lOO Gentianaceae — Polemoniacese. 



\N.—CHLORA. 



CHLO'RA PERFOLIA'TA (60). Yellow Centaury. 6—9. Stem 

 (966) erect 6—12 in., leaves ovate connate at the base, flowers bright yellow 

 in cymes, corolla rotate usually S-cleft, stamens usually 8, ovary 

 i-celled many-seeded, style persistent, stigma trifid. Chalky pas- 

 tures. 



V. —LIMNANTHEMUM, 



Limnan'themum nymphaeoi'des (10). 7 — 8. Stems long, leaves alternate 

 (980) peltate or cordate floating, flowers bright yellow in sessile umbels, 

 corolla rotate i in. diameter, usually 5-cleft, ovary i-celled, style per- 

 sistent, stigma lobed. [R. C, 



ORDER 47. — Polemoniaceae. 



Calyx gamosepalous inferior. Corolla gamopetalous 5-cleft regular. 

 Stamens 5 inserted on the corolla-tube. Ovary 3 -celled. Stigma trifid. 



I. ^POLEMONIUM, 



Polemo'nium caeru'leum (5). Jacob's ladder. 6 — 7. Leaves alternate 

 (98 [) pinnate, flowers blue or white corymbose, corolla \ — i in. diameter 

 campanulate, stem i — 2 ft. high. Frequent in gardens. 



[G. {Gordale), M. St. 

 The Phlox of gardens and Cobcea of greenhouses belong to this Order. 



ORDER 48. — Convolviilaceae. 



Calyx polysepalous inferior of 5 sepals imbricated. Corolla gamopetalous 

 regular deciduous, limb 5-angled and plaited. Stamens 5 inserted at the base 

 of the corolla-tube alternate with its segments. Pistil syncarpous of 2 carpels. 

 Ovary 2-celled. Style I . Stigma cleft. Slender often twining herbs with 

 alternate exstipulate leaves. 



Leafy plants, . Convolvulus L 



Leafless parasites, Cuscuta II. 



I. — CON VOL VUL US. 



Slender twining herbs, leaves alternate cordate or sagittate, sepals 5 

 distinct, corolla campanulate 5-angled, stamens 5, ovary 2-celled, style 

 filiform, stigmas 2. 



Bracts small linear, placed low on peduncle, . . C. arvensis. 



Bracts large, enclosing the calyx, 408 



408 Leaves sagittate, C. sepium. 



^08 Leaves reniform, C. Soldanella. 



