14 JOURNAL OF THE ARNOLD ARBORETUM [vol. hi 



As this group of hybrids has not yet received a binomial designation, 

 I propose the name R. dilecta, meaning the beloved or highly esteemed, 

 since such universal favorites as "American Beauty" and "La France" 

 belong in this group. 



Rosa Richardii, nom. nov. — Rosa sancta A. Richard, Fl. Abyss. I. 

 262 (1847), non Andrews. 



The name R. sancta given by Richard to this Abyssiniana Rose is un- 

 fortunately antedated by R. sancta Andrews, Roses, n. t. 98 (1928) and 

 cannot be retained. The exact systematic position of Andrew's R. sancta 

 is not clear; it bears some resemblance to R. chinensis var. minima Rehd. 

 (R. Lawrenceana Sweet), as Miss Willmott (Gen. Rosa n. 338) points out, 

 but the slender infrastipular paired prickles and the stipitate-glandular 

 pedicels suggest relation to the Cinnamomeae. 



X Rosa Waitziana Tratt. var. macrantha, comb. nov. — R. macrantha 

 Desportes, Fl. Sarthe, 77 (1838). — Grenier & Godron, Fl. France, I. 

 553 (1848). — Boreau, Fl. Cent. France, ed. 3, n. 227 (1857). — A. 

 Piper in Gard. lii. 465 t. fig. 1. — Rouy & Camus, Fl. de France, vi. 270 

 (1900). — Mottct in Rev. Hort. 1901, 548, t. fig. 2.— Willmott, Gen. 

 Rosa, ii. 403 (1912). — Bean, Trees, Shrubs Brit. Isls. n. 418 (1914). 

 R. gallica var. macrantha Hort. apud Rehder in Bailey, Cycl. Am. Hort. 

 iv. 1552 (1902); Stand. Cycl. Hort. V. 2989 (1916). 



This hybrid Rose which is undoubtedly a hybrid between R. canina 

 and R. gallica and was first described as Rosa macrantha must be referred 

 according to the Rules as a variety to R. Waitziana Trattinick, not Reich- 

 enbach the oldest binomial designation for a hybrid between R. canina 

 and R. gallica. 



Rosa arnoldiana, Sargent in Bull. Pop. Inform. Arnold Arb. n. ser. 



v. 38 (1919) (R. rugosax borboniana "G6n£ral Jacqueminot"). — Gersdorff 



in Am. Rose Ann. 1919. 136. — Rosa "Arnold" in Am. Rose Ann. 1916, 



125. — Rosa "Dawson's Hybrid Rugosa" Gersdorff in Am. Rose Ann. 

 1917, 121. 



Shrub with stout upright stems; shoots and flowering branchlets cov- 

 ered with slender prickles and bristles, the prickles gradually passing 

 into short glandtipped bristles and stipitate glands; the young stems 

 sparingly pubescent or nearly glabrous. Leaves 5-7-foliolate; leaflets 

 elliptic-ovate or broadly elliptic, 3.5-6 cm. long, short-acuminate or 

 rounded at apex, rounded at base, simply or slightly doubly serrate, 

 dark green and slightly rugose above, grayish green beneath and finely 

 pubescent on the veins and sparingly so on the veinlets; petiole and 

 rachis pubescent and stipitate-glandular and sparingly furnished with 

 small often gland-tipped prickles; stipules broad, sparingly glandular 

 ciliate. Flowers bright amaranth-purple, semi-double about 6 cm. across 

 in few-flowered corymbs; bracts large; pedicels densely stipitate-glandular; 

 sepals ovate-lanceolate, long-acuminate, entire, very rarely with a single 



