- CONVOLVULUS CONVOLYVULACE 495 
CUSCUTA 
of the narrower inner ones: corolla 12-18 lines broad, yellowish: stigmas 
oblong, On dry prairies, southern Oregon to California. 
* * * Stigma filiform or narrowly linear: no bracts at or near the 
base of the calyx. 
C... arvensis L. Sp. 153. Glabrous or nearly so; stems trailing or de- 
cumbent, very slender, 1-214 feet long, simple or branched : leaves slender- 
petioled, ovate or oblong, entire, obtusish and mucronulate or acutish at 
the apex, sagittate or somewhat hastate at the base, 1-2 lines iong, the 
basal lobes spreading acute: peduncles 1-4-flowered (commonly 2-flower- 
ed), shorter than the leaves, 1-5-bracted at the summit, usually with an- 
other bract on one of the pedicels: sepals oblong, obtuse, 1!¢ lines long: 
corolla pink to white, 8-12 lines broad. In fields and waste places. Nat- 
uralized from Europe. 
Tribe 2 Cuscuter B & H. Gen. ti, 881 Leafless parasitic red 
or yellow twining herbs without foliage or green color, Corolla imbri- 
cated in the bud, appendaged below the stamens. Ovary entire. 
2 CUSCUTA Tourn. L. Gen. n. 170. 
Parasitic herbs, destitute of all green color and of foliage, except 
scale-like bracts, and small whitish flowers in cymose clusters. 
Calyx 5- (rarely 4-) parted or cleft. Corolla from campanulate 
or somewhat urceolate to short-tubular, with the mostly spreading 
lobes between convolute and imbricate in the bud, not plicate, 
marcescent persistent, either at the base or summit of the capsule. 
Stamens inserted in the throat of the corolla above as many scale- 
like lacerate appendages (these rarely absent). Ovary globular, 
2-celled and 4 ovuled. Styles distinct or rarely united, persistent: 
stigmas globose, or in foreign species filiform. Capsule 1—4-seeded, 
circumscissile or transversely bursting, or indehiscent. Seeds 
large, globular, or angled by mutual pressure. Embryo filiform, 
spirally coiled in firm-fleshy. albumen, wholly destitute of co- 
tvledons, but the apex of the plumule often beariug a few alternate 
scales. Seeds germinating in the ground but not rooting in it, 
developing into filiform branching stems which twine dextrorsely 
upon herbs or shrubs and becoming parasitic by means of suckers 
which penetrate the bark in contact, the base soon dying. 
C. arvensis Beyrich. Stems pale yellow, slender, low: flowers barely 
a line long, nearly sessile, in small dense clusters: calyx gamosepalous, 
with obtuse mostly broad lobes: corolla nearly campanulate, 5-lobed, the 
lobes acute or acuminate, as long as the tube; its scales large, ovate, as 
long as or longer than the tube, densely fringed all around with short ir- 
regular processes: style shorter than the ovary: stigmas capitate: capsule 
depressed-globose, indehiscent, the withering corolla and usually the sta- 
mens persistent at its base. On various low plants, Brit. Columbia to 
California and across the Continent. 
C. Cephalanthi Engelm. Am. Journ. Sci. xxxxiii, 336. Stems coarse 
and yellow, usually rather high-climbing: flowers a line or less long, on 
short thick pedicels,, often 4-merous: calyx-lobes ovate, obtuse, shorter 
than the corolla-tube: corolla cylindric-campanulate, its lobes ovate, ob- 
tuse and rounded, spreading, shorter than the tube: scales shorter than the 
tube, fringed: style slender, as long or longer than the ovary: capsule 
