Ixiv INTRODUCTION. 
7 Corolla regular, the petals equal and similar to each other , rao 
Corolla irregular . afceed 
Ovary inferior or adherent, below the insertion ‘of the covet «tbl 
Ovary superior or free, within the tube or base of the corolla . 57 
Polypetals with several free, distinct ovaries or carpels. 
Stamens united in a ring or column enclosing the rp 
9 Ovaries in aring round the axis . 10 
Stamens free. Ovaries quite free, each with a distinct style or 
stigma, without a central axis : =~) aS 
10 ee 5 or 10, shortly united at the base GERANIACEAE (p. 88). 
Stamens indefinite, united inacolumn . MALVACEAE (p. 84). 
Stamens definite in number A many, twice, or thrice as many 
Ti+ asthe petals) . ‘ : é , , . te 
Stamens indefinite (many o: or rar ely few) A ree 
Leaves fleshy. Sepals and petals 4 or more CRASSULACEA (p. 158). 
124 Aquatic plants not fleshy. Sepals and petals 3 each. 
ALISMACEZ (p. 4380). 
f Leaves without stipules. Stamens inserted on the receptacle 14 
y \ Leaves with stipules. Stamenson the calyx ROSACEZ (p. 127). 
14 Sepals or petals or both 4or more . RANUNCULACEZ (p. 1). 
Sepals and petals 3 each . ; : .| ALISMACEZ (p. 485). 
Regular Polypetals with one free, simple, or compound ovary. 
15 More than 10 stamens : rs : P ‘ ; ; one 
10 stamens or fewer . : : ; , ae 
Calyx of 2 distinct sepals. Petals 4. PAPAVERACEAS ( (p--Fh) 
Calyx of one piece, with 5 or more teeth. Petals 5 or 6. 
Stamens about 12 . ; ; : : : » 
Calyx of 3 to 5 sepals or lobes. ‘Petals 5. Stamens numerous 18 
Calyxofseveralsepals. Petalsandstamens numerous, Aquatic 
plants. : : . NYMPH ACE (p. 16), 
Petals distinct. Ovary sessile . : . LYTHRUM (p. 155). 
174 Apparent petals really appendeees to the involucre. Ovary ap- 
parently stalked . .  KUPHORBIA = rie 
18 Leaves opposite . ; . ; 
Leaves alternate . * 
f Sepals 3, with or without 2 small outer ones. Style simple 
19 CISTACEZ (p. 51). 
( Sepals 5, nearly equal. Styles3or5, distinct. HYyPERICINEZ (p. 79). 
Trees or shrubs. Stamens free . ‘ : 2 ah ak 
90 Herbs. Stamens free AcT aA (p. 14). 
Herbs or undershrubs. Stamens united ina column round the 
pistil : : ‘ MALVACEZ (p, 84). 
[ Petals and stamens inserted on ‘the receptacle. Flower-stalk 
91! Winged by an oblong bract . TILIACE® (p. 87). 
Petals and stamens inserted on the ‘calyx. Flower-stalk not 
winged . 2 ; ; ; ‘ ‘ . ROSACEA (p. 127). 
i 
