Flowers dicious; twiners with alternate leaves.

MENISPERMACEae, 51

Flowers perfect; if climbers, the leaves opposite.

Leaves not peltate; petals deciduous. RANUNCULACEae, 34

Leaves peltate; petals persistent.

Brasenia, in NYMPHaeACEae, 55

Pistils several-lobed, the ovaries united below the middle.

RESEDACEae, 75

Pistils several, their ovaries cohering in a ring around an axis.

MALVACEae, 96

Pistils strictly one as to the ovary; the styles or stigmas may be several.

Leaves punctate under a lens with transparent dots. HYPERICACEae, 92

Leaves not punctate with transparent dots.

Ovary simple, 1-celled, 2-ovuled. ROSACEae, 150

Ovary simple, 1-celled, with one parietal many-ovuled placenta.

Leaves 2--3-ternately compound or dissected. RANUNCULACEae, 34

Leaves peltate, simply lobed. Podophyllum, in BERBERIDACEae, 52

Ovary compound, 1-celled, with a central placenta.

PORTULACACEae, 90

Ovary compound, 1-celled, with two or more parietal placentae.

Calyx caducous; juice milky or colored. PAPAVERACEae, 57

Calyx deciduous, of 4 sepals. CAPPARIDACEae, 74

Calyx persistent, of 3 or 5 sepals. CISTACEae, 76

Ovary compound, several-celled.

Calyx valvate in the bud, and

Persistent; stamens monadelphous; anthers 1-celled.

MALVACEae, 96

Deciduous; anthers 2-celled. TILIACEae, 101

Calyx imbricated in the bud, persistent.

Shrubs; stamens on the base of the petals. TERNSTRMIACEae, 95

Aquatic or marsh herbs; ovaries many,

On 5 placentae in the axis. SARRACENIACEae, 57

On the 8--30 part.i.tions. NYMPHaeACEae, 54

[2.] _Calyx more or less coherent with the surface of the (compound) ovary._

Ovary 8--30-celled; ovules many, on the part.i.tions; aquatic.

NYMPHaeACEae, 54

Ovary 10-celled; cells 1-ovuled. Amelanchier, in ROSACEae, 166

Ovary 2--5-celled.

Leaves alternate, with stipules. Pomeae, in ROSACEae, 151

Leaves opposite, without stipules. Some SAXIFRAGACEae, 168

Leaves alternate, without stipules. STYRACACEae, 333

Ovary 1-celled, with the ovules parietal.

Fleshy plants with no true foliage; petals many. CACTACEae, 186

Rough-leaved plants; petals 5 or 10. LOASACEae, 193

Ovary one-celled, with the ovules rising from the base.

PORTULACACEae, 90

[B.] _Stamens of the same number as the petals and opposite them._

Pistils 3--6, separate; flowers dicious; woody vines.

MENISPERMACEae, 51

Pistil only one.

Ovary one-celled; anthers opening by uplifted valves.

BERBERIDACEae, 52

Ovary one-celled; anthers not opening by uplifted valves.

Style and stigma one; ovules more than one. PRIMULACEae, 328

Style 1; stigmas 3; sepals 2; ovules several. PORTULACACEae, 90