12 ANALYSIS OF THE NATUEAL ORDERS. 



m Stamen 1, styles 2. Leaves opposite CALLITRI^HACE^; 116 



m Stamens 2, styles 2. Leaves alternate, dissected.. PODOSTEMIACE^E. 117 

 m Sta. 12-24, style 1. Lvs. verticillate, dissected.. CERATOPHYLLACE^E. 118 



n Fruit a double samara (2-winged) ORDER 37 



n Fruit a single samara (1-winged), or a drupe. Stamens 2 ORDER 101 



n Fruit not winged, o 3-seeded. Stamens 4 EUPHORBIACE^E. 113 



o 1-seeded. Stamens4or8 ELEAGNACE^E. 112 



o 1-seeded. Stamens 3. Parasites.. LORANTHACEJE. 109 



p Anthers opening by valves. Calyx colored LAURACE^E. 108 



p Anthers opening by elks. q Calyx colored. Stam. 8 THYMELACE^E. Ill 



q Calyx greenish ; racemed ORDER 37 



q Cal. green ; spiked. S. Fla..CoMBRETACE^E. (50) 



r Ovary and seed only 1, in the juicy drupe. Trees ORDER 65 



r Ovaries 2 4, seed 1. Fruit a drupe or nut. Shrubs. . .SANTALACE^E. 110 



s Stamens numerous ORDER 47 



e Stamens as many as the calyx lobes J 1. URTICACE^E. 114 



t Leaves pinnate. Pistils 5, scarcely united ORDER 31 



t Leaves simple, linear, evergreen. Shrubs heath-like.. EMPETRACE^;. 119 

 t Leaves simple, expanded. Fls. 3-parted. Fruit dry .. EUPHOHBIACE^E. 113 



t Leaves simple, expanded. Fls. 4- or 5-parted. Fruit fleshy ORDER 40 



V Nut drupaceous, naked. Leaves pinnate JUGLANDACE.E. 121 



v Nut or nuts in a cup or involucre. Leaves simple CUPULIFER^E. 122 



x Frnit fleshy, aggregated (sorosis). Juice (or sap) milky... 2. URTICACE^E. 114 

 x Fruit dry. Plants with a watery juice or sap. . (y) 



y Ameuts globular, racemed. Nutlets 2-celled, woolly ORDER 65 



y Aments globular, solitary. Nutlets 1-celled, 1-seeded PLATANACE.E. 120 

 y Aments cylindrical or oblong. . (z) 



z Ovary 2-celled, 2-ovuled, 1-seeded. Fruit often winged.. BETULACE^E. 123 



z Ovary 1-celled, 1-seeded. Fruit often fleshy MYRICACE.E. 124 



t Ovary many-ovuled, many-seeded. Seeds comous SALICACEJE. 125 



D. COHORT 4. THE CONOIDS. 



Leaves pinnate. Stem simple, palm-like. Sterile flowers in cones CYCADACK*. 120 



Leaves simple. Stem branching. Fertile flowers in cones CONIFERS. 127 



Leaves simple. Stem branching. Fertile flowers solitary TAXACE^E. 123 



E. COHORT 5. THE SPADICEOUS ENDOGEN8. 

 Trees or shrubs wivh ^almi-cleft leaves all from one terminal bud, I D. T , 



r . . . 1 A l.-il At hi^K. J**i 



and a branching '-spadix" from a spathe ' 



Herbs with simple, rarely ternate leaves. Spadix simple . . (2) 



2 Plants frond-like, minute, floating loose on the water LEMNACE^E. 131 



3 Plants with stem and leaves, rooting and fixed.. (3) 



3 Spadix evident, in a spathe or on a scape ARACEA. 130 



3 Spadix obscure or spike-like. Stems leafy.. (4) 



4 Flowers with no perianth, densely spicato or capitate TYTUACE^E. 132 



4 Flowers with a perianth or not. Plants submersed NAIADACE.B. 138 



