ANALYTICAL KEY. 



* Shrubs or trees; leaves alternate, entire (except in the last}. 



Calyx tubular, bearing the stamens; akene tailed Rosaceae, 49 



Calyx 6-parted, yellowish; leaves aromatic Lauracese, 106 



Calyx 4-5-cleft, greenish; fruit cherry-like Rhamiiaceae, 35 



Calyx 3-4-cleft, yellowish; stamens 6-8 Thymelacese, 107 



Calyx 5-cleft, bright yellow; stamens 5, united Sterculiaceae, 20 



* * * * Trees ; leaves opposite, pinnate. 



Fruit a slender samara OleaceEe, 73 



Fruit a double samara SapimlacecS, 37 



***** A half -woody climber; leaves opposite. Clematis, 16. 

 CLASS II. ENDOGENS OR MONOCOTYLEDONS. 



A. Perianth adherent to the ovary (ovary inferior). 



Flowers irregular. Anthers 1 or 2 on the pistil OrchidaceEe, 108 



Flowers regular. Stamens 3, anthers extrorse Iridaceae. 110 



B. Perianth free (ovary superior). 



Flowers in whorls. Carpels 8 to many Alismaceae, 108 



Pistil 3-celled; stamens 3 to 6 Liliace^, 110 



Flowers greenish in a spiko , Trljhchin in Alismaceae, 108 



Perianth 4-parted; stamens 4. Stein 2-3-leaved MaiantJiemum, 115 



Pistil 2-celled; red flowers in an umbel Clintonia, 1 19 



