae, 105 



Petaloid sepals deciduous; carpels several Ranunculacess, 16 



Sepals 4, green, deciduous; small pods 2-oeUed Crucifer^, 22 



Flowers asepalous in a spike, with a petaloid involucre Anemopsis, 106 



* * Herbs; leaves opposite, entire. 



Capsule 1-celled; style and stigma 1; leaves fleshy. 



Stems prostrate; flowers in involucrate heads. . . .'. Nyotaginaoeae, 104 



Stems erect; flowers axillary Olaux in Primulaceae, 73 



Capsule 1-celled; style or stigmas, 3 or more Caryophyllace^, 27 



Capsule 3-5-celled; flowers axillary Mollugo in Ficoideae, 63 



