72 ILLINOIS BIOLOGICAL MONOGRAPHS [162 



in 1910). California (Kellog & Harford 779), San Francisco Bay (Hall 5721), Palo Alto 

 (Baker 41, the type, in the N. Y. Bot. Gard. Herb.), Mendocino Co. (McMurphy 54), 

 Santa Clara Co. (Elmer 1757), San Francisco (Bolander 2491), Bucksport (Tracy 3551), 

 Mariposa (Congdon in 1901), Eureka (Hitchcock in 1915), Santa Cruz Mts. (Hitchcock 188), 

 Humboldt Bay (Tracy 1256), San Diego (Brandegee, Berg in 1904), Head of San Joaquin 

 Valley (Burtt-Davy 1966), San Mateo Co. (Abrams in 1906), Coronado (Berg in 1904), 

 West Berkeley (Michener & Bioletti in 1891, Burtt-Davy in 1896, King in 1894), Los Angeles 

 Co. (Chandler 2043), San Diego Co. (Parish 2281), Oakland (Congdon in 1904). 



Cuscuta salina acuminata n. var. 

 [Figures 32 f-g and 89] 



Perianth divisions lanceolate, acuminate. Scales apparently nearly- 

 absent or reduced to a very few lateral projections. 



Type location: On an island of a mountain lake, Skamania Co., 



Washington. 



Specimens examined: United States: Washington; Skamania Co., on an island of a 

 mountain lake (Suksdorf 1487, the type, in the U. S. Nat. Herb, as sheet 49,803). California; 

 southeastern part (Purpus 5678). 



Subsection lepidanche Engelmann 

 Cuscuta § Lepidanche Engelmann, Trans. Acad. Sci. St. Louis, 1:509, 1859. 



Flowers pedicelled or sessile in compact clusters; calyx lobes free, 



surrounded by subtending bracts. 



Key to the species 

 Flowers pedicelled, loosely paniculate, bracts numerous or few in the inflorescence, usually 



at least one subtending each flower C. cuspidata (p. 72). 



Flowers sessile in more or less dense clusters. 



Bracts acute, closely appressed C. squamata (p. 73). 



Bracts acute, squarrose C. glomerata (p. 74). 



Bracts obtuse, closely appressed C. compacta (p. 75). 



Cuscuta cuspidata Engelmann 

 [Figures 49, 105 and 134] 



C. cuspidata Engelmann, Bost. Journ. Nat. Hist., 5:224, 1847; and in Trans. Acad. Sci. 

 St. Louis, 1:502, 1859— Matthew, Bull. Torr. Bot. Club, 20, pi. 165. fig. 8, 1893 — 

 Britton & Brown, Illustr. Flora, 3:30, fig. 2965, 1898; 2 ed., 3:51, fig. 3451, 1913. 



C. cuspidata pratensis Engelmann, Bost. Journ. Nat. Hist., 5:224, 1847. 



C. cuspidata humida Engelmann, Bost. Journ. Nat. Hist., 5:224, 1847. 



Stems medium. Flowers glabrous, about 4 mm. long, pentamerous, 

 membranous, pedicelled or subsessile in loose or dense panicled clusters, the 

 whole inflorescence more or less bracteate; calyx of distinct or very slightly 

 united segments, subtended by one or two ovate, orbicular, obtuse, some- 

 times cuspidate bracts, sepals of similar shape, obtuse or cuspidate, some- 

 what glandular thickened along the median portion and with the edges 

 more or less serrulate; corolla funnel shape; lobes oblong, shorter than the 

 tube, obtuse or with a mucronate or cuspidate tip, usually with a row of 

 glandular cells along the median portion; scales oblong, shorter than the 

 tube or reaching the filaments, fringed with medium length processes, 



