Tjik Klora of the Cayuga Lake Basin 333 



Near Ludlowville, formerly (//. B. Lord, D.) ; knoll near Ellis Hollow Swamp, 

 under hemlocks, formerly (D.). Not seen in recent years. 



Lab. to Alaska, southw. to Pa., Mich., Minn., Colo., and Oreg. ; rare or absent 

 en the Atlantic Coastal Plain. Found also in Eurasia. 



6. Ledum L. 

 1. L. groenlandicum Oeder. {L. latifolium of Cayuga Fl.) Labrador Tea. 



In peat bogs; scarce, luue 1-20. 



Wootlwardia Bog (DA.) ; Malloryville Bog {DA); McLean Bogs {DA); bog 

 e. of I hick Lake; Crusoe Lake swamp. 

 Arctic regions, southw., chiefly inland, to Pa., Mich., and Wis. 



7. Rhododendron L. 



a. Leaves thin, deciduous; corolla funnel-form; stamens conspicuously exserted. 



1. R. nndiflorum, var. roseum 

 a. Leaves coriaceous, evergreen; corolla short- funnel-form ; stamens scarcely exserted. 



2. R. maximum 



1. R. nudiflorum (L.) Torr., var. roseum (Loisel.) Wiegand. (See Rhodora 



20:53, 1918, and 26:4, 1924. R. canescens of Gray's Man., ed. 7, as to north- 

 ern plants. R. nudiflorum of Cayuga Fl.) Pink Azalea. Pinxter Flower. 



Dry sandy or gravelly open woods and thickets, in acid soils, also in swamps ; 

 frequent. May, in the swamps two to three weeks later. 



On the hills w., s., and e. of Ithaca, along the cliffs of Cayuga Lake, and in the 

 sands n. of the lake; absent in the dry woods of the McLean district and on the 

 clays and richer soils back from the lake shores. Swamp stations : Headwaters 

 Swamp; Michigan Hollow {D.) ; Riagwood; Dryden-Lansing Swamp (D.) ; Mal- 

 loryville Bog. 



N. H. to N. Y., southw. along the mts. to Fla. and La. 



Rehder, in his recent revision of the azaleas (Monog. Azalea, by Wilson & 

 Rehder, Pub. Arnold Arboret. no. 9: 138. 1921), has treated this variety 'as a 

 distinct species under the name R. roseum (Loisel.) Rehder. After an inspection 

 of a large number of specimens it seems impossible to follow Rehder, since all the 

 characters given by him as distinguishing R. nudiflorum from this plant apparently 

 break down. It is best, therefore, to treat the plant as a variety. 



2. R. maximum L. Great Laurel. 



Mucky soil, in damp rocky or gravelly neutral or acid locations; rare. July 10-30. 



Michigan Hollow Swamp, abundant over a restricted area {DA.); woods along 

 Dry Run about two miles n. w. of North Spencer, 1915 {A. J. E. & L. H. Mac- 

 Daniels). 



Que. (?). N. S., Me., and Out., southw. to Ga. ; rare northw. A plant of the 

 AHegheny Mts. Central N. Y. is near the northern limit of this plant, which is 

 abundant in the mts. from Pa. southw. 



8. Kalmia L. 



a. Leaves mostly alternate, 5-12 cm. long, green beneath, nearly flat; twigs nearly 

 terete. L K. latifolia 



a. Leaves opposite, 1-4 cm. long, glaucous-white beneath, revolute ; twigs 2-edged. 



2. K. polifolia 

 1. K. latifolia L. Mountain Laurel. 



Damp sandy or gravelly, often rocky, slopes, in acid soils; scarce. June 

 10-July 10. 



