14d ANALYTIOAL KEY. 
°° © Shrubs or trees ; leaves alternate, entire (except in the last). 
Calyx tubular, bearing the stamens; akene tailed............0.00-e000- Rosacew, 49 
Calyx 6-parted, yellowish; leaves aromatic..........ssceeececcecseers Lauracez, 106 
Calyx 4-5-cleft, greenish; fruit cherry-like............00 ceeeeeeeee Rhamnaceez, 35 
Calyx 3~4-cleft, yellowish; stamens 6-8...........ccecceecceecseee Thymelacez, 107 
Calyx 5-cleft, bright yellow; stamens 5, united..........0..eeeeeee Sterculiacez, 20 
“*** Trees; leaves opposite, pinnate. 
Fruit.a:slender samarais: « «so acvs os xcveseanawsianyaane simecewsiesere sears Oleacex, 73 
Fruit a double samara. ....... ccs eee scene cee connccacseeersseceees Sapindacez, 37 
“**** 4 half-woody alinibens leaves opposite.—Clematis, 16. 
CLASS I!.—EHNDOGENS OR MONOCOTYLEDONS. 
A. Perianth adherent to the ovary (ovary inferior). 
Flowers irregular. Anthers 1 or 2 on the pistil............ceeeseeee Orchidacez, 108 
Flowers regular. Stamens 3, anthers extrorse........scececseecceceecs TIridacez, 110 
B. Perianth free (ovary superior). 
Flowers in whorls. Carpels 8 to many Alismacez, 108 
Pistil 3-celled; stamens 3 to 6.........ceccccccccccccceccccuceccscvecs Liliacez, 110 
Flowers greenish in a spiko............eccee eee e cence ee Triglochin in Alismacez, 108 
Perianth 4-parted; stamens 4. Stem 2-3-leaved...........0. eeeeee Maianthemum, 115 
Ristil 2-celled; red flowers in an umbel..........ccceeccces os assests stares Clintonia, 119 
