12 ANALYSIS OF THE NATUKAL ORDERS. 



m Stamen 1, style* 2. Leaves opposite CALLITRI^IIACE^; 116 



w Stamens 2, styles 2. Leaves alternate, dissected.. PODOSTEMIACEJE. 117 

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



n Fruit a double samara (2-wiuged) ORDEK 3V 



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



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



o 1-seeded. Stamens 4 or 8 ELEAGNACE^E. 112 



o 1-seeded. Stamens 3. Parasites.. LORANTHACE^:. 109 



p Anthers opening by valves. Calyx colored LATJRACE.E. 108 



p Anthers opening by slits. q Calyx colored. Stain. 8.. ..THYMELACEJE. Ill 



q Calyx greenish ; raccmed ORDER 37 



q Cal. green ; spiked. S. FUI..COMBRETACEJE. (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 



t Stamens numerous ORDER 47 



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



t Leaves pinnate. Pistils 5, scarcely united ORDKR 31 



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

 t Leaves simple, expanded. Fls. 3-parted. Fruit dry.. EUPHORBI ACE M, 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 CUPULIFEU.E. 122 



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

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



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



y Ameiits 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 SAUCACE.E. 125 



. COHORT 4. THE CONOIDS. 



* Leaves pinnate. Stem simple, palm-like. Sterile flowers in cones CYCADACE.E. 125 



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



* Leaves simple. Stem branching. Fertile flowers solitary TAXACE.fi. 128 



E. COHORT 5. THE SPADICEOUS ENDOGENS. 



Trees or shrubs >v';h -palmi-cleft leaves all from one terminal bud, I PALMACEJE 139 



and a branching u spadix" from a spathe ' 



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



2 Plants frond-like, minute, floating loose on the water LEMNAOE^:. 131 



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



3 Spadix evident, in a spathe or on a scape ARACE^E. 130 



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



4 Flowers with no perianth, densely spicate or capitate TYPHACE.E. 132 



4 Flowers with a perianth or not. Plants submersed NAIADACE*:. 133 



