FAMILY KEY 27 



Q. Petals 5, yellow; sepals 5. CRASSULACEAE (p. 117) 



QQ. Petals usually not 5, white; sepals usually not 5. 



PORTULACACEAE (p. 86) 



PP. Leaves not fleshy. 



R. Flowers axillary; stem 5-angled. Lythrum in LYTHRACEAE (p. 156) 

 RR. Flowers in clusters; stem terete. 

 S. Stamens 5, on the receptacle; ovules 2 in each cell. 



LINACEAE (p. 144) 

 SS. Stamens 10, on the calyx; ovules numerous. 



Saxifraga in SAXIFRAGACEAE (p. 118) 

 KK. Flowers irregular. 



T. Flowers spurred at base. VIOLACEAE (p. 153) 



TT. Flowers not spurred at base. 

 U. Leaves entire; petals 3; stamens 6-8; stigmas 1-2; style i; carpels 2. 



POLYGALACEAE (p. 145) 



UU. Leaves serrate; petals 2 or 4; stamens 5; stigmas 5, sessile; carpels 5. 



BALSAMINACEAE (p. 148) 

 II. Ovary inferior. 



V. Flowers in umbels or heads. UMBELLACEAE (p. 163) 



VV. Flowers neither in umbels nor in heads. 

 W. Stem 5-angled; sepals and petals usually 6; flowers axillary. 



Lythrum in LYTHRACEAE (p. 156) 



WW. Stem terete; sepals and petals fewer; flowers usually clustered. 

 X. Sepals 4; petals 4; stamens 2 or 4 or 8; style i; stigmas i or 4. 



ONAGRACEAE (p. 156) 

 XX. Sepals 5; petals 5; stamens 10; styles or sessile stigmas 2-4. 



Saxifraga in SAXIFRAGACEAE (p. 118) 



GROUP 19 Dicotyledonous herbs with alternate simple 

 leaves and sympetalous flowers 



A. Ovary superior or mainly so. 

 B. Corolla irregular. 



C. Leaves with stipules; corolla not 2-lipped; stamens 10. LEGUMINACEAE (p. 135) 

 CC. Leaves without stipules; stamens 5 or fewer. 



D. Leaves all basal, on upper side greasy to touch; corolla spurred at base, 



2-lipped; stamens 2. Pinguicula in PINGUICULACEAE (p. 210) 



DD. Leaves not all basal, not greasy to the touch; corolla not spurred; stamens 



2 or 4 or 5. 



E. Corolla 2-lipped; ovary i-2-celled. SCROPHULARIACEAE (p. 198) 



EE. Corolla not 2-lipped; ovary s-celled. BALSAMINACEAE (p. 148) 



BB. Corolla regular or very nearly so. 



F. Plants twining; leaves none or scattered. CONVOLVULACEAE (p. 182) 



FF. Plants not twining; leaves reniform, palmately veined, crenate, all basal. 



Nephrophyttidium'm MENYANTHACEAE (,p. 180) 

 FFF. Plants not twining; leaves not reniform, not palmately veined, rarely 



crenate or all basal. 



G. Leaves fleshy-linear, 2.5-7.5 cm. long, all basal; flowers in dense heads; 

 plants not far from the seashore. PLUMBAGINACEAE (p. 178) 



