xlvi 
KEY TO THE NATURAL ORDERS. 
1-4-celled. Fruit dehiscent or indehiscent. — Scapose herbs, with flowers in spikes 
(page 187). 
Primulace.r. Stamens as many as corolla-lobes ; anthers dehiscing longitu- 
denally. Ovary 1 -celled ; placentation free-central. Fruit capsular. — Herbs 
(page 188). 
LXI. Myrsinacese. Stamens as many as corolla-lobes ; anthers dehiscing longi- 
tudinally. Ovary 1 -celled ; placentation free-central. Fruit drupaceous, often 1- 
seeded. — Shrubs, with entire dotted leaves (page 188). 
LXII. Sapotacese. Flowers hermaphrodite. Fertile stamens 1-3 times as many 
as the corolla-lobes, often alternating with staminodia. Ovary many-celled ; 
placentation axile. Fruit baccate, usually by abortion 1 -seeded. — Trees or shrubs, 
with milky juice and entire coriaceous leaves (page 191). 
LXIII. Ebenacese. Flowers dioicous. Stamens indefinite. Ovary 3- or more- 
celled ; placentation axile. Fruit indehiscent. — Trees or shrubs, with entire 
coriaceous leaves (page 196). 
LXIV. Boraginacese. Stamens 5. Carpels 4. Ovules solitary. Fruit dru- 
paceous or 4 dry nucules. — Herbs, with leaves usually rough (page 199). 
LXY. Convolvulaceae. Stamens 5. Ovary 1- 4-celled. Ovules 1-2 in a cell. 
Fruit usually capsular. — Herbs or shrubs, usually twiners, with bell-shaped corollas, 
(page 204). 
LXYI. Solanacese. Stamens 5. Ovary usually 2-celled; placentation axile. 
Ovules numerous. Fruit fleshy or dry. — Herbs or shrubs (page 213). 
* * Leaves opposite. 
LXVII. Oleacese. Stamens 2. Ovary 2-celled ; placentation axile. Fruit 
various. — Shrubs, with exstipulate leaves (page 218). 
LXVIII. Apocynacese. Stamens 5, not adnate to the stigma. Carpels 2, 
free or connate. Fruit drupaceous or follicular. — Shrubs, with exstipulate leaves 
and milky juice (page 221). 
LXIX. Asclepiadaceae. Stamens 5, adnate to the stigma. Carpels 2. Fruit 
two divaricating follicles. — Shrubs or herbs, with exstipulate leaves and milky juice 
(page 225). 
LXX. Lioganiacese. Stamens 4-5. Ovary 2-celled ; placentation axile. Fruit 
dry or fleshy. — Shrubs with entire leaves with intrapetiolar stipules (page 229). 
LXXI. Gentianacese. Stamens 4-5. Carpels 2 ; placentation parietal. Fruit 
usually capsular. — Herbs, with entire exstipulate leaves (alternate in Limnanthemum) 
(page 235). 
* * Ovary superior. Corolla irregular. Stamens usually 4, didynamous. 
LXXII. Scrophulariacese. Ovary 2-celled ; placentation axile. Ovules nume- 
rous. — Herbs or shrubs. Leaves usually opposite (page 236). 
LXXIII. Ij entibulariac e ae . Ovary 1-celled ; placentation free-central. Ovules 
numerous. — Acaulescent pond or swamp herbs (page 242). 
LXXIV. Bignoniacese. Ovary generally 2-celled, with two placentas in each 
cell adnate to the septum. Ovules numerous. — Shrubs, often climbers. Leaves 
usually compound (page 243). 
Pedalineae. Ovary in our plant 1 -celled? with 2 parietal placentas. Fruit a 
rostrate capsule, with many seeds (page 244). 
