14 



ANALYTICAL KEY 



376 



branching 

 Illecebraceae, 376 



Amaranthaceae, 371 



Leaves without stellate hairs ; embryo curved or 

 coiled. 

 Stipules scarious IiiLECEBRACEAEj 



Stipules none. 

 Leaves opposite.* 

 Plant fleshy Salicornia, 369 



Not fleshy. 



Flowers in heads or spikes, these often 



panicled; anthers 1-celled Amaranthaceae, 371 

 Flowers sessile in forks of 

 inflorescence 

 Leaves alternate. 

 Flowers and bracts scarious 

 Flowers small, chiefly greenish ; no scarious 



bracts Chenopodiaceae, 364 



/. Shrubs or trees. 



Leaves small, linear or scale-like ; low heath-like shrubs 



Empetraceae, 551 

 Leaves oblong to orbicular ; never heath-like. 

 Leaves opposite. 

 Fruit 3-celled, not winged 

 Fruit 2-celled, a double samara 

 Fruit 1-celled, a single samara 

 Leaves alternate. 

 Ovary 3-celled 

 Ovary 1-2-celled. 

 Styles and stigmas 2 

 Style and stigma 1. 

 Anthers opening lengthwise 

 Anthers opening by uplifted lids 

 d. Ovary inferior or so closely and permanently invested by the 

 calyx as to appear so. 

 Parasites on the branches of trees ^ 

 Aquatic herbs 

 Terrestrial. 

 Herbs with calyx colored like a corolla. 

 Leaves opposite, simple 

 Leaves alternate, pinnate 

 Leaves alternate, simple 

 Shrubs or trees. 

 Leaves scurfy 

 Leaves not scurfy, opposite 

 leaves not scurfy, alternate. 

 Style 1, stigmatic down one side; flowers solitary, in 



pairs, or in umbel-like clusters Nyssa, 625 



Style 1, short; stigma terminal ; flowers racemose P ijru la r la, 3iiO 

 Styles 2 Hamamelidaceae, 452 



b. Ovary or its cells containing many ovules I. 

 I. Calyx none ; ovary and fruit naked. 



Aquatic herb Podostkmaceae, 441 



Tree or shrub Hamamelidaceae, 452 



I. Calyx present m. 

 m. Ovary superior. 



Rhamnaceae, 5()0 



Aceraceae, 557 



Oleaceae, 650 



Rhamnaceae, 5(30 



Urticaceae, 344 



Thymelaeaceae, 589 

 Lauraceae, 413 



Loranthaceae, 351 

 Haloragidaceae, 602 



Nyctaginaceae, .375 



Sanguisorba, 494 



Comandra, 350 



Elaeagnaceae, 590 

 Nestronia, 350 



