i ^ 



KEY TO THE FAMILIES 9 



Leaves without traces of stipules. 



Stamens 5. if only 3-4, not didynamous. 



Fruit a capsule or berry; ovary not 4-lobcd. 

 Styles or stigmas usually distinct. 



Parasitic twining plants, with scale- 

 like leaves. „^^ 



108. CUSCUTACEAE 677 



Plants not parasitic; leaves normal. 

 Inflorescence not scorpioid; flowers 



cymose or soUtary; ovary 2-3 



Corolla plaited and the plaits 

 convolute in the bud; flow- 

 ers axillary, solitary or 

 cymose-conglomeratc; plants 



usually twining. 



107. CONVOLVULACEAB 674 



Corolla merely convolute in the 

 bud, not plaited; flowers 

 cymose; plants never twin- 

 ing. 



109. POLEMOXIACEAE 679 



Inflorescence more or less dis- 

 tinctly scorpioid; ovary m 

 ours 1-celled or imperfectly 



2-celled. 

 Fruit a capsule. . ^^^ 



110. HYDROPHTLL.VCE.VE 699 



Fruit more or less drupaceous. 



111. EURETIACEAE 710 



Styles and stigmas wholly united. 



0\niles few. 109. Convolvtjlaceae 6/4 



0\afles numerous. 



Median axis of the gynoecmm in 

 the same plane as the axis of 

 the stem; seeds mostly pitted. 



116. SOLANACEAE 756 



Median axis of the gynoecium not 

 in the same plane as the axis of 

 the stem; seed tuberculate. 

 {Verbascum in) 



117. SCBOPHULARIACEAE 760 



Fruit of 1-4 nutlets; ovary more or less dis- 

 tinctly 4-lobed. . ^ , 1 , 

 Style or stigma furnished with a glandular 



ring. 112. Heliotropaceae 711 



Style or stigma not furnished with a 



glandular ring. 



Fruit 4 dry nutlets. 



113. Bor.\GTN-aceae 712 



Fruit more or less drupaceous. 



111. Ehretiaceae 71U 



Stamens 4 and didynamous, or 2 or 1. 



Stamens 2 and opposite to each other; coroUa 



regular. 101. Oleace.ve 655 



Stamens, if 2. not opposite to each other. 



nor the corolla regular. 

 Carpels ripening into 2 or 4 nutlets, an 



achene, or a drupe. 

 Style apical on the lobeless ovary. 



114. VERBENACEAE 739 



Style arising between the 4 lobes of 

 the ovary. 



115. LAMIACEAE ^41 



Carpels ripening into a capsule. 

 Placentae of the ovary axile. 



Ovary 2-celled. rarely 3-5-celled; 

 land-plants. • 



117. SCR0PHCL.4RLVCE.VE 760 



Ovary 1-celled : ours submerged 

 water plants or bog plants. 



118. Lentibulvriaceae 801 



Placentae of the ovary parietal. 



Herbs parasitic on the roots of 

 other plants; leaves scale-like, 



not green. -_.^ 



119. Orobanchaceae 802 



Herbs with green leaves, not para- 



Sitic. 120. M-VRTYNIACEAE 804 



