SYMPETALAE 55 



613. Corolla scanous, regular, 4-lübed. Stamens 4. Stigma i. Fruit opening 



by a lid. Seeds albuminous. , . Planlago, 218. Plantaginaceae. 

 Corolla not scarious, more or less irregular, rarely regular, but then sta- 

 mens 2 or stigmas 2 614 



614. Corolla regular. Stamens 2, alternating with the ovary-cells. Disc 



wanting. Seeds with scanty albumen. Shrubs. Leaves compound, 

 . but sometimes with a single leaflet. . . Jasminum, 197. Oleaceae. 

 Corolla more or less irregular, rarely regular, but then stamens 4. Leaves 



simple 615 



615. Flowers regular. Stamens 4. Anthers opening by two slits. Style 2- 



cleft. Fruit capsular. Seeds exalbuminous. Low shrubs. Leaves 



alternate Wellstedia, 204. Borraginaceae. 



Flowers more or less irregular. Leaves opposite or whorled, rarely 

 alternate, but then anthers opening by a single slit or pore. . . 616 



616. Leaves alternate, at least the upper ones. Anthers opening by a single 



slit or pore. Seeds albuminous. . . . 208. Scrophulariaceae. 

 Leaves opposite or whorled 617 



617. Fruit a capsule. Seeds borne on a hook-like process of the funicle, exal- 



buminous. 216. Acanthaceae. 



Fruit a drupe or a nut. Seeds not on a hook-like process of the funicle, 

 albuminous. Stamens 4. Anthers opening by two slits. Herbs. 



205. Verbenaceae. 



618. (611.) Flowers distinctly irregular. Stamens united at the base with one 



another and with the corolla. Anthers opening by a single pore. 



120. Polygalaceae. 

 Flowers i-egular or nearly so. Anthers opening b}^ two slits or pores. 619 



619. Flowers unisexual. Stamens free from the corolla. 122. Euphorbiaceae. 

 Flowers hermaphrodite. Leaves undivided 620 



620. Calyx and corolla of 2 — 4 divisions each. Stamens 6 — 8, free from the 



corolla or nearly so. 189. Ericaceae. 



Calyx and corolla of 5 divisions each. Stamens 5, attached to the corolla ; 

 filaments free. Stigmas 2 200. Apocynaceae. 



621. (605.) Ovules 2 in each cell of the ovary 622 



Ovules 3 or more in each cell of the ovary 640 



622. Fertile stamens 2 — 3 623 



Fertile stamens 4 — 30 626 



623. Flowers regular. Stamens 2, alternating with the ovary-cells, rarely 3. 



Disc wanting 197. Oleaceae. 



Flowers more or less irregular. Stamens not regularly alternating with 

 the ovary-cells 624 



624. Leaves stipulate, alternate. Style 2-cleft. Petals 2-cleft. Seeds ex- 



albuminous. Trees or shrubs. . Tapura, 121. Dichapetalaceae. 



Leaves exstipulate, opposite or whorled, rarely alternate, but then, as 



nearly always, style simple 625 



