BLUE AND PURPLE FLOWERS 
GROUP IV 
Plants without leaves. 
One-flowered Cancer-root (Orobanche uniflora). Broom- 
rape family. April to July. 
A little parasite whose underground, scale-bearing stem sends 
up one to three slender hairy branches, a few inches high, each 
bearing one flower; calyx generally five-parted, whitish to violet- 
colored ; corolla (one inch) with long tube, and five-lobed border. 
Damp woods. The Greek name signifies vetch and strangler, 
referring, doubtless, to its parasitic qualities. 
CoTal-ioot (Corallorrhizamaculata). Orchis family. July 
to September. 
A purplish stem, six to eighteen inches high, springs from a 
root suggestive of white coral. The stem has scales but no 
leaves, and bears at the top a raceme of six to twenty (one- 
half to three-fourths inch) purplish flowers with three lance- 
shaped sepals, two similar petals and a broader, three-lobed, 
purple-spotted lip, the lateral lobes small, the middle broad 
with crinkly edge. The oblong drooping fruit is more noticeable 
than the flower. The plant is a parasite on the roots of other 
plants. Woods. The Greek name signifies coral-root. 
GROUP V 
Plant with leaves whorled about the stem under water. 
Purple Bladderwort (Utricularia purpurea). Bladderwort 
family. May to September. 
A short delicate stem rises from the water and bears at its 
summit a small irregular flower with two-lobed calyx and two- 
lipped corolla, upper lip erect, lower with spur and three lobes. 
The leaves, on which appear many small bladders, are finely 
dissected. Found in still water. The Greek name signifies a 
little bladder. 
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