ANALYTICAL KEY. 
Leaves alternate; twining vines; flowers funnelform, axillary. ....Convolvulacee, 
Leaves alternate; flowers not axillary...... 0... ...ceeeeceeeeee Hydrophyllacee, 
Leaves alternate; flowers in a head, with acerose bracts.......... ...+-- Gilia, § 5, 
Style Q-cleits ¢ 5.5. <2 ave din vad indsurnaainduniwosa- oveee Hydrophyllacee, 
Style 3-cleft, or stigmas 3...... 6.2... ccc. ca eeeee ceveeces Polemoniacee, 
Style 2; leaves simple or none, 
Flowers soli in the axils of small leaves........ 2.2... weirs) 
Flowers yen on filiform parasitic stems...... 0.0... ..2005 Cpnve ae 
Flowers in naked cymose clusters; shrubs..........0. coeees ..Hydrophyllacee, 
"** * Stamens fewer than the lobes of the slightly irregular corolla, 
Limosella or Veronica in..........20 eens st sup dudasl pestuclaanauar@iee’s .Scrophulariacee, 
14¢ 
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2. FLOWERS IRREGULAR. Stamens with anthers 4 in pairs or 2; style 1; 
leaves opposite or none, except in some of tie Scrophulariacez. 
Ovary 1-celled; corolla curved; leafless root parasites............ Orobanchaceez, 
Ovary 2-celled ........ os ib adva aianavovel eeaie uleucliee we ielacntease o iageeeasowiae Scrophulariacee, 
Ovary 4 parted, forming in fruit 4 seedlike nutlets............. ...00005 Labiate, 
Ovary 4-lobed; fruit splitting into 4 nutlets......... oO Beeseeetewiies Verbenacee, 
DIVISION 3. APETALZ. 
A. Ovary inferior (calyx adherent) or apparently so. 
Leaves cordate; calyx 3-lobed; capsule 6-celled....... ........ Aristolochiacez, 
Leaves opposite; calyx salver-form; ovary l-seeded..... 2 Sabedais Wyctaginacee, 
Leaves opposite; calyx inconspicuous; corolla tubular.... ........Caprifoliacez, 
B. Ovary superior (free from the calyx). 
* Ilerbs; leaves alternate, 
Petaloid calyx withering-persistent; akene 3-cornered or flat........Polygonacez, 
Petaloid sepals deciduous; carpels several.......... cee eeeeeees Ranunculacee, 
Sepals 4, green, deciduous; small pods 2-celled...... ........2....0006 Crucifere, 
Flowers asepalous in a spike, with a petaloid involucre...... sivisietaceieise Anemopsis, 
** Herbs; leaves opposite, entire. 
Capsule l-celled; style and stigma 1; leaves fleshy. 
Stems prostrate; flowers in involucrate heads.............. Nyctaginacee, 
Stems erect; flowers axillary............--+eeeee .-Glauz in Primulacee, 
Capsule l-celled; style or stigmas, 3 or more...... eeveeeeeeee..Caryophyllacee, 
Capsule 3-5-celled; flowers axillary. ....... owiwe sie -..-.Mollugo in Picoidez, 
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