Cuscuta. CONVOLVULACE^. 223 



184, t. 4, fig. 1, & DC. 1. c. ; Engelra. Cusc. 610. C. paradoxa, Raf . 1. c. ? Lepidanche com- 

 positarum, Engelm. in Am. Jour. Sci. xliii. 344, fig. 30-35. — Wet prairies, Ohio to Wisconsin, 

 Kansas and Texas, mostly on HeUanthus, Vernonia, and other tall Composiice. The rope-like 

 twists, half to three-fourths inch thick, of white flowers with golden yellow anthers im- 

 bedded in a mass of curly bracts, have a singular appearance and justify Rafinesque's 

 name, which probably belongs here. 

 * * (EuGRAMMiCA, Engelm. Cusc. 476 ) Capsule more or less regularlv circumscissile, usually 



capped by the remanis of the corolla: styles capillary and mostly much longer than the depressecl 



ovary. 



•i~- Lobes of the corolla acute. 

 C. odontolepis, Engelm. Stems slender: flowers conspicuous (2| to 3 lines long), on 

 short pedicels in large clusters : lobes of the campanulate calyx and of the tubular corolla 

 ovate, acute, rather shorter than the cylindrical tube: scales hardly reaching to the base 

 of the anthers, incisely dentate toward their rounded apex. — Cusc. 486. — Arizona, 

 Wright, on Amaranthus. A large-flowered species, distinguished from the large-flowered 

 Mexican forms of C. corymbosa by its circumscissile capsule. 

 C. leptantha, Engelm. 1. c. Stems low and capillary : flowers (2 to 2J lines long), 

 4-merous, on slender fascicled pedicels : papillose calyx and lanceolate lobes of the 

 corolla mucli shorter than the slender tube : scales incisely dentate and much shorter than 

 the tube. — Mountains of W. Texas, on a prostrate Euphorbia (albo-marginatd), Wright. 

 The only N. American species (as far as known) with uniformly 4-merous flowers. 

 C. umbellata, HBK. Stems low and capillary : flowers (li to 2 lines long) few together 

 in umbel-like clusters, usually shorter than their pedicels : acute calyx-lobes and lance- 

 olate-subulate lobes of the corolla longer than its shallow tube : scales deeply fringed and 

 exceeding the tube : styles mostly little longer than the ovary. — Nov. Gen. & Spec. iii. 121 ; 

 Engelm. Cusc. 487. — Dry places, on low herbs (Portulaca, &c.), from S. E. Colorado to 

 Texas and Arizona. (Mex., &c.) 



-t— -f— Lobes of the corolla broad and obtuse. 

 C. applanata, Engelm. Stems low and slender : flowers (a line or rather more in 

 length) clustered on sliort pedicels: rounded lobes of calyx and corolla thin in texture, as 

 long as the wide and shallow tube : scales deeply fringed, often exceeding tlie tube : styles 

 scarcely longer than the ovary : marcescent corolla enveloping the depressed capsule. — 

 Cusc. 479. — On weeds, such as Ambrosia, Mirabilis, &c., S. Arizona, Wright. Glomerules 

 3 or 4 lines tliick, often strung together like beads. Capsule much broader than high. 

 C. AmericAna, L. (Sloane, Jam. 85, & Hist. i. 201, t. 128, fig. 4, and the plant in herb. L.) 

 Coarse stems climbing high : flowers (a line or two long) very abundant, on short pedicels in 

 globose clusters : calyx globular-cupulate, almost enclosing the corolla; the lobes of which 

 are much shorter than the slender tube : anthers globular and almost sessile : scales short, 

 more or less dentate : seed usually solitary. This S. American and West Indian species, 

 easily known by its proportionally large calyx and small corolla, is here characterized be- 

 cause it may be looked for in South Florida. 



§ 2. MoNOGYNELLA, Engelm. 1. c. , Styles united into one : stigmas capitate : 

 capsule circumscissile. — Monogijnella, Desmoulins. (Consists of few species, of 

 the largest size, mostly Asiatic, extending to Europe, S. Africa and N. America.) 



C. exaltata, Engelm. Stems thick, climbing high : lobes of the fleshy calyx and corolla 

 orbicular, the former covering and the latter half the length of the corolla-tube : anthers 

 sessile : scales small, bifid or reduced to a few lateral teeth : styles two-thirds united. — 

 Cusc. 513. — S. W. Texas, from the Colorado to the Rio Grande, on trees, such as Dioxpyros 

 Texana, Ulmus crassifolin, Live Oak, &c. Stems a line or two thick, climbing 10 to 20 feet 

 high. Elower 2 lines long. Capsule 3^ to 5 lines long. 



§ 3. Edcuscuta, Engelm. 1. c. Styles distinct, equal, bearing elongated 



stigmas: capsule circumscissile. (Old- World species.) 



C. EpfLiNUM, Weihe. Stems slender, low: globular flowers (half line long) sessile in dense 

 heads : corolla short-cylindrical, scarcely exceeding the broadly ovate acute calyx-lobes, 

 surrounding the capsule,: scales short and broad, denticulate: stigmas longer than the 



