KEY TO FAMILIES xxix 



(x) Leaves deeply cut or compound Aceraceae 217 



(y) Leaves simple, not deeply cut Urticaceae 33 



b. Herbs 



(1) Nearly colorless herbs, parasitic om trees Loranthaceae 216 



(2) Plants grass-like, sometimes leafless; sepals 



6 



(a) Ovaries 3-6, separating at least when ripe Juncaginaceae 303 



(b) Ovary 1, of 3 carpels Juncaceae 312 



(3) Plants with broad green leaves 



(a) Pistils several-many Ranunculaceae 1 



(b) Pistil 1, at least the ovary 



x. Stamens as many as the sepals or fewer 

 (x) Ovary superior 



m. Flowers and bracts papery, not 



withering Amarantaceae 67 



n. Flowers and bracts not papery and 

 not persistent 

 (m) Flowers in small involucres, or 

 the stems with papery 

 sheaths at the joints Polygon aceae 51 



(n) Flowers not in involucres, and 

 stems without papery 

 sheaths 

 r. Style and stigma 1, or 2 : if the 

 latter, the leaves digitate or 

 digitately lobed Urticaceae 33 



s. Styles 2-5, the leaves simple or 

 pinnatifid 

 (r) Styles 2-3; leaves typically 



alternate Chenopodiaceae 59 



(s) Styles 3-5; leaves opposite Aizoaceae 50 

 (y) Ovary half-inferior ; style and 



stigma 1 Santalaceae 216 



(z) Ovary inferior 

 m. Leaves alternate Apiaceae 223 



n. Leaves opposite Nyctaginaceae 68 



y. Stamens more numerous than the sepals 

 (x) Ovary superior 

 m. Sepals 4 



(m) Stamens 6; style and stigma 1 Brassicaceae 16 



