MORNING-GLORY FAMILY 677 



Thickets and fence-rows: N.S. N.C. N.M. Wash. B.C. Plain Submont 

 My- Au. 



6. C. interior House. Stems prostrate or somewhat climbing, 2-8 dm 

 long, densely and softly pubescent; leaf-blades deltoid or hastate-ovate, 2.5-4 

 cm. long, glabrous above, pubescent beneath; base shallowly cordate or truncate- 

 bracts broadly ovate, obtuse, closely investing the calyx; corolla white, 3.5-4 cm' 

 long, the limb entire, 3-4 cm. broad. Sandy soil: N.D.Okht.- -Ariz Colo 

 Plain. My-Jl. 



7. C. Macounii Greene. Stem erect, 7-15 cm. high, glabrous; leaves 

 broadly sagittate, about 5 cm. long, glabrous; bracts broad, oval, obtuse, 2-2. :> 

 cm. long, auricled at the base; corolla white, fully 5 cm. long. Sandy soil: 

 Sask. B.C. Plain. Au. 



* 



FAMILY 108. CUSCUTACEAE. DODDER FAMILY. 



Herbaceous parasites, with twining stems, at first germinating in tin- 

 ground, but soon attaching themselves to some other plant by means <>f 

 aerial rootlets, and taking their nourishment from these, the lower part of 

 the stem having decayed early. Leaves reduced to minute alternate seal'-. 

 Flowers perfect, regular, in compact or open cymes. Calyx inferior; sepals 

 5, or rarely 4, distinct or more or less united. Corolla campanulate or sub- 

 globose, 5-lobed, or rarely 4-lobed, the lobes being imbricate, usually with 

 crenulate or fringed scales in the throat, alternating with the lobes. Sta- 

 mens 5, rarely 4, partly adnate to the corolla; anthers 2-celled. Styles 2, 

 mostly distinct; stigmas capitate or elongate. Capsule subglobose or 

 ovoid, 2-celled, circumscissile or bursting irregularly. Embryo curved or 

 spiral, in a fleshy endosperm. 



1. CUSCUTA (Tourn.) L. DODDER, LOVE-VINE, CORAL-VINE. 

 Characters of the family. 



Stigmas elongate, linear; styles equal; capsule circumscissile. 



Corolla globose-urceolate ; scales inside the corolla crenate. 1. C. gracilis. 



Corolla open-campanulate ; scales inside the corolla deeply fringed. 



Calyx-lobes obtuse. 2. C. planiflora. 



Calyx-lobes acute. 3. C. Anthemi. 



Stigmas capitate; stylas usually unequal. 



Capsule circumscissile; calyx and corolla-lobes acuminate; inflorescence umbel-like. 



4. C. umbellata. 



Capsule indehi scent or bursting irregularly. 

 Calyx gamosepalous, usually not bracted. 

 Capsule depressed-globose. 



Lobes of the corolla triangular or lanceolate, acuminate or acute. 



Calyx-lobes acute or acuminate; corolla-lobes erect or somewhat spread- 

 ing, in fruit connivent; flowers pedicelled. 5. C. californica. 

 Calyx-lobes rounded; corolla-lobes strongly spreading with Lnflexed tips; 



flowers subsessile. 6. C. arvcnsis. 



Lobes of the corolla oblong, very obtuse. 



Corolla deeply campanulate, 4-merous, about 2 mm. wide; tube longer 



than the calyx. - C. ccphalanthi. 



Corolla open-campanulate, about 4 mm. wide; tube shorter than the 



calyx. 8. C. plattensis. 



Capsule ovoid-globose, acute. 

 Corolla-lobes not incurved. 



Lobes of the corolla and the calyx obtuse. 



Flowers less than 2mm. long; calyx-lobes very short, rounded and 



denticulate. 9- C. denticulate. 



Flowers 2.5-3 mm. long; calyx-lobes ovate, not denticulate. 



Scales incurved over the ovary; styles about half ax Long as 



the ovary or longer. 10. C. Gronovii. 



Scales appressed to the corolla-tube; styles one-third to one- 

 fourth as long as the ovary. 

 Lobes of the corolla and calyx acute. 

 Corolla-lobes incurved at the apex. 



Capsule 4 mm. or less broad ; inflorescence rather open. 



13. C. indccora. 



