68 AETIFICIAL KEY TO THE FAMILIES. 



Flowers simple and regular, destitute of stamens, but provided with ovaries. 

 (The stamens in separate flowers, cither upon the same plant, or a 

 dijfferent one.) 



• Plant living in water. 



1. Leaves circular, floating on the surface Froghit, 405 



2. Leaves pectinate, plant almost wholly submerged.. ..Feathcr-iveed, 284 



3. Leaves minute, egg-shaped, entire, in threes Anacharis, 406 



•* Plant parasitic on trees. 



Branches dichotomous. Leaves entire Mistletoe, 347 



*»♦ Plant livino on land, with its roots in the earth. 



A. Stem provided with tendrils. 



Flowers large, yellow, axillary, and solitary Cucumber family, 350 



Flowers small, greenish, in loose clusters of five 



or six , .Bryony, 351 



B. Stem twining. Flowers in loose racemes Tamus, 467 



c. Stems all prostrate. Leaves linear Croivherry, 362 



D. Stem erect. 



Plant covered with stings Nettle, 35G 



Destitute of stings. 



1. Leaves pinnate (tree) Simiach, 152 



2. Leaves septate Hemp, 355 



3. Leaves ternate Garden Strawberry, 202 



4. Leaves fan-lohed. 



Flowers solitary Cloudberry, 201 



Flowers in corymbs Begonia, 351 



5. Leaves pinnatiiid. 



Flowers solitary, very large Pccony, 90 



Flowers minute, in little corymbs Valerian, 310 



6. Leaves simple, undivided, and symmetrical. 



Blotched with yellow (shrub) Aucuba, 348 



Uniform green. 



Tree or shrub Bay -tree, 169 



Herbaceous. 



a. Flowers axillary, green ; ovaries 2... Mercury, 359 



b. Flowers in corymbs ; ovary free, in- 



side. 



Flowers red Rose Lychnis, 143 



Flowers white White Lychnis, 142 



c. Flowers in corymbs ; ovary three- 



cornered, beneath Begonia, 3ril 



7. Leaves simple, undivided, larger upon one side 



of the midrib tlian on the other Begonia, 351 



