XXX 
STirOPSIS Otf THE NATTJEAl OEDSES. 
Stamens 4 or 5. Fniit not bursting, 1-celled, 1-seeded. 
Limb of perianth manifest Ixix. Saniahcece. 
Stamens 4. Style filiform. Ovary 4-ceUed, many- 
seeded .xxix. Omgracea. 
Stamens 6, on base of perianth. Style 1, trifid. Fl. 
dicecioiis Ixxx. Dioscoreacea, 
Stamens 6 — 12, epigynoiis. Style short. Stigma ra- 
diant. Ovary 3— 6-celled, many-seeded. 
Ixx. Aristolochiacece. 
Stamens 8—10. Styles 2. Ovary 1-celled, 2-beaked, 
many-seeded, opening like a cup. 
xxxvi. Saxifragace<e. 
55 Fruit separating into several carpels 56 
Fruit not separating into carpels 57 
56 Carpels 4, not bursting. Stamen 1. 
Ixxiv. CallitrichacecB. 
Carpels 3 or 2, opening, separating with elasticity. 
Ixxii. Euphorbiacea, 
57 Leaves with stipules S8 
Leaves without stipules 59 
58 Stipules sheathing the stem bcvi. Potygonacea. 
Stipides attached to the petiole. 
xxvi. JRosacece (Sanguisorbesfe). 
Stipules free, deciduous. Ovary l-cell6d. 
Ixxv. Urticacea. 
Stipules free, deciduous. Ovary 2'-ceIlied. 
Ixxvi. Ulmacea. 
59 Flowers monoecious or dicecious 60 
Flowers perfect or polygamous ' 61 
60 Fruit fleshy. Stamens 2 or 3. Perianth of scales im- 
bricated in several rows Ixxi. EmpetracecB. 
Fruit dry. Stamens 3 or more. Perianth tubular. 
lx\-ii. EUeuqnacetB. 
Fruit dry. Stamens 12—20. Perianth 10— 12-cleft. 
Ixxiii. CeratophyllacecB. 
61 Perianth hardened over the fruit. 
xxxiii. EaronychiacecE (Scleranthese). 
Perianth not hardened over the fruit 62 
Perianth none. Fruit compressed linear and leaflike 
at the end xlix. Olcacea (Fraxinus). 
62 Perianth 3 — 5-cleft, herbaceous ; stamens from its base. 
Ixv. Chenbpodiacea. 
Perianth 3-cleft, scarious. Stamens hypogynous. 
Lsiv. Atnarantkacea. 
Perianth tubular. Stamens perigynous. 
Ixviii. Thymehaceen. 
63 Male flowers in catkins. Seeds in a closed pericarp. 
Ixxvii. Amentiferee. 
