XXVI 
KEY TO THE NATURAL ORDERS. 
ft Flowers irregular. 
5. Fumarface.e. Stamens 6, in 2 bundles. Fruit 1-celled. 
11. Polyoalace.e. Stamens 8, in 2 bundles. Fruit 2-celled. 
25. Leguminos.e. Stamens 10. Flowers papilionaceous. Fruit a Iegumft. 
7. Resedace.e. Stamens 10 or more. Fruit 1-celled, opening at the top. 
Petals distinct. Stamens perigynous or epigynous. 
25. Leouminos^e. Corolla papilionaceous. 
2G. Rosacea. Corolla regular. Stamens numerous. Carpels more or less distinct. 
Leaves with stipules. 
* Ovary superior or half-inferior. 
f Carpels several. 
34. Crassulace.e. Carpels 2 or more, distinct. Leaves without stipules. 
tf Ovary solitary, 1-celled. 
32. Porti’lace.e. Sepals 2. Placenta central. Leaves without stipules. 
33. Illecebrace.«e. Sepals 5. Placenta central with several seeds, or fruit 1 -seeded. 
17. IIypericace^e (Paraassia). Sepals 5. Placentas 4, parietal. Seeds many. 
30. Tamaricace.e. A shrub. Placentas 3, parietal. Stigmas 3, feathery. 
ftt Ovary solitary, 2- or more-celled. 
3G. Saxifragace.e. Herbs. Stamens twice as many as the petals. Styles 2, 
diverging. Seeds numerous. 
24. Riiam.vace.e. Shrubs. Stamens equal in number to the petals, and opposite to 
them. Fruit a berry. 
23. Celastrace.e. A shrub. Stamens alternating with the petals. Fruit a capsule. 
29. Lytiirace.e. Herbs. Calyx valvate in aestivation. Style 1. 
50. Pyrolacile. Herbs. Calyx imbricated in aestivation. Style 1. 
** Ovary inferior, 
t Ovary 1-celled. 
35. Grossflariace.e. Ovary 1-celled. Fruit a berry. Sepals and petals 4-5. 
Stamens 4-5, alternate with the petals. 
ft Ovary 2- or more-celled. 
27. Onagrace.*. Stamens 2, 4, or 8. Style 1. Leaves opposite or alternate. 
Petals twisted in aestivation. 
28. Haloragace.e. Aquatic herbs. Flowers monoecious. Leaves whorled. 
39. Cornace.e. Petals 4, valvate in aestivation. Stamens 4, alternating with the 
petals. Leaves opposite. 
38. Araliace.e. An evergreen creeping shrub. Petals 5, valvate in aestivation. 
37. Um belli ferae. Herbs. Flowers in umbels. Petals 5. Stamens 5. Fruit 
splitting into 2 dry 1-seeded carpels. Leaves alternate. 
Petals united. 
# Ovary inferior or half-inferior. 
+ Flowers sessile, in close heads upon a dish within an involucrum {capitate). 
45. Composite. Stamens 5 ; anthers united into a tube. 
44. Dipsace.e. Stamens 4; anthers separate. 
tt Flowers not capitate. 
31. Cfjcukbitacejs. A climbing herb. Flowers dioecious. Ovules several in each cell. 
