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SYSTEMATIC ARRANGEMENT OF THE SPECIES OF CUSCUTA/ 71 
weit iibertreffen, konnten wegen mangelhaften Materials nur wenige aufgefiihrt werden. Alle 
bisher bekanrit gewordeneii amerikanischen Cuseuten gehoren in die Abtheilung derer mit kopffor- 
inigen Narben; nach Choisy wiirde von dieser Regel C. micrantha , Chois, aus Chili, welche in 
Choisy’s Monographie nnd De Candolle's Prodromus in der Abtheilung der Cuseuten mit verlan- 
gerten, fadenformigen oder keulenformigen Narben vorkommt, eine Ausnahme machen, allein 
Choisy s eigene Abbildung zeigt kopiTormige Narben. Audi die Cuseuten Australiens haben 
alle kopfiormige Narben. Uebrigens sind einige der europaisehen Cuseuten mit verlangerten [276] 
Narben in Amerika. eingewandert, so namentlich C. Upilinum. 
This law of expediency, however, can have no scientific value, and can certainly not be pleaded m 
regard to such a natural, easily recognized, and not too numerous genus, as Cuscuta is. 
The subdivisions proposed are based, as has been stated, on the shape of the styles and stigmata, 
and on the capsule. 
The styles, typically always two, usually are distinct; or they are united in their whole length 
or nearly so. They are of equal thickness throughout, or are thicker at base (subulate), or thickened 
towards the top (club-shaped); they are of equal length in one group, and unequal m another. 
The stigmata are cylindric, elongated, and of the same thickness as the styles, or thinner; or 
they are oblong, or oblong-elongated, and thicker than the styles; or they are subulate from a thick 
base; or we find them capitate (or, as they are often, though wrongly, called, globose), hemis¬ 
pherical, or somewhat flattened on the upper, and flattened or usually impressed at the lower surface 
-i. ;-n™. 0 f,riA Tn a single species, the stigmatic surface of the dilated top of the style 
at the insertion of the style. In a single species, the stigmatic i 
is lobed, and in the centre somewhat depressed. 
The capsule is either circumscissile, opening transversely by a regular joint, with [454 (4)J 
u ‘h-.-.-nafla tranevprKplv with an irregular, jagged margin; or it remains 
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