COSCUTACEAE (DODDER FAMILY) 391 



5. Cuscuta arvensis Bejodch, Hook. Fl. Bor. Am. 2:,77> 1834. Stems 

 pale' and slender, low; flowers sessile or nearly S6, small, about 2 mm. long: 

 calyx-lobes obtuse, broad: corolla-lobes acuminate, 'longer than the tube, 

 the tips' inflexed; scales large, deeply fringed all around with irregular fila- 

 ments: ovary and capsule depressed-globose, its base encircled ty the wither- 

 ingcoroUa : styles not longer than the capsule.^Not frequent; various low plants 

 as hosts; from our range to the Atlantic States. 



6. Cuscuta Polygonorum Eng^lm. Am. Journ! Sci. 43: 342. 1842. Stems 

 coarse, orange-yellbtw: flowers crowded, sessile: calyx 4-5-lobed; its lobes 

 ovate-acute: Corolla-lobes triangular-ovate, as long or longer than the'tube; 

 scales reduced, 2-cleft, or often nearly wanting: capsule depressed-globose, 

 the withering corolla persistent at its base. — On Polygonum and other 

 herbs. • , - . ! . 



7. Cuscuta plattensis A. Nels. Bull. Torr. Bot. Club 26: 131. 1899. Stems 



Sellowish-green, moderately slender: flowers in either loose or dense, panicu- 

 ite cymes, short-pediceled: calyx-lobes obtuse, suborbicular, somewhat ex- 

 ceeding 1 mm. in length, the tube very short: corolla marcescent at the base 

 of the capsule; the lobes short'oyate,,. obtuse, about half the length of the 

 broadly campanulate tube; tube about 2 mm. long; scales shorter than the 

 tube, broadest at the truncate fringed summit: styles distinct, but sligKtly 

 unequal, scarcely more than 1 mm. in length and not more than one fourth 

 the length .of J t^ej mature capsule: capsule subglobose, 5 mm. in diameter. 

 T^OniGWndeKo) Solidago, and Helianthus; Wyoming. 



8. Cuscuta Cephalanthi^Engehn. Am. Joum. Sci. 43: 336. 1842. Steins 

 coarse and yellow, mostly high-climbing: flowers in paniculate, often com- 

 pound, cymes, very small, about 1,5 mm. long, on short thick pedicels, often 

 4-merous^calyx-l(5bes obtuse: corolla cylindric-campanulate; the lobes obtuse, 

 half as long as the tube ; scales shorter than the tube- irregularly fringed around 

 the sumnoit: capsule depressed-globose,; styles slender, as long as the ovary, 

 the marcescent 'Corolla capping the large 'capsule .^On talliherbs aiid shrubs. 



9. Cuscuta indeCora Cnoisy, Mem. Sdc. Gen. 9: 278. 1842. Stems coarse: 

 flowers 3 mm. long, cymose, rather long-pediceled: calyx-lobes 5, ovate- 

 lanceolate, acute: corolla campanulate; the lobes subcrenate, triangular, as 

 long as the tube, spreading but with inflexed tips; scales ovate, irregularly 

 fringed all around: capsule oblong, acute. — On low herbs and shrubs; fre- 

 quent on alfajfa. , i. , I 



lOi Cusciita' Coryli Engelin. Am. Joum. Sci.'43r 337,' 184'2. Siems coarse: 

 flowers about 2 mm. lo'n^, in cymes, on pedicels of variable leii'gth:, calyx 

 4-S-lobed; the loTjes . triangular-acute, as long as the cbroUaTtube: corolla 

 campanulate; the' lobes creriulate,"acute,ab'6ut as long as the tube, the tips 

 inflexed; scales small, oval, fringed on the sides sparingly or not at all: cap- 

 sule pointed, longer than the styles, covered or capped by ithe withered corolla,, 

 — On hazels, and other shrubs. 



11. 'Cuscuta megalocarpa Rydb. Bull. Torr. Bot. Club 28: 501. 1901. 

 Stem stout, usually over 1 mm. in diameter: flowers ' in dense globular 

 clusters; ji'edicels' very short, at most 2 mm. long: calyx igamosepalous, lobes 

 rounded, scarcely 1 mm. long: corolla. about 3 mm. high and broad; lobes 

 broadly triangular, acutish, about 1 mm. long, ■with incurVed tip; fringed 

 scales attached near the bottom, deeply 2-lobed, and fringed only in the, open 

 sinuses: stamens about, as long as the lobes of the corolla; filaments subulate, 

 about twice as long as the roimded anthers: Style distinct, short; stigmas 

 capitate: capsule 5-6 mm. an diameter, acute-globose, about 4-seeded. — On; 

 willows and other shrubs; Colorado and -Wyoming. •' 



12. Cuscuta umbellata H.B.K. Nov. Gen. &> Sp. 3: 121. 1815. Stems low 

 and capillary: flowers 3-4 mm. long, few together in umbel-like clusters, 

 usually shorter than their pedicels: acute calyx-lobes and lanceolate-subtilate 

 lobes of the corolla longer than its shallow' tube: scales deeply fringed anil 

 exceeding the tube: capsule more or less regularly circlimscissije, usually 

 capped by the remains of the corolla. — Dry places; on low herbs (Portiildca, 

 etc.);, Colorado and southward. 



