The Flora of the Cayuga Lake Basin 17 



PAGE 

 j. Ovary 2-4-celled (see also 3d /). 



k. Styles or sessile stigmas 3 or 4 ; petals inconspicuous or 

 wanting ; aquatic or marsh' plants, often with pinnatifid 



leaves Haloragidaceae 318 



k. Style 1, bearing 1-4 stigmas; petals often showy; marsh 



or upland plants Onagraceae 313 



j. Ovary 6-celled; petals mostly wanting. . Aristolochiaceae 185 

 e. Woody plants. 



/. Staminate flowers in catkins, or in short, globular, drooping spikes 

 (see also Nyssa and Urticaceae). 



g. Leaves pinnate Juglandaceae 172 



g. Leaves simple. 



h. Stigmas or styles 2 ; ovary 1-2-celled Betulaceae 174 



h. Stigmas or styles 3 ; ovary 3-7-celled Fagaceae 177 



/. Flowers not in catkins nor in globular drooping spikes. 

 g. Leaves opposite or whorled. 



h. Leaves stipulate or whorled Rubiaceae 380 



/;. Leaves opposite without stipules, or if stipulate the corollas 

 rotate or saucer-shaped. 



i. Petals 4-5, united Caprifoliaceae 384 



i. Petals 4, separate Corn us 327 



g. Leaves alternate. 



h. Flowers umbellate, minute, greenish Araliaceae 319 



/;. Flowers not umbellate. 

 i. Flowers perigynous. 



j. Flowers in late autumn Hamamelidaceae 241 



j. Flowers in spring or summer. 



k. Petals not longer than the sepals ; stamens 4-5 .... Ribcs 239 

 k. Petals longer than the sepals ; stamens 5-many. 



Rosaceae 241 

 i. Flowers epigynous. 



j. Ovary 1-2-celled; polypetalous or apetalous ; stamens 4—15. 



Cornaceae 327 

 j. Ovary 4-5- or 10-celled ; polypetalous or gamopetalous ; 



stamens 8-10 Ericaceae 329 



d. Ovary superior, except sometimes at base. 



c. Corolla wanting or not markedly differing from the calvx. 

 (2d c, p. 19.) 

 /. Plants grass-like, with very small green or brown flowers ; perianth 

 when present rigid ; bracts rigid. 



g. Perianth present, 6-parted Juxcaceae 137 



g. Perianth wanting, or of bristles or irregular scales. 



h. Leaves in i phyllotaxy, usually with open sheaths ; culms 



terete or flattened, usually hollow Gramineae 55 



h. Leaves mostly in i phyllotaxy, with closed sheaths; culms 



terete or 3-angled, solid Cyperaceae 92 



/. Plants not grass-like, or if so with petaloid soft perianth. 



g. Plants aquatic, rooting or floating, only the flowers sometimes 

 raised above the surface; rarely emersed in the mud when the 

 w y ater dries out. 

 /;. Submerged leaves entire or denticulate. 



i. Flowers yellow Heteranthera 137 



/'. Flowers not pure yellow. 



j. Flowers in dense racemose monoecious heads. 



Sparganiaceae 44 



