KEY TO THE FAMILIES OF CLASS I. 109 
II. Monopetalous Division. Corolla with the petals more or less united into one piece. (Those 
which rank in other divisions are marked f.) 
A. COROLLA ON THE OVARY, i. e. tube of calyx coherent. 
Stamens united by their-anthers, and 
Not by their filaments. Flowers in heads, with a calyx-like involucre, Composite F. 164 
Also generally by their filaments, more or less. Flowers not in heads. 
Corolla irregular, split down one side. Flowers perfect, LoBe.ia F. 167 
Corolla regular, succulent vines, with tendrils. Flowers moneecious, tGourp F. 154 
Stamens separate from each other, and 
Inserted on the corolla. Leaves opposite or whorled. 
Leaves opposite, without stipules. Head of flowers with an involucre, TEASEL F. 164 
Leaves opposite, without stipules. Head, if any, without an involucre. y 
Stamens two or three fewer than the 6 lobes of the corolla, VALERIAN F. 164 
Stamens as many as the lobes of the corolla,-or one fewer, -HonrEYsuckKLe F. 161 
Here one might expect to find the tMrrasiuis F. 191 
Leaves whorled, without stipules, } F Mapper F. 163 
Leaves opposite, with stipules, 
Inserted with, but not on, the regular corolla. 
Stamens as many as the lobes of the corolla. Herbs, CAMPANULA F. 167 
Stamens twice as many as the lobes of the corolla. Woody-plants, HuckLEeBEerry F. 168 
B. CoRoLLA ON THE RECEPTACLE BELOW THE OVARY, i. e..Calyx free (except in Brookweed). 
1. Star more in ber than the lobes of the corolla. 
Leaves compound: pod one-celled. Flowers commonly irregular. F 
Stamens 10 or rarely more when the flower is regular, fPuusE F. 141 
Stamens 6 in two sets. Petals 4, united, +Fumirory F. 123 
Leaves simple or palmately divided. Stamens many, monadelphous in a tube, tMattow F. 181 
Leaves simple, undivided. Stamens united only at the bottom, or boperate 
Stamens very many, adhering to the base of the-corolla, ‘FCAMELLIA F, 184 
Stamens on the corolla, twice or four times as many as ‘its lobes, Exsony F. 172 
Stamens separate from the corolla, twice as many as its lobes, HEATH F. 168 
2. Stamens just as many as the lobes of the regular-corolla, 5, 4, or rarely 6 or 7. 
Stamens one opposite each division of the corolla. 
Styles 5: calyx a chaff-like cup: petals 5, almost distinct, Leapwort F. 173 
Style 1. (Petals sometimes almost distinct,) Primrose F. 173 
Stamens alternate with the divisions or lobes of the corolla,’5 or rarely 4, 
Inserted on the receptacle, Heatu F: 168 
Inserted on the corolla, but connected more or less with the stigma. Juice 
milky. Ovaries and pods 2 to each flower. 
Anthers lightly adhering to the stigma: filaments monadelphous, MiILKweep F. 188 
Anthers only. surrounding the stigma: filaments distinct, Doapane F. 187 
Inserted on the corolla, free from the stigma. 
