Family ROSACEZ&# 131 
Subclass CALYCIFLORAE 
ROSALES. 
Flowers, if in dense globose heads, perfect. 
Corolla regular, or wanting. ; 
Ovary superior; carpels, if enclosed in the hypanthium, free 
from it and from each other. ; 
Carpels 2—many. 
Fruits achenes or drupelets, ovules few, carpels numerous. 
1. Rosaceze. 
Fruits follicles or capsules, ovules numerous, carpels few. 
Shrubs. 1. Rosacee. 
Herbs. 
Carpels 4-5, separate or united only at the base. 
3. Crassulacee. 
Carpels 2, or if more united to the top of the ovary. 
4. Saxifragacee. 
Carpel single. 
Fruit an achene or drupe; leaves simple. 1. Rosacez. 
Fruit a legume; leaves compound. 
Flowers not in dense heads or spikes, petals imbricated. 
2a. Cesalpiniacee. 
Flowers in dense heads or spikes, petals valvate, stamens 
mostly long exserted. 2b. Mimosacee. 
ery inferior; carpels united to each other and to the hypan- 
thium. ; 
Fruit a many-seeded berry; shrubs, often spiny; styles 2. 
4. Saxifragacee. 
Fruit a pome; trees or shrubs; styles 1-5. 1. Rosacee. 
Corolla irregular; fruit a legume. 
Stamen filaments not united. 
Standard enclosed by the wings in the bud; trees, or herbs 
with nearly regular corolla. 2a. Cesalpiniacez. 
Standard enclosing the wings in the bud; herbs with typical 
pea-like flowers. 2c. Papilionacee. 
Stamen filaments united. 2c. Papilionacee. 
Flowers in dense globular heads; monecious trees; buds enclosed in 
the hollow base of the petioles. 5. Platanacee. 
1. ROSACEZ. 
Rose Family. 
Carpels 1-2-ovuled, generally one-seeded in fruit, indehiscent. 
Carpels free from each other and if enclosed in a receptacular cup 
free from it. 
en numerous, developing into numerous achenes or drupe- 
ets. 
Pistils not enclosed in the receptacle. 
Fruits achenes: calyx often with a whorl of bracts, making 
it appear double. 
Styles short, not elongating in fruit, neither jointed nor 
plumose. 
Styles terminal, flowers mostly yellow. 1. Potentilla. 
