CONVOLVULACEAE 99 



3. Convolvulus arvensis L. Small Bind-Weed. 



A common weed in fields and waste places. Grand Island; Lancaster 

 County; Nemaha; Wood River. 



4. Convolvulus hermannioides A. Gray. 

 Nebraska according to Rydberg's Flora of Colorado. 



4. Cuscuta. 754. 



Styles little if any longer than the ovary, usually shorter. 



Flowers sessile, corolla persistent at the base of the capsule. 



Corolla scales large, deeply fringed. 1. C. arvensis. 



Corolla scales small, often reduced to a few teeth. 



2. C. polygonorum. 

 Flowers pedicelled, corolla enclosing or persistent at the summit of 

 the capsule. 

 Flowers 3-5 mm. long. 3. C. indecora. 



Flowers about. 2 mm. long. 



Corolla lobes about as long as the tube, the tips inflexed. 



4. C. coryll. 

 Corolla lobes half as long as the tube, the tips not inflexed. 



5. C. cephalanthi. 

 Styles several times as long as the ovary. 



Flowers pedicelled, with 2-several entire bracts at the base. 



6. C. cuspldata. 

 Flowers sessile, subtended by 8-15 serrulate bracts. 7. C. paradoxa. 



1. Cuscuta arvensis Beyrich. Field Dodder. 

 Fairly common on various herbs. Kearney; Lincoln; Minden; Red 

 Cloud; Sheridan. 



2. Cuscuta polygonum Englem. 

 Cuscuta obtuslflora H. B. K. 



Over most of the state. Bloomington; Callaway; Lincoln; Valentine. 



3. Cuscuta indecora Choisy. Pretty Dodder. 

 On various herbs and shrubs. Crawford; Holt County; Mullen; Red 

 Cloud; Valentine; Wood Lake. 



4. Cuscuta coryli Engelm. Hazel Dodder. 

 On hazel, willow and various herbs. Arapahoe; Chelsea; Dismal 

 River; Long Pine; Thedford. 



5. Cuscuta cephalanthi Engelm. 

 On willows. Kearney. 



6. Cuscuta cuspidata Engelm. 



On Ambrosia trifida and artemesiafolia. Bellevue; Lincoln; Valentine; 

 Whitman. 



7. Cuscuta paradoxa Raf. Glomerate Dodder. 

 Cuscuta glomerata Choisy. 



On Helianthus, Solidago and Asclepias. Arapahoe; Holt County; Kear- 

 ney; Lincoln; Nemaha; Wahoo; Wood River. 



3. HYDROPHYLLACEAE. 



Leaves all alternate. 1. Hydrophyllum. 

 The lower leaves opposite, the upper alternate. 



Stamens included, corolla lobes convolute. 2. Macrocalyx. 



Stamens exserted, corolla lobes imbricated. 3. Phacelia. 



