1921) REDIIER, NEW SPECIES, VARIETIES AND COMBINATIONS 17 



Rehder. North Carolina: Buncombe County, October 29, 1906, 

 T. G. Harbison. Tennessee: Nashville, Davidson County, October, 

 1879, A. Gattinger; Memphis, Shelby County, May 15, 1920, E. J. Palmer 

 (No. 17512). Alabama: Selma, Dallas County, May 5, 1913, T. G. 

 Harbison (No. 1099). All in herb. Arnold Arboretum. 



This variety differs from the type in its more or less doubly serrate 

 leaflets, their teeth provided at least partly with one or few gland-tipped 

 small teeth or glandular-ciliate, and in its glandular-hispid or stipitate- 

 glandular rachis. I can see no other difference between this variety and 

 the type with which it is closely connected by intermediate forms. There- 

 fore I cannot consider it specifically distinct, as does Rydberg. He lays 

 much stress on the teeth being gland-tipped on 7?. serrulata in which he 

 includes also forms with simply serrate leaflets, and glandless in R. Caro- 

 lina, but I find the teeth in R. serrulata as well as in R. virginiana and R. 

 Carolina tipped by a callous more or less gland-like mucro, not by a dis- 

 tinct gland; distinct stipitate glands occur only on the minute serratures 

 of the teeth of the leaflets of the var. glandulosa and also on the minute 

 teeth at the base of these leaflets. To var. glandulosa belongs probably, 

 at least partly, Crepin's R. parviflora var. setigera with bristly flowering 

 branchlets, though it may be partly referable to R. subserrulata of Rydb., 

 which may be likewise only a variety of R. Carolina. 



According to Rydberg R. serrulata Raf. is distributed from Massa- 

 chusetts to Ontario, Iowa, Texas and Florida and extends into Mexico 

 as far as Coahuila and Nueva Leon. 



Rosa Lyonii Pursh. f. alba, comb. nov. — R. lucida var. alba in Am. 

 Florist, xn, 1098, fig. (1897); in Gardening, v. 306, fig. (1897). — 

 Rehder in Bailey, Cycl. Am. Hort. iv. 1551 (1902); in Moller's 

 Deutsch. Gartn. - Zeit. xix. 205, fig. (1904). — /?. virginiana alba Will- 

 mott, Gen. Rosa, i. tab. opp. p. 198 (1911). — Bean, Trees & Shrubs, 

 Brit. Isls. ii. 447 (1914), as var. — Rehder in Bailey, Stand. Cycl. Hort. 



v. 2991 (1916), as var. 



This white-flowered form which had been referred to R. virginiana 

 Mill, belongs apparently to R. Lyonii Nutt., as the petioles, rachis and 

 the under side of the leaves are pubescent, the leaflets are obovate to 

 elliptic or narrow-elliptic, usually obtuse, rarely acute, and dull green 

 above; the prickles are rather small, slender and straight. The form 

 was found at Cherryfield, Maine, about 1867. 



Rosa suffulta Greene f. alba, n. comb. — R. pratincola f. alba Rehd. 

 in Mitt. Deutsch. Dendr. Ges. xix. 252 (1910). — R. arkansoides f. alba 



* 



Schneider, 111. Handb. Laubholzk. n, 971 (1911). — R. heliophila f. alba 

 Rehder in Mitt. Deutsch. Dendr. Ges. xxiv (1915), 222 (1916). 



A form with white flowers received in 1901 from Professor S. B. Green 

 of the University of Minnesota, St. Anthony Park, Minnesota. 



