LINNJ^AN CLASS XIII. 185 



Illicium, Sepals 3 — 6, petaloid. Petals numerous, interior ones 

 smallest. Carpels numerous, arranged in a circle, follicular. Mayno- 

 liaccce, 2. 



Ashnina. Sepals 3. Petals 6, the 3 outer ones larger. Carpels 

 oblong, pulpy within, several-seeded. (Papaw.) Anonacete, 3. 



Brasniia. Sepals 3 — 4, persistent, petaloid. Petals 3 — 4, longer 

 than the sepals. Carpels numerous, 1 — 2-seeded. Cabombacece, 7. 



Nelumbium. Sepals 4 — 6, petaloid. Petals numerous. Filaments 

 petaloid. Disk remarkably developed. Ovaries lodged in separate 

 cavities. Fruit a nut. Nelumbiacece, 8. 



The remaining genera of this order, viz., Hepatica, Ranunculus, Ado- 

 vis, Hydrastis, Clematis, Thalictrum, Anemone, Caltha, Isopyrum, and 

 IVautvetteria, will be found under the Natural Order Hanunculacece, 1. 



CLASS XIII.— DIDYNAMIA. 

 Order I.— GYMNOSPERMA. 



Plants with bi-labiate corolla, 4 nuts in the bottom of the calyx, form 

 the first order of this class. It is a part of the Natural Order Labiatce, 

 No. 91, to which the student is referred. Verbena is referred to Verbe- 

 nacece, Order 92. 



Order II.— ANGIOSPERMA. 



Obolaria. Calyx 2-parted, in the form of bracts. Corolla campanu- 

 late, 4-cleft, segments equal, entire, or crenulate. Carpels 1-celled, 

 2-valved, many-seeded. Gentianacece, 82. 



Lantana. Calyx 4- toothed. Corolla with the limb 4-cleft. Stamens 

 4, didynamous. Flowers in heads. Fruit a drupe, 2-celled. Verbe- 

 nacece, 92. 



Zapania. Calyx 5-toothed. Corolla 5-lobed. Stamens 4, didyna- 

 mous. Flowers in heads. Seeds 2, the membranous pericarp disap- 

 pearing. Verbenacea:, 92. 



Orobanche. Conopholis. Anoplanthus. Calyx 4 — 5-cleft. Segments 

 unequal. Corolla ringent. Capsule ovate, 1-celled, many-seeded. 

 Orobanchaceie, 89. 



Epipherius. Calyx short, 5-toothed. Flowers polygamous, upper ones 

 sterile, lower ones fertile. Capsule truncate, oblique, 1-eelled. Oro- 

 banchacece. 89. 



Bignonia, Tecoma. Calyx obscurely 5-cleft, cup-shaped. Corolla 

 campanulate, 5 lobed, ventricose beneath. Stamens 4, didynamous. 

 Pod 2-celled, seeds with membranaceous wings. Birjnonacecc, 83. 



Ruellia. Hygrophyla. Calophanes. Diptericanthus. Cryphiacanthus. 

 Calyx 5-parted, often with 2 bracts. Corolla campanulate, with a 

 6-lobed border. Stamens 4 — 5. Capsule tapering, seeds few. Aca7i- 

 thacete, 93. 



Martynia. Calyx 5-cleft. Corolla bilabiate. Limb 5-lobed. Sta- 

 mens 4, didynamous. Ovary spuriously 4-celled. Fruit ligneous, ter- 

 minated by a hooked beak. Bignonacece, 83. 



The remaining genera of this order belong to the Natural Order 

 Scrophulariaceo'., No. 90. 



