lfi Karl M. Wiegand and Arthur J. Eames 



page 

 j. Stamens as many as the lobes of the corolla. 



Caprifoliaceae 384 

 /'. Stamens fewer than the lobes of the corolla. 



Valerianaceae 390 

 i. Leaves opposite with stipules, or whorled and without stipules. 



Rubiaceae 380 

 h. Corolla wanting, or not markedly differing from the calyx, or 

 of separate petals. 

 i. Plants parasitic on the branches of trees, nearly leafless and 



not green Loranthaceae 184 



/. Plants not parasitic, green. 



/. Plants floating aquatics ; rarely emersed when water dries 

 out ; leaves whorled. 



k. Leaves pinnatifid or almost wanting Myriophyllutn 318 



k. Leaves linear or oblong. 



/. Perianth 3- or 6-parted ; leaves in whorls of 3. . .Elodea 55 

 /. Perianth entire ; leaves in whorls of more than 5. 



Hippuris 318 

 /. Plants not floating aquatics. 



k. Flowers regular ; stamens not fused with style. 

 /. Ovary 1^1-celled ; stamens 2-8 ; petals 0-4. 



Onagraceae 313 

 /. Ovary 1-celled; stamens 10; petals 0. .Chrysosplenhim 238 



k. Flowers irregular; stamens fused with style Listcra 159 



/. Leaves alternate or basal. 



g. Flowers in simple, compound, or paniculate umbels ; leaves usually 

 compound. 

 /;. Fruit dry, splitting into two parts; ovary 2-celled; styles 2. 



Umbelliferae 320 



/;. Fruit fleshy ; ovary 5-celled; styles 5 Aralia 319 



g. Flowers in involucrate heads (see also 3d g) Compositae 394 



g. Flowers neither in umbels nor in involucrate heads (or rarely in 

 simple umbels and the leaves simple). 

 //. Corolla gamopetalous. 



i. Plants twining or climbing, usually with tendrils. 



CUCURBITACEAE 392 



;'. Plants neither twining nor climbing. 



j. Corolla regular; anthers separate Campanulaceae 392 



;'. Corolla irregular ; anthers syngenesious Lobeliaceae 393 



/;. Corolla polypetalous, wanting, or not markedly differing from 

 the calyx. 

 i. Leaves parallel-veined, entire ; monocotyledons. 



j. Plants aquatic ; flowers inconspicuous, greenish, unisexual ; 



( stamens 3-12 ; ovary 1-celled) Vallisneria 55 



j. Plants terrestrial ; flowers often showy, perfect. 



h. Flowers irregular ; stamens 1-2, fused with the style ; 



ovary 1-celled Orchidaceae 151 



k. Flowers regular ; ovary 3-celled. 



/. Stamens 6 Amaryllidaceae 150 



/. Stamens 3 Iridaceae 150 



i. Leaves netted-veined, pinnatifid. 

 j. Ovary 1-celled. 



k. Flowers borne on a fleshy spike inclosed in a spathe. 



Symplocarpus 135 

 k. Flowers cymose ; spathe wanting Santalaceae 184 



