No. 14.] FLOWERING PLANTS AND FERNS. 307 



coast: Ledyard (Graves), Guilford (W. R. Dudley). Be- 

 coming occasional northward. June. 



Pyrola elliptica Nutt. (oval). 

 Shin Leaf. 



Occasional to frequent. Dry woods, usually in rich soil. 

 June — July. 



Pyrola americana Sweet. 



Pyrola rotundifolia Gray's Manual ed. 6, not L. 

 Round-leaved Shin Leaf. 



Frequent or local. Dry woods. June — July. 



This, like all other species of the genus, is sometimes used 

 medicinally. 



MONOTROPA L. Indian Pipe. Pinesap. 



Monotropa uniflora L. (single-flowered). 



Indian Pipe. Corpse Plant. Fit-root. Ghost-flower. 



Frequent. Moist or dry woods in rich soil. July — Aug. 



The root is sometimes employed medicinally and has been 

 used as a substitute for opium. 



Monotropa Hypopitys L. (under pine trees) . 

 Hypopitys Hypopitys Small. 

 Hypopitys lanuginosa Nutt. 

 Hypopitys americana Small. 

 Pinesap. False Beech-drops. 



Occasional. Rich woods. Aug. — Sept. 



LEDUM L. Labrador Tea. 



Ledum groenlandicum Oeder. 

 Ledum latifolium Ait. 

 Labrador Tea. 



Rare or local. Bogs or sphagnum swamps: Willington 

 (Graves), Norfolk (Miss M. C. Seymour). June. 



The leaves are medicinal. 



RHODODENDRON L. 



Rhododendron viscosum (L.) Torr. (sticky). 

 Azalea viscosa L. 

 Clammy Azalea. White Swamp Honeysuckle. 



