HYDROPHYLLA.CEAE 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. compacla. 



1. CuBCUta Epilinum Weihe. Fi<Ax Dodder. ( Man. p. 754 ; I. P- 

 f. 2956.) 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. _/. 29S7-) 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. E. 

 f. sgsS.') On various herbs and low shrubs, Mass. to the N. W. Terr., 

 Fla., Tex., Mex. and Calif. — Pennsylvania : Bucks ; L,ancaster. 



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

 P- 755 ; I- P- 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. CuBCuta Cephalanthi Engelm. Button-bush Dodder. (Man. p. 

 755 ; I. F./. 3g63.) 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. /. 2963. ) On herbs and low shrubs, N. S. to Man., Fla. and 

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

 Lancaster ; Franklin ; Huntingdon ; Erie. 



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

 f. 2966. ) On shrubs, Ont. to N. Y., Ala., Kans. and t^^.— Pennsylvania : 

 Bucks, Nockamixon ; Delaware, Tinicum. 



Family ?,■ 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. appendiculaium. 

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



