248 DICOTYLEDONOUS PLANTS. 



upon the 5 teeth or valves which close the orifice of the corol. 

 Anthers incumbent. Pentandria. Monogynia. 



P. reptans Linn. : stem erect, branched, smooth ; leaves pinnate, 

 mostly by sevens ; leafets ovate-lanceolate, acute ; flowers terminal, 

 nodding. 



HAB. Hills. N. Y. to Car. W. to Miss. May. V.Stem a 

 foot high. Flowers blue, somewhat corymbose. 



Jacob's Ladder. 



ORDER LXXXIII. CONVOLVULACEjE. Lind. 



Calyx 5-divided, persistent. Corol deciduous, regular, 5- 

 lobed ; aestivation usually plicate. Stamens 5, inserted into the 

 base of the corol, alternate with its segments. Torus discoid. 

 Ovary free, with 2 4-cells, seldom with 1 ; ovules erect, 

 definite, when more than 1 collateral ; style 1, sometimes en- 

 tire, usually bifid, rarely 2 ; stigmas obtuse or acute. Cap- 

 sule with from I 4-cells ; the valves fitting at their edges to 

 the angles of a loose dissepiment, bearing the seeds at the 

 base, sometimes valveless or dehiscing transversely. Seeds 

 at the base of the placentae ; albumen mucilaginous ; embryo 

 curved ; cotyledons shrivelled ; radicle inferior. 



Herbs or shrubs, usually twining and with a milky juice. 

 Leaves alternate, without stipules. 



1. CONVOLVULUS. Linn. Spreng. 



Calyx 5-parted, naked or with 2 bracts at base. Corol fun- 

 nel-form or campanulate, with 5 plaits. Stamens 5, shorter 

 than the limb. Ovary 2 3-celled ; cells 2-seeded. Style 

 undivided. Stigma capitate, lobed or divided. Capsule 

 valved, 1 4-celled. Pentandria. Monogynia. 



OBS. I concur with Sprengel in uniting Jpomota with this genus ; 

 which can scarcely be distinguished, except perhaps, by its simple 

 stigma a character too unimportant for the basis of a generic dis- 

 tinction. 



1. C. arvensis Linn. : stem climbing ; leaves saggitate, with acute 

 lobes ; peduncles mostly 1 -flowered ; bracts minute, remote from the 

 flower. C. sagittifolius Mich, f 



HAB. Fields. Maine to Car. rare. June, July. If. Stem 



hairy, often prostrate. Leaves rather hastate. Floicers white, 



t an inch long, on axillary peduncles ; which are longer than the 



leaves. This plant has been found on the banks of the canal 



near this city. 



