CONTENTS. XI 



XXXV. THE MOUSE-EAR EVERLASTING Antennaria. Stolons. 

 Dioscious plants. Heads of florets. Receptacle. In- 

 volucre. Pappus clubby. Cypsela 137 



XXXVI. ROBIN'S PLANTAIN Erigeron. Heads radiate. Florets 



of the ray. Florets of the disk. Ligulate corolla. . 140 



XXXVII. THE DANDELION Taraxacum. Runcinate leaves. Ra- 



diant, homogamous heads. Chaff. Syngenecious 

 anthers. The order COMPOSITE. Chickory, Camo- 

 mile, Aster. Chrysanthemum. Solidago 143 



XXXVIII. THE CHECK ERBERRY Gaultheria. Urceolate corolla. 



Curious fruit. The Black Checkerberry 147 



XXXIX. THE PYROLAS. Anthers inverted in bud ; opening by 



pores. The six species 150 



XL. PRINCE'S PINE Chimaphila. Horned anthers 152 



XLI. THE KALMIAS. Elastic stamens. Pollenization. The 

 order ERICACEAE. The Heaths. Blueberries. Cranber- 

 ries. Azalias. May-flower 155 



XLII. THE PITCHER PLANT Sarracenia. Ascidia. Order SAR- 



RACENIACE.E. Carnivorous Plants. Venus' Flytrap .. 158 

 XLIII. THE AMERICAN COWSLIP Dodecatheon. Opposing 



stamens. Dimorphism. Free central placenta 161 



XLIV. CHICK WINTERGREEN Trientalis. 7-parted flowers ... 164 

 XLV. THE LOOSESTRIFES Lysimachi a. Verticillate leaves. 

 Monadelphous stamens. Opposing stamens explained. 

 Order PRIMULACE^S. Cyclamen. Anagallis. Primrose. 165 

 XLVI. THE SPEEDWELLS Veronica. Why so called. A two- 

 celled capsule. Exserted stamens. The species 170 



XLVII. TOAD FLAX Linaria. Pentamerous flowers. Personate 

 corolla. The spur, what can reach its honey. Order 



SCROPHULACE^E. Digitalis. Pentstemon 173 



XLVIII. THE GROUND IVY Nepeta. Naturalized plants. Bi- 

 labiate corolla. Halved anthers. Seeds apparently 



naked. The Catmint 176 



XLIX. BLUE CURLS Brunella. Cuspidate bracts. Hairs jointed. 

 The lip a doorstep for bees. Order LABIATE. Pep- 

 permint. Oil of Spike. Lavender 1 79 



L. THE MORNING GLORY Ipomcea. Ephemeral flowers. 

 Supervolute estivation. The disk. Use of pollen ; 

 nectar. Septifragal dehiscence. Albumen. Vital- 

 ity of seed. The bud. CONVOLVULACE.E 182 



LI. ROCK MAPLE Acer. Tree picturesque. Theory of leaf - 



forms. Autumnal colors. Maple sugar. Other Maples. 188 

 LII. THE HORSE CHESTNUT ^Esculus. History. Phyllo- 

 taxy. Digitate leaves. Suppression of ovules. The 



SAPINDACE.E. The Soapberry tree 192 



LIII. THE SILK GRASS Asclepias. Pollinia. Corona, hoods 

 and horns. Cross-fertilization. The ASCLEPIADACE^E. 

 The Cow tree. Carrion flower 195 



