Key for Saskatchewan Cuscuta
1a. Flowers all or mostly 4-merous, in globose
clusters; corolla (3-) 4 (-5) parted, cylindric-campanulate, the lobes erect;
withered corolla capping capsule, but often soon cast off. --- (to 2).
1b. Flowers all or mostly 5-merous; corolla lobes
+/- spreading. --- (to 3).
2a. Corolla-lobes obtuse or rounded, much shorter
than the tube; calyx-lobes shorter than corolla tube, not reaching sinuses, free
nearly to base, very unequal, the outer much overlapping the inner; style equal
to or longer than capsule; scales short-toothed along margins and summit. --- C.
2b. Corolla-lobes acute, subequal to tube, with
incurved tips; calyx reaching sinuses of corolla; scales of 2-cleft few-toothed
narrow halves. --- C. coryli (Thr)
3a. Calyx-tube short, the lobes triangular, acute;
flowers 2-2.5 mm long, on pedicels longer than flowers. --- C. indecora
var. neuropetala (Ver?)
3b. Calyx-lobes ovate, obtuse.
--- (to 4)
4a. Flowers 1.5-2 mm long, on pedicels subequal to
flowers; calyx subequal to and enclosing corolla-tube; corolla-lobe tips
inflexed; withered corolla basally attached until shed; calyx angled. --- C.
4b. Flowers 2-4 mm long, on pedicels shorter than to
subequal to flowers; calyx shorter than and not enclosing corolla tube. --- (to
5a. Corolla-lobes erect; seeds 2-2.8 mm long; scales
2-cleft, long fringed at summit, about half as long as corolla-tube; styles ¼
as long as capsules. --- C. megalocarpa (UC)
5b. Corolla-lobes widely spreading; seeds 1-1.5 mm
long; scales oblong, fringed nearly to base, nearly as long as corolla-tube;
styles 2/3 as long as capsule. --- C. gronovii
- unverified in SK
Thr - threatened in SK
UC - uncommon in SK
FC - fairly common in SK