eastern Oregon, south to northeastern Florida, Georgia, Missouri, 

 southern Texas, and CaHfornia. 



alkalinity: mean 56.0 mg/1; range 7.5-137.5 mg/1 

 pH: mean 7.2; range 6.1-8.2 



3. Typha X glauca Godr. Fig. 2, Map 3 



Scattered locations in New England along the coast from Knox 

 County, Maine south and inland along the Champlain Valley; widely 

 scattered and infrequent elsewhere. This taxon is a hybrid between T. 

 lati folia and T. angustifolia. Its range in New England closely paral- 

 lels that of T. angustifolia although it may be found without either 

 parent species. Typha X glauca, exhibiting natural hybrid vigor, is 

 much larger than either parent species; the leaf width and the separa- 

 tion between staminate and pistillate spikes is intermediate to that of 

 the parents. Range extends from central Maine west to southern On- 

 tario, Iowa, and Oregon, south to North Carolina, and Alabama. 

 Reveal (1977) notes that hybrids under the name T. X glauca from 

 Utah and California are plants resulting from T. lati folia X T. 

 domingensis. 



alkalinity: mean 56.3 mg/1; range 10.0-111.0 mg/1 

 pH: mean 7.4; range 7.1-8.1 



Literature Cited and 

 Selected References 



Bayly, I. L. and T. A. O'Neill. 1971. A study of introgression in Typha 

 at Pt. Pelee Marsh, Ontario. Canad. Field Nat. 85: 309-314. 



Fassett, N. C. and B. Calhoun. 1952. Introgression between Typha 

 latifolia and T. angustifolia. Evolution 6: 367-379. 



Hotchkiss, N. and H. L. Dozier. 1949. Taxonomy and distribution of 

 North America cat-tails. Amer. Midi. Nat. 41: 237-254. 



Lee, D. W. 1975. Population variation and introgression in North 

 American Typha. Taxon 24: 633-641. 



Lee, D. W. and D. E. Fairbrothers. 1973. Enzyme differences between 

 adjacent hybrid and parent populations of Typha. Bull. Torrey 

 Bot. Club 100:3-11. 



Reveal, J. L. 1977. Typhaceae. In: Cronquist, A., A. H. Holmgren, N. H. 

 Holmgren, J. L. Reveal and P. K. Holmgren. Intermountain flora. 

 Vascular plants of the intermountain west, U.S.A. Vol. 6. Colum- 

 bia Univ. Press, New York. 584 pp. 



Smith, S. G. 1967. Experimental and natural hybrids in North Ameri- 

 can Typha (Typhaceae). Amer. Midi. Nat. 78: 257-287. 



Yeo, R. R. 1964. Life history of common cattail. Weeds 12: 284-288. 



