lx INTRODUCTION. 
CLASS IX. ENNEANDRIA. 
Lauracee. Anthers opening by valves. Style 1. 
Echinodorus. Anthers opening lengthwise. Styles and ovaries many. 
CLASS X. DECAjVDRIA. 
Order Monogynia. Style or sessile stigma 1. 
* Corolla polypetalous, papilionaceous or irregular. 
Leguminose. Tribes 5 and 6. Pod l-celled, a legume. 
* * ^Corolla polypetalous or nearly so, regular. 
Decodon. Petals and stamens on the tube of the calyx. Pod 3-celled. 
Ericacee. Nos. 8, 14-19, 21, 22. Stamens hypogynous. Pod 2-5- 
celled. 
* * * Corolla monopetalous. 
Ericacee. Pod, or rarely berry, 3- 10-celled. 
Order Digynia. Styles or sessile stigmas 2. 
Silenee. Petals distinct from the tubular calyx, on long claws. 
Saxifragacee. Petals on the short calyx-tube. Pod 2-horned. 
Chrysosplenium. Petals none. Calyx-tube adherent to the pod. 
Scleranthus. Petals none. Calyx-tube constricted, inclosing the 
free utricle. 
Order Tri-Deeagynla. Styles or sessile stigmas 3-10. 
* Ovaries united into one, but the styles separate. 
-♦-Pod or berry'5- 10-celled. 
Phytolacca. Berry depressed, 10-celled, 10-seeded. Petals none. 
Penthorum. Pod 5-celled, 5-horned, many-seeded. Petals none. 
Oxalis. Pod 5-celled, the cells few-seeded. Petals conspicuous. 
-♦—•-Pod 1-celled, several - many-seeded from the base or axis. 
Caryophyllacee. Sepals 4-5, free from the valved pod. 
Portulaca. Sepals 2, adherent to the base of the pod, which opens 
by a lid. 
* * Ovaries (carpels) separate and distinct. 
Sedum. Pods, petals, and sepals equal in number, free and distinct. 
Spiree. Calyx 5-cleft or 5-toothed, bearing the petals and stamens. 
Zanthorhiza. Sepals and petals free and distinct: pods several. 
Isopyrum. Petals none. Sepals 5, petal-like, free and distinct. 
CLASS 11. DODECANDRIA. 
Order Monogynia. Style or sessile stigma 1. 
* Petals 4, irregular, on claws. 
Polanisia. Sepals 4. Pod veiny, 1-celled, 2-valved, many-seeded. 
* * Petals 5-9. 
Podophyllum. Sepals 6 — 9; the petals as many, deciduous. Berry 
1-celled. 
Hudsonia. Calyx 5-cleft. Pod 1-celled, 3-valved, few-seeded. Pc* 
tals fugacious. 
Portulaca. Calyx 2-parted. Pod 1-celled, opening by a lid. Petals 
fugacious. 
Lythrum. Calyx 6 — 7-toothed. Petals nearly equal. Pod 2-celled, 
many-seeded. 
Cuphea. Calyx tubular. Petals very unequal. Pod soon 1-celled, 
few-seeded. 
393 
460 
93 
133 
257 
257 
56 
147 
151 
65 
385 
147 
75 
55 
66 
146 
116 
14 
11 
42 
21 
48 
66 
132 
133 
