HYDROPHYLIvACEAE 255 



Flowers sessile or essentially so : corolla persistent around the base of the 

 fruit. 

 Calyx-lobes obtuse : corolla-scales ovate, fringed. 3. C. arvensis. 

 Calyx-lobes acutish : corolla-scales obsolete or of several processes. 



4. C. Polygonorum. 

 Flowers markedly pedicelled : corolla surrounding or capping the fruit or 



deciduous. 

 Capsule depressed : corolla-scales fringed all around. 



5. C. Cephalanthi. 

 Capsule not depressed : corolla-scales fringed mainly near the apex. 



6. C. Gronovii. 

 B. Sepals distinct, accompanied by nearly similar bracts. 7. C. compacta. 



1. Cuscuta Epilinum Weihe. Flax Dodder. ( Man. p. 754 ; I. F- 

 f. 2gs^-) On flax, N. S. to N. J. and Pa. Introd. from Eu. — Pennsyl- 

 vania : Bucks ; Chester ; Lancaster. 



2. Cuscuta Epithymum Murr. Clover Dodder. (Man. p. 755; I. 

 F. f. 2g^7.) Usually on clover, Me. and Ont. to Conn., N. Y., Pa. and 

 S. Dak. Introd. from Eu. — Pennsylvania: Northampton; SusquE. 



HANNA. 



3. Cuscuta arvensis Beyrich. Field Dodder. (Man. p. 755 ; I. F. 

 f. 2g^S.) On various herbs and low shrubs, Mass. to the N. W. Terr., 

 Fla., Tex., Mex. and Calif. — Pejinsylvania : Bucks; Lancaster. 



4. Cuscuta Polygonorum Engelm. SmarT-weed Dodder. (Man. 

 P- 755 ; I- F- f- ^959-) On Polygonum and other herbs, Minn, and Wis. 

 to Neb. and Ark. Also in Pa. and Del. — Pennsylvania : Luzerne ; 

 Lancaster ; Dauphin ; Huntingdon. 



5. Cuscuta Cephalanthi Engelm. Button-bush Dodder. (Man. p. 

 755; I. F./. 2g62.) On shrubs and tall herbs, Pa. to Minn., the N. W. 

 Terr., Tex. and Ariz. — Pennsylvania: Northampton; Lancaster; 

 Dauphin. 



6. Cuscuta Gronovii Willd. Gronovius' Dodder. Love-vine. (Man. 

 p. 755 ; I. F. f. 2C)6j. ) On herbs and low shrubs, N. S. to Man., Fla. and 

 Tex. — Pennsylvania : Northampton ; Bucks ; Chester ; Delaware ; 

 Lancaster ; Franklin ; Huntingdon ; Erie. 



7. Cuscuta compacta Juss. Compact Dodder. (Man. p. 756 ; I. F. 

 f. 2g66. ) On shrubs. Out. to N. Y., Ala., Kans. and Tex. — Pennsylvania : 

 Bucks, Nockamixon ; Delaware, Tinicum. 



Family 3. HYDROPHYLLACEAE Lindl. Water-leaf Family. 



Corolla-lobes convolute in the bud : ovary with well dilated placentae. 

 Calyx not accrescent : stamens exserted. i. Hydrophyllum. 



Calyx accrescent : stamens included. 2. Macrocalyx. 



Corolla-lobes imbricated in the bud : ovary with very narrow placentae. 



3. Phacelia. 

 1. HYDROPHYLLUM L. 

 Leaf-blades pinnatifid or pinnately lobed. 



Calyx unappendaged : lobes linear. i. H. Virginicum. 



Calyx with reflexed appendages at each sinus ; lobes lanceolate. 



2. H. appendiculatum. 

 Leaf -blades palmately lobed. 3. H. Ca7iadense. 



