ANALYTICAL KEY. 14:0 



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



Leaves alternate; flowers not axillary Hydrophyllaceae, 80 



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



Style 2-cleft Hydrophyllaceas, 80 



Style 3-clef t, or stigmas 3 PolemoniaceaB, 75 



Style 2; leaves simple or none. 



Flowers solitary in the axils of small leaves ) ^ 



T71 T ^ 1 n^■r ■4.- J. i Convolvulaceae, 86 



Flowers clustered on nliform parasitic stems ) ' 



Flowers in naked cymose clusters; shrubs Hydrophyllaceae, 80 



* * * * Stamens fewer tlian the lobes of the slightly irregular corolla. 



Limosella or Veronica in Scrophulariaceae, 93 



2. FLOWERS IRREGULAR. Stamens with anthers 4 in pairs or 2; style 1; 

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



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



Ovary 2-celled Scrophulariaceae, 89 



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



Ovary 4-lobed; fruit splitting into 4 nutlets Verbenaceae, 102 



DIVISION 3. APETAL^. 



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



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



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



Leaves opposite; calyx inconspicuous; corolla tubular Caprifoliaceae, 64 



B, Ovary superior (free from the calyx). 



* Herbs; leaves alternate. 



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



Petaloid sepals deciduous; carpels several Ranuuculaceae, 16 



Sepals 4, green, deciduous; small pods 2-celled Cruciferas, 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, NyctaginaceaB, 104 



Stems erect; flowers axillary Glaux in PrimulaceaB, 73 



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



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



