NA.TUEAL ORDERS. 
capsular, with two opposite, parietal placentae. Seeds numerous, 
minute ; embryo erect, in the axis of fleshy albumen. 
Genus. — Conradia. 
485. B1GNONIAOE.E, the Trumpet-flower Tribe. — Trees^ shrubs^ 
or herhs^ often twining or climbing. Leaves opposite, com- 
pound, or occasionally simple. Calyx divided or entire, often 
spathaceous. Corolla irregular, 4:-5-lobed. Stamens 5, unequal, 
or 4 and didynamous ; always 1, sometimes 3 barren stamens 
Ovary 2-celled, with the placentje in the axis. Disk annular, 
or glandular. Capsule 2-celled, 2-valved. Seeds numerous, 
winged, destitute of albumen ; embryo straight. 
Genera. — Bignonia, Catalpa, Gelseminum. 
Sub-order, SssAMiE — has few and wingless seeds; fruit indu- 
rated or drupaceous, often 2 to 4 horned. 
Geneea. — Martynia, Sesamum. 
486. — AcANTHACEiE, the Acanthus Tribe. — Herbs or shrubs. 
Leaves opposite, simple, entire or serrated. Calyx in 4-5 di- 
visions, sometimes cut into many pieces, or entire and obsolete, 
persistent. Corolla mostly irregular; limb ringent or bilabi- 
ate. Stamens 2, sometimes 4, didynamous, shorter ones often 
sterile. Ova/ry seated in a disk, 2-celled, the cells 2 or many 
seeded. Fruit a capsule. Seeds usually supported by hooked 
processes of the placenta, without albumen ; embryo curved or 
straight. 
Genera.— Elytraria, Justicia, Ruellia. 
487. ScROPHULARiACE^, the Figwort Tribe. — ILerbs or under- 
shrubs., sometimes shrubs. Leaves opposite, whorled, or alter- 
nate. Calyx inferior, persistent, divided into 4 or 5 parts, un- 
equal. Corolla more or less irregular and bilabiate, or person- 
ate, aestivation imbricate. Stamens usually 4, didynamous, in 
a single series opposite the sepals. Ovary free, 2-celled. Fruit 
capsular. Seeds numerous, albuminous ; embryo straight or 
slightly curved. This order has been divided into three sec- 
tions: 1, SalpiglossidaB — Inflorescence centrifugal; aestivation of 
the corolla plaited or plaited-imbricate ; the 2 upper segments 
external. 2, Antirrhinidae — Inflorescence centripetal or com- 
pound ; aestivation of the corolla bilabiately imbricated ; the 2 
upper segments being external. 3, Rhinanthideae — Inflores- 
cence centripetal or compound ; aestivation quincuncial or ir- 
regularly imbricated ; one of the lateral segments external, the 
two upper internal. 
a. Properties : acrid and bitter, some species are sedative and poisonous. 
Genera. — 1. SALriGLossio^ — Salpiglossis. 2. Antirrhin^ — Verbascum, An^ir• 
rhinum, Scrophularia, Collinsia, Chelone, Pentstemon, Mimulus, Herpestis, Gratiola. 
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