14 Spring Flora of Ohio. 



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PAGE 



70. Leaves punctate with translucent and dark dots Hypei-icacece. 81 



70. Leaves not puctate with dots 71 . 



71. Sepals 5, very unequal or only '•'< Cistacecr. S2 



71. Sepals and petals 4, stamens (i Ciuiifeicc. 'A 



71. Sepals and petals 5; Stamens "> or 10 72y. 



72. Ovarj- and stamens raised on a stalk Pas>,iJ{vracecF. S4 



72. Ovary not raised on a stalk Saxifiagacetr. .')7 



73. Flowers irregular 74'. 



7o. Flowers regular or nearly so (78,. 



74. Anthers opening at top, (>-8, 1-celled ; ovary 2-celled Polygalacea. :'>7 



74. Anthers opening lengthwise 7.'i . 



Ti. Stamens 12; petals 0, on the throat of the caly.v Lythracecr. S.') 



7"). Stamens 5-8 or 10; petals nearly or quite hypogynous ,70 . 



76. Ovary .S-celle"d ; leaves digitate Hippocastauacfcr. 78 



7G. Ovary o-celled ; leaves trifoliate Staphyleacea. 77 



7(;. Ovary o-celled (77j. 



77. Flowers 5-merous ; leaves more or less lobed or divided. .Ccraw/ac^rr. 72 



77. Flowers 3-merous ; leaves pinnate, alternate Limnanthacecr. 7') 



77. Flowers 5-merous ; leaves trifoliate; styles .5 Oxalidaceer. Tl 



78. Stamens neither just as many, nor twice as many as 



the petals 79 . 

 78. Stamens just as many or twice as many as the petals 81'. 



79. Stamens united by their filaments in :> sets; petals o Hypei-icacctr. 81 



79. Stamens distinct, 4 long and 2 short rarely 2 or 4) ; petals \.. .Crnciferir. 51 



79. Stamens distinct and fewer than the 4 petals; trees or shrubs Oleaceic. !)(i 



79. Stamens distinct and more numerous than the petals 80 . 



80. Leaves digitate ; flowers irregular Hippocastanacecr. 78 



80. Leaves simple or pinnate ; fruit winged Aceracrtf. Ti 



80. Leaves trifoliate; fruit a bladdery inflated pod Staphyleaceir. 11 



81. Ovules only 1 or 2 in each cell ;82). 



81. Ovules several or many in each cell 8() . 



82. Herbs; flowers inonoecious in a cup-like involucre Etiphnrhiacecr. 74 



.82. Herbs; flowers perfect and symmetrical 8:!). 

 82. Shrubs or trees 84 . 



83. Flowers 5-nierous ; leaves more or less lobed or divided. .frVrrtw/acc^r. 72 



83. Flowers 3-merous: leaves pinnate and alternate Limnanthaceo'. 75 



83. Flowers 5-merous ; leaves trifoliate ; styles 5 Oxalidacea-. 72 



84. Leaves palmately veined ; fruit 2-winged Aceracecr. 77 



84. Leaves pinnately veined; fruit not winged 85. 



85. Pods colored, seeds in a pulpy aril Cclaatracecr. 76 



85. Fruit a berry-like drupe; caly.x minute Aqiti/oliaceir. 70 



86. Stipules between the opposite and the compound leaves, but cadu- 

 cous S/apJiylcacecP. 77 



86. Stipules none when the leaves are opposite 87 . 



87. Stamens united by their filaments at base, leaflets '.'<... .OxalidacfiO'. 72 

 87. Stamens' distinct, free from the caly.x (88 . 

 87. Stamens distinct, inserted on the calyx 89 . 



88. Style undivided Ei icacnr. 90 



88. Styles 2-5, separate Caiyophyllacccr. 38 



89. Styles 2 (or 3) or splitting into 2 in fruit Saxifragacecr. 67 



