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. 



MONOTROFA 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. 



