968 CUSCUTACEAE 



linear, the length of the tube, copiously fringed near the top and sparingly on the sides 

 with slender processes : capsules longer than thick, about 2 mm. long, each capped with the 

 rather persistent corolla. [(7. glomerata Choisy.] 



On tall herbs, mainly on Polygona, Ohio to Minnesota, Tennessee and Texas. Summer and fall 



4. Cuscuta arve"nsis Beyrich. Foliage pale yellow, deeper in age. Stems filiform, 

 becoming loosely matted : flowers short-pedicelled in small rather loose clusters : calyx 

 campanulate ; lobes 5, broad, obtuse, barely as long as the corolla-tube : corolla rather 

 campanulate ; lobes 5, lanceolate or triangular-lanceolate, acute or acuminate, as long as 

 the tube, with inflexed tips ; scales ovate or oblong-ovate, as long as the corolla-tube 

 or slightly longer, fringed all around with short irregular processes : capsules spheroidal, 

 2 mm. broad, each seated in the persistent corolla, indehiscent. 



On herbs and low shrubs, New York to the Northwest Territory and California, south to Florida, 

 Texas and Mexico. Summer. 



5. Cuscuta Folygonorum Engelm. Foliage orange-yellow. Stems rather coarse ; 

 branches often loosely matted : flowers sessile or nearly so, in small rather lax clusters : 

 calyx broad ; lobes 4-5, ovate-oblong, acute or acutish : corolla little exserted ; lobes 4-5, 

 triangular or ovate-triangular, longer than the tube, acute ; scales obsolete, usually of 1-3 

 processes on either side of the base of the filament: capsules subglobose, 2.5-3 mm. in 

 diameter, each seated in the persistent corolla. 



On Polygona and other herbs, Pennsylvania to Minnesota, south to Delaware and Arkansas. 

 Summer and fall. 



6. Cuscuta indecora Choisy. Foliage light yellow, deeper in age. Stems rather 

 stout, branched ; branches loosely matted : flowers pedicelled, in loose umbel-like cymes : 

 calyx more or less papillose ; lobes 5, ovate to lanceolate, acute, barely equalling the 

 corolla-tube : corolla white, campanulate, about 3 mm. long ; lobes 5, triangular, erose- 

 crenulate, acute, slightly shorter than the tube, with incurved tips ; scales ovate or oval- 

 oblong, extending nearly to the sinuses, irregularly fringed with short processes through- 

 out : capsules spheroidal, 3 mm. long, acute, each enveloped by the persistent corolla. 

 [C. decora var. pulcherrima Engelm.] 



On herbs and low shrubs, Illinois to Nebraska, south to Florida, Texas and Mexico. Spring and 

 summer. 



7. Cuscuta Cdryli Engelm. Foliage yellowish, or orange in age. Stems coarse ; 

 branches sometimes loosely matted : flowers short-pedicelled, in loose or rather dense 

 umbel-like cymes : calyx-lobes 4-5, triangular or triangular-lanceolate, acutish, about 

 equalling the corolla-tube : corolla campanulate or cylindric-campanulate, about 2 mm. 

 long ; lobes 4-5, triangular or ovate-triangular, about as long as the tube, erose-crenulate, 

 acute, with strongly inflexed tips ; scales small, oblong, rounded at the apex, with few 

 processes on each side : capsules much depressed, 2.5-3 mm. long, each enclosed by or at 

 maturity capped with the persistent corolla. [ C. inflexa Engelm. ] 



On the hazels and other shrubs or shrubby herbs, Virginia to Nebraska, south to Georgia and 

 Arkansas. Summer. 



8. Cuscuta umbellata H.B.K. Foliage pale yellow, slightly deeper in age. 

 Stems filiform ; branches loosely matted : flowers short-pedicelled, in compound clustered 

 cymes, these ending in umbel-like cymes : calyx broadly campanulate ; lobes triangular, 

 acute, as long as the corolla-tube or longer : corolla 3-4 mm. long ; lobes lanceolate, 

 acute, longer than the tube, spreading or reflexed ; scales oval, longer than the corolla- 

 tube, incurved : capsules spheroidal, 1.5-2 mm. broad, 4-lobed, each enclosed by the per- 

 sistent corolla. 



On herbs, Florida to Texas and Arizona, south to Mexico. Spring to fall. 



9. Cuscuta Cephalanthi Engelm. Foliage yellow or yellowish white. Stems rather 

 coarse, seldom matted : flowers short-pedicelled, in rather dense clusters : calyx-lobes 5, 

 ovate, obtuse, shorter than the corolla-tube : corolla pale, about 2 mm. long ; lobes 

 ovate, obtuse or rounded, one-half as long as the tube or shorter, spreading ; scales much 

 shorter than the corolla-tube, oblong or ovate-oblong, fringed mainly near the tip with 

 short irregular processes: capsules subglobose, 3.5-4.5 mm. in diameter, enclosed by or 

 capped with the corolla, which is finally deciduous. 



On shrubs and tall herbs, Pennsylvania to Minnesota and the Northwest Territory, south to Texas 

 and Arizona. Summer. 



10. Cuscuta rostrata Shuttlw. Foliage yellowish white. Stems coarse; branches 

 sometimes loosely matted : flowers pedicelled, larger than those of the other species, in 

 rather loose cymes : calyx-lobes 5, ovate-triangular, about the length of the corolla-tube: 

 corolla white, campanulate, 4-6 mm. long ; lobes 5, ovate, about the length of the tube, 

 obtuse ; scales about \ as long as the corolla-tube, the body linear to spatulate, fringed 



