LINN^AN CLASS VII., Vni. 1^9 



Order XIL— POLYGYNIA. 



Alis-ina. Sepals 8, persistent. Petals 3. Ovaries numerous. Cap- 

 eules numerous, distinct, 1-seeded. Alismacece, 137. 



CLASS VIL—HEPTANDRIA. 

 Order L— MONOGYNIA. 



uEsculus. Sepals united, forming a 4 — 5-toothed tubular calyx. 

 Petals 4 — 5, more or less imequal. Stamens 6 — 8, usually 7. (Buck- 

 eye.) HippocastanacecB, 39. 



Order IV.— TETRAGYNIA. 



Saururus. Flowers naked, seated on a scale. Anthers cuneate. 

 Fruit consisting of 4 indehiscent nuts. Saururacecc, 114. 



CLASS VIIL— OCTANDRIA. 



Order I.— MOXOGYNIA. 



a. Flowers superior. 



Rhexia. Calyx, with the tube ventricose — ovate at the base, nar- 

 rowed at the apex. Limb 4-cleft. Petals 4, obovate. Capsule 4-celled. 

 MelastomacecB, 46. 



(Enothera. Calyx tubular, 4-cleft, 4-sided. Petals 4, obovate. 

 Stigmas 4-lobed. Capsule 4-valved, many-seeded. Onagracece, 50. 



Gaura. Calyx 4-cleft, tubular, prolonged beyond the ovary. Petals 

 4, unguiculate. Fruit 1-celIed, 1-seeded by abortion, somewhat ligne- 

 ous. Ona grace ce, 50. 



Epilobium. Calyx eampanulate. Segments 4, spreading. Petals 

 4. Stamens 8, alternate ones largest. Stigma clavate. Capsule 4- 

 angled, 4-celled. Onagracece, 50. 



Oxj/coccus. Calyx 4-cleft. Corolla with 4 linear segments. Antliers 

 tubular, 2-parted. Fruit a berry, many-seeded. (Cranberry.) Vac- 

 ciniacece, 71. 



6. Flowers inferior. 



Menziesia. Calyx 4-cleft. Corolla globose, 4 — 5-cleft. Capsule 4- 

 celled. Seeds numerous, oblong. (Shrubs.) Ericacecc, 72. 



Acer. Calyx 4 — 5-cleft. Stamens varying from 5 — 10. Fruit a sa- 

 mara, by abortion, 1-seeded. (Trees.) Aceracea; 38. 



Dirca. Perianth tubular, colored, eampanulate. Stamens unequal. 

 Fruit a drupe, l-seeded. (Shrubs with tough bark.) lliymeliacece, 104. 



Jeffersonia. Sepals 4 — 5, fugaceous, colored. Petals 8, linear, ob- 

 long. Capsule 1-celled, opening by a slit near the summit; many- 

 seeded. Berberidacece, 6. 



Elliottia. Calyx 4-toothed. Corolla deeply 4-parted. Filaments 

 glandular. Anthers sagittate. Ovary 4-celled, many-seeded. Erica- 

 ceae^ 72. 



Amyris, Calyx 4-toothed, persistent. Petals 4, cuneate, having 

 claws. Stamens shorter than the petals. Fruit 1-seeded. Amyrida- 

 cece, 81. 



