90 
CALYCirLORJS. 
mens twice as many as the petals, nearly liypogynous. Style 1. 
Ovary superior. Leaves green, without stipules.] 
30. Lythrace.'e. Calyx of one piece with teeth, valvate in aestivation. 
Stamens inserted on the mouth of the calyx, alternate with the 
petals when as few. Style 1. Ovary superior. 
37. Saxifragace.e. Calyx deeply divided or spreading, imbricated in 
aistivation. Stamens twice as many as the petals. Styles 2 or 
more. Fruit superior or oulv partly so. Seeds numerous in each 
cell. 
25. liiiAMNACE.E. Calyx valvate in aestivation. Stamens as many as 
and opposite to the minute petals. Fruit superior or partly so. 
24. Celastrack.e. Calyx spreading ; calyx and petals imbricated in 
aestivation. Stamens as many as the petals and alternating with 
them. Disk large, expanded, flat, closely surrounding the ovary, 
and covering the flat bottom of the calyx. Fruit superior or partly 
so, dehiscing, seeds never bony. Leaves simple. 
23. Staphyleace.e. Calyx deeply divided, erect; calyx and petals 
imbricated in aestivation. Stamens as many as the petals and 
alternating with them. Disk large, covering the bottom of the 
calyx. Ovary quite free. Fruit superior. Seeds bony. Leaves 
pinnate. 
28. Onagraceas. Calyx-segments valvate ; petals convolute in activa- 
tion. Style 1. Ovary inferior. 
29. Haloragace.e. Monoecious. Sepals 4. Stamens 8. Styles 4. Fruit 
inferior, splitting into 4 indehiscent 1-seeded achenes. Leaves 
opposite or verticillate. 
38. U.mb ellifek.e. Petals 5, imbricated in activation. Stamens 5, 
alternating with the petals. Stifles 2. Fruit inferior, splitting 
into 2 indehiscent 1-seeded carpels. Leaves alternate. 
39. Araliace.e. Petals valvate in aestivation. Styles several, distinct 
or combined. Fruit inferior, baccate ; cells each 1-seeded. Leaves 
alternate. 
40. Coknaceas. Petals 4, valvate in aestivation. Stamens 4, alternating 
with the petals. Style 1. Ovary inferior. Leaves opposite. 
B. Corolla monopelalous. 
a. Carpels and styles several, distinct. 
35. Crassulaceae. Stamens inserted upon the corolla. 
b. Carpels united into a solitary ovary. 
* Ovary inferior or partly superior, with one perfect cell. 
f Ovules several in each cell. 
[66. Primulaceas. Flowers perfect. Placenta central, free. Erect 
plants.] 
32. Cucurbit acea:. Flowers imperfect. Placentas parietal. Plants 
with tendrils. 
ft Ovules solitary in each cell. 
46. Composite. Flowers upon a receptacle, within a common involucre. 
Anthers of the perfect flowers united. Ovule erect. Albumen 
wanting. 
45. Difsacaceae. Flowers perfect, upon a receptacle, within a common 
involucre. Anthers and tilameuts distinct. Ovule pendulous. Al- 
bumen fleshy. Leaves opposite. 
