214 BOTANICAL GAZETTE [march 



distinctly pubescent branchlets extends far beyond the region occupied by 

 typical P. Fremontii it will perhaps be best to consider that they represent a 

 geographical variety. I have seen the following specimens: 



California. — San Bernardino Mountains, G. R. Vasey, 1880; San Ber- 

 nardino, C. C. Parry, April 1883, C. S. Sargent, March 30, 1916; Barstow, 

 San Bernardino County, W. L. Jepson, May 1914 (no. 5894), March 8 and 22, 

 1916 (nos. 6610, 6611, 6626); Warner Hot Springs, San Diego County, Alice 

 Eastwood, April 9, 1913 (no. 2619); Bernardo, San Diego County, Le Roy 

 Abrams, May 2,- 1903 (no. 33701). 



Nevada.— " Kiernan, Meadow Valley, Wash.," L. N. Goodding, April 28, 

 1902 (no. 634); south base of Mount Grant, Mineral County, A. A, Heller, 

 July 2, 1913 (no. 10909). 



Utah. — St. George, Washington County, M. E. Jones, March 30, 1880 

 (no. 1611). 



PopuLus Fremontii var. Toumeyi, n. var. — Differing from the 

 type in the cordate-cuneate broad base of the leaves, and in the 

 larger disk of the fruit. Leaves ovate, the base shallow cordate 

 and gradually narrowed and cuneate to the insertion of the petiole, 

 gradually narrowed and acuminate at the entire apex, coarsely and 

 irregularly crenately serrate below, glabrous, 6-7 cm. long and 

 broad. Fruit oblong-ovoid to slightly obovoid, acute or obtuse 

 at apex, 8-10 mm. long, the disk 6-7 mm. in diameter; pedicels 

 4-5 mm. in length. 



Arizona. — Tucson, Pima County, /. W. Tourney, April 28, 1894 (type); 

 Pima Canyon, Santa CataUna Mountains, Pima County, /. /. Thornher, 

 March 2, 1913; Santa Cruz River bottoms, Pima County, /. /. Thornher, 

 March 30, 1913; Nogales, Santa Cruz County, McPherson, April 15, 1915; 

 Hermit Creek, Grand Canyon of the Colorado, Coconino Coimty, Alice East- 

 wood, April 10, 1917 (no. 6002). 



Populus Parryi, n. hyb. {P. Fremontii Xlrichocar pa). — Leaves 

 ovate, rounded or shghtly cordate at the broad entire base, gradu- 

 ally narrowed, acuminate and entire at apex, finely crenately ser- 

 rate below, sparingly villose and ciliate on the margins when they 

 unfold, soon glabrous, and at maturity thin, dark green, and lustrous 

 above, silvery white below, 6-8 cm. long and broad; petioles slen- 

 der, slightly compressed, glabrous, 4-6 cm. in length; leaves on 

 vigorous shoots sometimes oblong-ovate, truncate or rounded at 

 base, acute at apex, more coarsely serrate, 9-12 cm. long and 

 8-10 cm. wide, with stout compressed petioles 3-4 cm. in length. 



