1298 



PHILADELPHIA 



PHILADELPHUS 



A. Bark of last year's brandies not peeling off: fls. in 

 racemes. 



B. Calyx pubescent outside: bark gray. 



1. pubescens, Loisel. (P. latifblius, Schrad. P. grandi- 

 florus,va,r. floribundus, A. Gray). Shrub, to 20 ft. high: 

 mature branches of this year yellowish brown, those of 

 last year light gray: Ivs. "broadly ovate, dentate, pubes- 

 cent beneath. 2-4 in. long: racemes rather loose, 5-11- 





1749. Philadelphia coronarius. 



fld. : fls. creamy white, scentless, l%-2 in. across. June, 

 July. Tennessee. B.R. 7:570 and Gn. 40, p. 289 (as P. 

 grandiflorus). B.R. 23:2003 and G.C. II. 16:81 (as P. 

 speciosus}. The figures quoted above do not represent 

 typical plants; they are probably partly hybrids of this 

 species with P. grandiflorus and inodorus, but the figure 

 accompanying the original description by Loiseleur in 

 Herbier gen. de 1'amateur, Vol. IV, t. 2G8, agrees well 

 with wild plants from Tennessee. A dwarf form with 

 double fls., cult. as P. nivalis spectabilis florepleno, prob- 

 ably belongs to this species. P. pubescens of Koch and 

 of Koehne is P. verrucosus; see supplementary list. 



BB. Calyx glabrous outside : bark brown or grayish 

 brown. 



2. Gordonianus, Lindl. Shrub, to 12 ft., with grayish 

 brown branches: Ivs. broadly ovate to elliptic, coarsely 

 dentate, especially those of the young shoots, light 

 green, pubescent beneath, thin, l%-3 in. long: racemes 

 dense, 5-7-fld. : fls. pure white, scentless, l%-l% in. 

 across; petals oval-oblong: ovary half -superior. June, 

 July. Wash, to Ore. B.R. 25:32. Gn. 3, p. 233. 



3. Lewisi, Pursh. Upright shrub, to 8 ft.: bark of 

 branches dark or grayish brown, usually with numer- 

 ous horizontal cracks: Ivs. broadly ovate or elliptic- 

 ovate, entire or sparingly dentate, glabrous or some- 

 what hairy beneath, thickish at maturity, l%-3 in. long: 

 racemes short and dense, 5-9-fld.: fls. short-stalked, 

 1-1% in. across, scentless. June, July. Brit. Colo, to 

 Calif. 



4. Satsumi, Sieb. (P. Yokohdmw, Hort,). Shrub, to 

 8ft., erect: branches of last year with grayish brown 

 bark, usually marked with whitish, longitudinal fis- 

 sures: Ivs. ovate, long-acuminate, dentate or sometimes 

 entire, almost glabrous, 3-6 in. long: racemes loose, 

 erect, 7-9-fld. : fls. about 1 in. across, slightly fragrant. 

 May, June. Japan. 



AA. Bark of last year's brandies peeling off in thin 



flakes, brown. 

 B. Fls. in many-fid, panicles, biit sometimes racemose 



on weaker branches. 



5. Calif6rnicus, Benth. Upright shrub, to 8 ft., with 

 brown branches: Ivs. ovate, with few teeth or almost 

 entire, glabrous or somewhat pubescent beneath, thick- 

 ish at maturity, l%-2% in. long: fls. %-l in. across, 

 scentless; petals oblong. June, July. Wash, to Calif. 

 Similar in habit to P. Lewisi, to which it is usually 

 referred as a variety. 



BB. Fls. in 5-9-fld. racemes, rarely 3. 



c. Lvs. glabrous or nearly so beneath, ovate-lanceo- 

 late : pedicels glabrous. 



G. Pekinensis, Rupr. (P. coronarius, var. Pekinensis, 

 Maxim.). Upright shrub, to 5 ft.: Ivs. ovate-lanceo- 

 late, acuminate, denticulate, thickish at maturity, l%- 

 3 in. long; petioles purplish: racemes short and dense, 

 usually 5-11-fld. : fls. \% in. across, slightly fragrant; 

 style divided only at the apex. May, June. Mongolia, 

 N. China. Dense, upright, but rather low, free-flower- 

 ing shrub. 



7. Falconeri, Sarg. Shrub, to 8 ft., with slender, 

 arching branches : Ivs. ovate-lanceolate, acuminate, 

 denticulate, l%-3 in. long, thickish at maturity: fls. 3- 

 7, slender-pedicelled, fragrant, pure white, about 1% in. 

 across; calyx-lobes lanceolate; petals oblong, acute; 

 style much longer than stamens, deeply divided. June. 

 Origin unknown ; probably Japanese. G.F. 8:497. 

 M.D.G. 1899:231. Gng. 8:340. Very graceful shrub, 

 wide-spreading. 



CC. Lvs. more or less pubescent beneath, usually 

 ovate. 



8. coronarius, Linn. Fig. 1748, 1479. Shrub, to 10 ft., 

 with upright branches: Ivs. ovate to ovate-elliptic, usu- 

 ally acute at both ends, denticulate, sparingly pubes- 

 cent beneath, 2-4 in. long: fls. 5-9 in rather dense ra- 

 cemes, creamy white, very fragrant, on rather short 

 pubescent pedicels; petals oval; style divided about one- 

 half. May, June. S. E. Eu., Caucasus. B.B. 2:186. -This 

 is the common Mock Orange, less showy than the follow- 

 ing species and of somewhat stiff habit, but deliciously 

 fragrant. There are several vars. in cultivation. Var. 

 argenteo-marginata, Hort. Lvs. edged creamy white, 

 and other variegated forms. Var. aureus, Hort. Foli- 

 age yellow. Var. nanus, Schrad. Dwarf, compact shrub, 

 with dark green foliage; flowers but rarely. Var. sa- 

 licifolia, Hort. Lvs. lanceolate or linear-lanceolate. 

 There are also several vars. with double fls., as vars. 

 dianthifldras, multiflorus plenus, primulsefldrus (R.H. 

 1870, p. 305), rossefldrus, mostly of dwarfer habit than 

 the type. 



9. ZSyheri, Schrad. Probably hybrid of the preceding 

 and P. inodorus: lower than P. coronarius and more 

 spreading, with sometimes arching branches : Ivs. 

 ovate, usually rounded at the base: fls. usually 5, pure 

 white, slightly fragrant or scentless, !%-!% in. broad; 

 style sometimes longer than stamens, divided one-half 

 or less. June. Of garden origin. The different forms 

 of P. Zeyheri are, besides those of -the following hy- 

 brid, the most showy of the genus, bearing the large, 

 pure white fls. in great profusion along the branches. 

 P. speciosissimus, Hort., belongs here. 



10. Lem6inei, Lemoine. Hybrid of P. microplii/llus 

 with P. coronarius, of varying'habit: Ivs. ovate to ovate- 

 elliptic or ovate-lanceolate, usually pubescent beneath 

 and %-2% in. long: fls. 3-7 in short racemes, very 

 sweet-scented ; petals oval to oblong, mostly dentate 

 at the apex. G.F. 2:617. Some of the best forms of 

 this hybrid are Avalanche. Graceful shrub, with slen- 

 der arching branches, covered almost the whole length 

 with showy white fls. G.C. III. 21:89. M.D.G. 1896:293. 

 Gerbe de Neige is similar, but the fls. are larger. Boule 

 1'argent has large, double fls. and the habit of P. coro- 

 narius. G.C. III. 18:19 and 23, suppl. 28 May. Can- 

 delabre. Low shrub, with upright branches covered with 

 large fls. M.D.G. 1896:294. Var. erectus. Upright, to 

 5 ft., covered with white fls. Mont Blanc is similar in 

 habit, but fls. larger and showier. 



