II. SYNOPTICAL KEY TO THE OEDEES, &c. 



SUBCLASS I. ANGIOSPERMJE continued. 



DIVISION III. APETAL^E : corolla (and sometimes calyx) wanting. 

 A. Ovary superior, free from the calyx though sometimes enveloped in it. 



* Ovary 1 -celled : ovules solitary, basal : embryo coiled or more or less curved. Herbs or rarely 



shrubs. 



+- Fruit an akene. 



76. Nyctaginaceae, p. 1. Calyx corolla-like, tubular to funnelform or campanulate, the per- 



sistent l>ase hardening and enclosing the akene. Stamens hypogynous. Style simple. 

 Herbaceous, with opposite entire leaves, no stipules, and involucrate flowers. 



77. Folygonaceae, p. 6. Calyx mostly persistent, of 3 to 6 segments, distinct in 2 rows or 



united, the inner or all petaloid. Stamens perigynous. Styles 2 to 4. Akeiie mostly 

 triangular. Embryo nearly straight. Herbs or rarely woody, with mostly alternate 

 entire leaves, with or without sheathing stipules ; flowers on jointed pedicels, often 

 involucrate. 



+- +- Fruit a utricle : flowers sessile : leaves mostly alternate ; stipules none. 



78. Amarantaceae, p. 40. Calyx persistent, of 3 to 5 distinct more or less scarious sepals 



in one row. Stamens hypogynous. Style simple or none. Seed lenticular, vertical. 

 Embryo annular. Herbs with entire leaves ; flowers scarious-bracteate. 



79. Chenopodiaceae, p. 43. Calyx of 5 or fewer mostly herbaceous sepals in 1 row, or none. 



Styles or stigmas 1 to 4. Embryo annular or spiral. Herbs or shrubby ; flowers often 

 unisexual, the perfect and staminate without bracts, the pistillate usually naked within 

 herbaceous bracts. 



* * Ovary 4-celled : ovules solitary, basal : embryo curved. 



80. Batideae, p. 60. A fleshy maritime shrub, with dioecious bracteate flowers in sessile axillary 



ament-like spikes. Ovaries coherent, becoming fleshy. 



* * * Ovary 1-celled : ovules solitary, pendulous or sometimes erect : embryo straight. 



+- Trees or shrubs, with alternate entire leaves and no stipules : fruit a berry or drupe : embryo 



with large thick cotyledons. 



n- Flowers perfect ; calyx deciduous : ovule pendulous. 



81. Lauraceae, p. 60. Calyx 6-parted. Anthers opening by valves. Fruit a drupe. Aromatic 



trees. 



82. Thymeleaceae, p. 61. Calyx gamosepalous, 4-cleft. Fruit a berry. Shrubs with very 



tough bark. 



+t ++ Flowers dioecious : calyx persistent about the ovary, becoming thickened or baccate : 



ovule erect. 



83. Elaeagnaceae, p. 62. Calyx of fertile flowers tubular. Shrubs with scurfy foliage. 



+- +- Herbs or trees, with unisexual flowers, and mostly lobed or serrate and stipulate leaves : 



fruit an akene. 



84. Urticaceae, p. 63. Filaments in flexed in the bud. Akene flattened ovoid. Seed erect. 



Herbs with tough bark, mostly opposite and serrate leaves, and usually cymose axillary 

 inflorescence. 



90. Ceratophyllaceae, p. 78. Submerged aquatic, with sessile filiformly divided exstipulate 

 leaves and axillary sessile flowers without calyx. Anthers sessile. Akene beaked. 

 Ovule pendulous. 



85. Platanaceae, p. 65. Inflorescence in dense globose heads. Akene obpyramidal, beaked. 



Ovule pendulous. Trees with flaky bark and lobed stipulate leaves. 



