336 Monography of the North American Ctiscutinece. 



regularly 4-parted, in others nearly always 5-parted. The calyx 

 is constantly monosepalous, deeply and somewhat irregularly 4 

 to 5-parted, and persistent. 



The corolla is cylindric, urceolate, or campanulate, with the 

 limb erect, campanulate, spreading or refiexed, and together with 

 the stamina either persistent at the base of the capsule, or more 

 frequently separated from its insertion and covering its summit. 

 Its texture is in some species nearly membranaceous, in others 

 thicker and more fleshy. 



The stamina are united with the tube of the corolla up to the 

 base of the segments. Near their base, within the tube of the 

 corolla, they bear a scale which is evidently not a distinct organ, 

 but only an appendage of the stamina. They are present in all 

 the species which I have examined ; sometimes consisting only 

 of one or few teeth on both sides of the filament, (as in C, Co- 

 ryli,) but commonly forming a distinct lamina. In some they 

 are bifid, in others undivided ; but in all either crenulate or fim- 

 briate, or laciniately or pinnatifidly divided. They are erect and 

 appressed to the tube in several species ; while in others they are 

 convergent, closing the tube and including the ovary. 



The ovary is always 2-celled, 4-ovulate ; the styles two, (in a 

 single species united into one, ) frequently unequal in length ; in a 

 few cases supported by a stylopodium. The stigma is either fili- 

 form, as in the European, or capitate, as in the American species. 



The capsule is globose or depressed, crowned by the persistent 

 styles and stylopodium (when the latter is present) ; it is 2-celled, 

 and sometimes 4-seeded ; but more generally by abortion, 3-, 2-, 

 and even 1-seeded. In the European species, it separates by cir- 

 cumcision from its base, leaving the dissepiment persistent on the 

 calyx. In the American, the capsule does not appear to open 

 regularly, but it separates easily from the calyx when ripe. 



I have seen very few abnormal irregularities in the flowers of 

 Cuscuta. Sometimes one or moi'e segments of the corolla are 

 partially or entirely changed into a stamen, and the capsule is 

 occasionally 3-4-carpellary, instead of 2-carpellary. 



1. Cuscuta Cephalanthi, n. sp. 



Stem high, branching ; flowers somewhat pedunculate, mostly 

 5-parted ; tube of the corolla cylindric, (after flowering ventri- 

 cose,) twice the length of the obtuse speading segments, and of 



