Cuscuta. COXVOLVULACE^. 223 



184, t. 4, fig. 1, & DC. 1. u. ; Engelm. Cuse. 510. C. paradoxa, Eaf. 1. c. ? Lepidanche com- 

 positarum, Engelm. in Am. Jour. Sci. xliii. 344, fig. oO-:J.j. — Wet prairies, Ohio to Wisconsin, 

 Kansas and Texas, mostly on Helianthus, Vernonia, and other tall Compositce. The rope-like 

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

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

 name, which probably belongs here. 



* * (EuGitAMJiiCA, Engelm. Cusc. 476.) Capsule move or less regularly circumscissile, usually 

 capped by the remains of the corolla : styles capillary and mostly much longer than the depre>5ed 

 ovary. 



•i^ Lobes of the corolla acute. 

 C. odontolepis, Sngelm. Stems slender: flowers conspicuous (24 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. — Case. 486. ^ Arizona, 

 Wright, on Amnranthis. 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 much shorter tlian the slender tube : scales incisely dentate and much shorter than 

 the tube. — Jlountains of W. Texas, on a prostrate Euphorbia (cdbo-marginala), Wriijld. 

 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-lubes 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. — Xov. Gen. i Spec. iii. 121; 

 Engelm. Cusc. 4»7. — Dry places, on low herbs {Portulaca, &c.), from S. E. Colorado to 

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



^— -4— Lobes of the corolla broad and obtuse. 

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

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

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

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

 Cusc. 47!). — On weeds, such as Ambrosia, Mirabilis, oic, S. Arizona, Wright. Glomerules 

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

 C. Ajiericaxa, 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 sliort 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 calj-x and small corolla, is here characterized be- 

 cause it may be looked for iu South Florida. 



§ 2. MoNOGYXELLA, Engelm. 1. e. .Styles united into one : stigmas capitate : 

 capsule circumsci.~sile. — Monogynella, Desmoulins. (Consists of few species, of 

 the largest size, mostly Asiatic, extending to Europe, S. Africa and X. 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 teetli : styles two-thirds united. — 

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

 Texana, CImis crassifolia. Live Oak, &c. Stems a hne or two thick, climbing 10 to 20 feet 

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



§ 3. El'Ccscuta. Engelm. 1. c. .S'vles distinct, equal, bearing elongated 

 stigmas : capsule circumscissile. (Old-^^'orld species.) 



C. EpfLixuM, 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 



