G Ovary superior,
t Leaves stipulate.
a. Carpels solitary, or several, and then free.
Flowers p a p ilio n a c e o u s ..........................................................................XVI
Flowers regular. Styles 1 to each c a r p e l .................................XVIT.
Flowers regijar. Stigmas 3 -5 . Ovary 1 - o e l l e i l ................................LXII. Pltmljaginex.
Flowers regular. Styles 2. Ovary 2 - c e l l e i......................................XXXVI. Oam iaceoe (Am d o fc tuUm ).
/3. Carpels several, more or less combined.
* 0 \Tiles parietal.
Flowers regular. Leaves with glandular h a i r s ...................................VII. Droseraceæ.
Flowers in-egular. N o glandular h a i r s ....................................V I. Violarkæ.
** Ovules asile or basal.
Leaves opposite, 2 - f o h o la t e ............................................................XXII. Zygophylleæ.
Leaves opposite, s im p l e ....................................................................XIV. Elatineoe.
Leaves alternate, 3 -foH o la te ..............................................................XXL Oxalideæ.
Leaves alternate, simple or pinnate.
Fruit with a long b e a k .................................................................... XX. Geraniaceæ.
Ovary 1-celled, with basal o v u l e s ............................................XXXIII. Portidaceæ.
Ovary 3-5-lobed and-celled, with solitary ovules in each . XXV. Stackliousieæ.
Ovary 3-celled, with 2 ovules in each c e l l ............................LXII.
f t Leaves exstipulate.
a. Carpels several, free.
Stamens hypogj-nous. Carpels 1 -se ed ed ................................................ I. Ranunculacece.
Stamens hypogynous. Carpels 2- or f ew - s e e d e d ........................... IV. Dilleniaceæ.
Stamens hypogjTious. Carpels m a n y - s e e d e d ................................ XXXVI. Cunoniaceæ (Tetracarpæa).
Stamens perigynous. Carpels many-seeded........................XXXIV. Crassulaceæ.
S. Cai-pel solitary.
Flower p a p ü io n a c e o u s ......................................................................................XVI. Leguminosæ.
Flower regular. S h r u b s .....................................................................................XVI. Buettneriaceæ.
Flower regular. H e r b s .............................................................................XXXIII. Foriulaceæ (Calandrinia).
y. Carpels 2 or more, combined into a l- o o -ceUed ovary.
* Styles free, several.
Ovary 1-loeular. Ovules p a r i e t a l XI. Frankeniaeeæ.
Ovary 1-loeular. Ovules b a s a l ..................................................................XII.
Ovary 2-locular. S h r u b s .......................................................................XXXVI.
Ovary 3-locular. S h r u b s ............................................................................LXII.
Ovary 5-Iocular. H e r b s XIII. Lineoe.
** Styles combined into a solitaiy simple one.
. Leaves opposite. Stamens hypogynous. Ovary 4-8-lob ed or
- c e l l e d XXIII. Rutaceæ.
Leaves opposite. Stamens hypogynous. Ovary 2-cellcd , . L. Oleaceæ.
Leaves alternate or whorled.
Anthers 6 (rarely 1 -4 ), 4 longer, opening by slits . . . . V, Cruciferæ.
Anthers 5, opening by slits. Ovaiy I-celled . . . . XXXIII. Foriulaceæ.
Anthers 8 -1 0 , opening by pores. Ovary 2-celled . . . . IX. Tremandreæ.
Anthers 5, opening by pores or slits. Ovaiy 3-5-celIed . . XVI. BueUneriuceæ.
Anthers 5, opening by slits. Ovary 3 -5-c e lled . . . . X. .
KEY TO THE NATURAL ORDERS.
s 4 - 6 , perigynous. Ovary 2-eelied, co-seeded. Calyx
cyUndric. H e r b s ..........................................................................................XXX, Lythrariece.
Stamens 6, perigynous. Ovary 1-celled, ¡».seeded. Calyx
turbinate. S i i r u b s .......................................................... X XXVII. Escallonieis.
Stamens 4 - 5 , perigjuous, opposite petals. Ovary 3-celled,
3-seeded. Calyx flat. S h r a b s ........................................................XXIV.
II. AÍONOPETALOUS.
A. Ovary inferior.
t Flowers (minute) in an involúcrate head.
3, n a k e d .......................................................................................................XLII.
1 1, in a 2-Hpped c u p ................................................................................XLIII. .
f t Flowers not in an involúcrate head.
* Leaves alternate.
Anthers 5, 2-celIed, combined. Stigma not in a cup . . . . XLVI.
Anthers 2, 2-ceUed, combined. Stigma not in a c u p ...............XLV. Stylideoe.
Anthers 5, 2-celled, free, alternate with corolla-lobes. Stigma not
in a c u p ............................................................................................................... X LVII. .
Anthers 5, 2-celled, free, opposite c o r o U a - lo h e s .......................................LXI. .
Anthers 5, 2-celled, free or combined. Stigma in cup . , , . XLIV. Goodeniaceæ.
Anthers 3 -5 , free. 1-ceUed. Filaments combined . . . . XXXII. Cucurhiiaceæ.
* • Leaves opposite or whorled.
Simple, s t ip u la t e .........................................................................................................XLI. Rubiaceæ.
P in n a te ............................................................................................................................... XL. ■
3. Ovary superior. Flowers regular,
t Carpels free, or combined into a deeply lobed ovary.
* Stamens free from corolla.
Hy]jogynous. Leaves o p p o s i t e ...................................................................XXIII.
Perigynous. Leaves alternate ..............................................................................XXA'. <
* * Stamens attached to corolla.
............................................................................................................................lN l .L a H u t x (
Equnl. Anthers Z-celled, opening b j sK l s .............................................. LV. Boragintoe.
Eqnnl. Anthers 2-celletl, opening by p o r e s XLV III. Ericeæ.
Equal. Anthers 1 - c e I l c t l ................................................................................ XLIX. Epacriâeæ.
f t Gaiqiels combined. Ovary not deeply lobed.
* Stamens hypog\-nous.
Anthers 1 - c eU e d ......................................................................................................XLIX. Epecridex.
Antliers 2 - c e I l e d X LVIII. E ricex (P riom te i).
** Stamens inserted on corolla.
a, Corolla-lobes plaited in buds. Leaves alternate.
Capsule f e w - s e e d e d ............................................................................................lW . Convohulaceæ.
Berry many-seeded. Antliers witii p o r es..................................................LVIII. Solaneæ.
Capsule many-seedccl. Anthers with s l i t s ............................................... LII. Getitianeæ.
S- Corolla-lobes twisted or crumpled in bud. Leaves opposite,
Small trees or climbing s h r u b s ................................................................. LI. Apocyneæ.
Erect or decumbent h e r b s ...............................................................................LII. Gentianeæ.