APPENDIX. 471 



CUSCUTA. 



The followiug species belonging to tliis genua have been found within the limits of the United States 

 and are here arranged and distinguished nearly as by Dr. Geoegb Engeljiann in his revision of the 

 genus, published in the Transaciions of the Academy of Sdenoe of St. Louis, Vol. I., pp. 453-52.3, (1859.) 



§ 1. EU6EAMMICA, Eng. Styles uuequal, capillary ; capsule bursting transversely, more or less 

 regularly. Stems filiform or capillary. 



• Calyx- and corolla-lobes ovate, obtuse ; flowers short ; capsule irregularly ciroumscissile. 



1. C. APPLANATA, Eug. Flowers 1-li" long, short-pedicelled or subsessile in dense often continuous 

 clusters ; lobes of the campanulate calyx equaling the broad campanulate corolla- tube and the spreading 

 at length reflexed corolla-lobes ; anthers oblong, equaling the short subulate filaments ; scales large, 

 wavy-laciniate, incurved ; styles exserted ; capsule depressed, 1" in diameter, surrounded by the corolla ; 

 seeds strongly reticulate. — Arizona. 



* * Calyx- and corolla-lobes acute ; flowers larger ; capsule almost always regularly circum- 

 scissile. 



2. C. ODONTOLBPis, Eng. Plowcrs 2i" long, short-pedicelled, braoted, in at last large crowded clus- 

 ters ; calyx short-campanulate, deeply parted, the ovate-triangular lobes about equaling the deeply cam- 

 panulate corolla ; corolla-lobes ovate-lanceolate, spreading or reflexed, shorter than the tube ; anthers 

 ovate, equaling the short subulate filaments ; scales broad-ovate, adnate to the middle, nearly reaching 

 to the throat, coarsely dentate above ; style exserted ; ovary depressed-globose ; capsule globose, hooded 

 by the corolla; seeds oval, verruoose. — Arizona. Eesembliug C. suMnclusa, 



3. C. TJMBBIXATA, HBK. Flowcrs 1-2'' long, pedicelled, in loose compound fasciculate cymes ; calyx 

 broad-campanulate, with triangular lobes ; corolla-lobes narrow-lanceolate, longer taan the tube, spread- 

 ing or reflexed ;* scales broad-oval, exceeding the tube, incurved ; capsule small, thin, depressed, almost 

 4-lobed, sometimes irregularly bursting ; seeds triangular, oblique.— W. Texas and Indian Territory to 

 Arizona and Mexico. 



4. C. LEPTANTHA, Eng. Flowers 4-parted, slender, 2-2J" long, on filiform umbellately-fascicled ped- 

 icels; bracts ovate-acuminate; calyx globose-campanulate, granulate-hispid, the triangular lobes audthe 

 lanceolate erect-spreading corolla-lobes much shorter than the corolla-tube ; anthers ovate, shorter than 

 the filiform filaments ; scales ovate, dentate-fimbriate, much shorter than the tube ; ovary globose ; 

 styles at length exserted ; capsule hooded with the slightly hispid coroUa-tnbe ; seeds globose-triangu- 

 lar.— W. Texas. 



§ 2. CLIST06RAMMICA, Eng. Styles unequal, oylindric ; capsule baccate, never opening at 



base. 

 " Flowers pedicelled ; sepals united ; ovary and capsule globose-compressed, with walls of uniform 



thickness, 

 (a.) Flowers in simple or compound subglobose cymes ; style usually short and thick ; withered 



corolla remaining at the base of the capsule. 



5. C. OBTUSIFLORA, HBK. Stems bright orange-color ; inflorescence loose ; calyx- and corolla^lobes 

 obtuse, those of the corolla usually equaling the tube and soon reflexed ; styles at last subulate ; capsule 

 large, depressed, almost naked, 4-seeded. Var. glandulosa, Eng. Scales at least equaling the corolla- 

 tube, deeply fringed, incurved; all parts of the flower dotted with red shining glands.- Florida and 



Georgia to W. Texas. 



6. C. CHLOKOCAEPA, Eng. Resembling the last ; lobes acute ; flowers 1" long, usually 4-parted, not 

 glandular ; scales small or wanting ; capsule greenish-yellow.— Delaware ; Illinois and Wisconsin to the 

 Indian Territory. 



7. C. ARVBNSIS, Beyr. Flowers smaller, in more compound clusters ; lobes of the calyx very obtuse, 

 of the ooroUa acute, exceeding the tube, reflexed and the point inflexed ; scales large, deeply fimbriate ; 

 styles rather slender.— Calyx quite variable. Virginia to Florida, and from Illinois and the Saskatchewan 

 to Texas and New Mexico ; Oregon. 



(6.) Flowers in branching paniculate cymes ; styles capiUary, at least equaling the ovary ; coroUa 

 enwrapping or capping the ripe capsule. 



8. C. TBNUIFLOEA, Eng. Flowcrs short-pedicelled, 1" long or less, mostly 4- often 3-parted ; lobes 

 all obtuse, much shorter than the slender corolla-tube ; scales ovate or spatulate ; capsule globose, 

 hooded. See page 273. The southwestern form has rather larger flowers and capsules. 



9. C. Califoenica, Chois. Flowers l-2i" long, on slender pedicels, loosely panicled ; lobes all nar- 



