SYSTEMATIC BOTANY. 



71. Thymeleaceae. Flowers in close clusters; ovary with I pen- 

 dulous ovule in each cell. Shrubs or trees with tough bark. 286. 



72. Santalaceae. Ovary inferior, i-celled, 1-3 ovules on a free 

 central placenta. Usually parasitic. 286. 



Apetalous Exogens with Imperfect Flowers. 



73. Euphorbiaceae. Ovary usually 3-celled, with 1-2 seeds hang- 

 ing in each cell. Plants with milky juice. 287. 



74. Urticaceae. Flowers monoecious or dioecious ; calyx free from 

 i-seeded fruit. Leaves with stipules. 288. 



75' Juglandaceae. Male flowers in catkins, stamens oo on a bract ; 

 ovary i-celled, I ovule. Trees with pinnate leaves. 290. 



76. Myricaceae. Like 75, but stamens few ; no calyx. Leaves 

 simple. 291. 



77. Cupuliferae. Ovary 2-3-celled ; fruit i-seeded nut. Trees 

 with simple leaves. 292. 



78. Salicaceae. Perianth of scales ; ovary i-celled ; capsule 2-4- 

 valved, seeds plumed. Shrubs or trees with alternate leaves. 294. 



Superior Endogens. 



79- Orchidaceae. Flowers very irregular ; stamens 1-2, confluent 

 with style, pollen in masses. 296. 



80. Iridaceae. Flowers regular, 3-merous ; stamens 3, anthers 

 extrorse ; leaves 2-ranked, equitant. 299. 



8 1. Amaryllidaceae. Flowers regular; stamens 6. Bulbous 

 herbs. 300. 



Inferior Endogens. 



82. Alismaceae. Flowers regular, 3-merous ; anthers extrorse ; 

 ovaries 3, distinct. Marsh herbs. 301. 



83. Naiadaceae. Perianth scale-like ; aquatic plants ; stems joint- 

 ed, with sheathing stipules. 302. 



84. Typhaceae. Flowers imperfect, in close clusters ; ovules 1-2, 

 pendulous. Aquatic plants with linear leaves. 303. 



85. Araceae. Flowers on a spadix ; berry with few seeds ; leaves 

 mostly reticulate. Plants with acrid juice. 303. 



86. Liliaceae. Perianth regular ; ovary 3-celled ; seeds OQ. 305. 



87. Smilaceae. Flowers regular, imperfect. Climbing plants, with 

 tendril-stipules. 309. 



88. Juncaceas. Flower structure like 87, perianth glumaceous. 

 Herbage grass-like. 309. 



