2876 



PYRUS 



PYRUS 



ing to Sargent, P. fusca "grows usually in deep, rich 

 soil in the neighborhood of streams, often forming 

 almost impenetrable thickets of considerable extent, 

 and attains its greatest size in the valleys of Washington 

 and Oregon." The fr. is eaten by Indians. Var. levipes, 

 comb. nov. (Mains fusca var. levipes, Schneid. M. 

 rivularis var. levipes, Koehne. Pyrus rivularis var. 

 levipes, Nutt.), has glabrous infl. and outer surface of 

 calyx. Var. diversifolia, comb. nov. (Pyrus diversi- 

 folia, Bong. Mdlus fusca var. diversifolia, Schneid. 

 M. rivularis var. diversifolia, Koehne), has white- 

 tomentose infl. and outer surface of calyx. Mdlus 

 Dawsonidna, Rehd., is a supposed hybrid of P. fusca 

 and P. Malus raised at the Arnold Arboretum and 

 named for Jackson Dawson. In habit it is like P. 

 fusca, but the Ivs. are usually broader and more oval, 

 more crenately serrate and rarely lobed: fls. and frs. 

 nearly twice as large, the calyx persistent. S.T.S. 

 2:91. 



BB. Calyx persistent: eastern. 



c. Foliage glabrous at maturity. 



D. Apex of Ivs. rounded and obtuse; margins crenate- 



serrate. 



38. angustifdlia, Ait. (Mdlus corondria, Brit. M. an- 

 gustifdlia, Michx. M. sempervirens, Desf. P. semper- 

 virens, Willd. M. microcdrpa var. sempervirens, Wenz.). 

 Small tree, to 20 or 30 ft.: Ivs. lance-oblong, crenate- 

 serrate or almost entire, not lobed or only slightly 

 so, thick and partially evergreen, rounded at apex, 

 cuneate at base: fls. 1 in. across, fragrant, in few-fld. 

 umbels, slender -pedicelled; calyx -tube glabrous or 

 pubescent outside, the lobes narrow-acuminate and 

 with rigid points and tomentose inside; petals narrow- 

 obovate, slender-clawed; styles tomentose below: fr. 

 subglobose to slightly pyriform, %-l in. diam., with 

 cavities at both ends, yellow-green and fragrant. Va. 

 to Fla. and Miss. S.S. 4:169. B.R. 1207. A double-fld. 

 form is sometimes described and figured as P. angus- 

 tifolia, but it is properly P. ioensis (No. 44). Var. 

 puberula, Bailey (If. corondria var. puberula, Rehd. M . 

 angustifdlia var. puberula, Rehd.), in Miss, and La., 

 differs mostly in its pointed Ivs., which are lightly 

 pubescent beneath when young, and by the slightly 

 villous pedicels. 



DD. Apex of Ivs. acute or acuminate. 

 E. Lvs. not lobed, or sometimes slightly so at end of vigor- 

 ous shoots. 



39. platycarpa, Bailey (Mdlus platycdrpa, Rehd.). 

 Small tree, to 20 ft., with spreading unarmed branches, 

 young growths thin-tomentose but becoming glabrous: 



Ivs. ovate to elliptic, rounded at base, the apex rounded 

 but with short acute point, sharply and mostly doubly 

 serrate, those on vigorous shoots broad-ovate and 

 usually with several pairs of very broad triangular 

 lobes: fls. 3-6 in raceme-like umbels, about */in. diam., 

 on glabrous pedicels 1-1 J^ in. long; calyx-tube obconic 

 and glabrous, the lobes or sepals lanceolate-acuminate 

 and longer than the tube 

 and densely tomentose 

 within though glabrous 

 without; petals orbicu- 

 lar-ovate, usually den- 

 tate; styles 5, villous be- 

 low the middle and con- 

 nate for one-third their 

 length: fr. depressed- 

 globose with deep 

 depressions at both ends, 

 broader than long (2 in. 

 diam.), with persistent 

 calyx, sometimes used 

 for preserves. N. C. to 

 Ga. in fertile bottoms. 

 S.T.S. 2:189. Mostly 

 closely related to P. 

 coronaria, but easily dis- 

 tinguished from this as 

 well as from other species 



by the broad and large 3297 Pyrus giaucescens. 

 Ivs. which are rounded 

 and abruptly acuminate at apex, and never lobed, and 

 by its very large fr. 



Var. Hoopesii, Bailey (Mdlus corondria var. Hoopesii, 

 Rehd. M. platycdrpa var. Hoopesii, Rehd.). Differs in 

 pubescent calyx, oval to elliptic Ivs. only slightly or not 

 at all lobed, ana by the larger fr. Known only in cult. 



40. lancifdlia, Bailey (Mdlus lancifolia, Rehd.). 

 Fig. 3296. Small tree, to 25 ft., with spreading spiny 

 branches, the branchlets slightly pubescent or nearly 

 glabrous: Ivs. ovate-lanceolate to oblong-lanceolate, 

 13^-3 in. long, at the apex acute or short-acuminate, 

 at the base rounded or broad-cuneate, either finely or 

 coarsely serrate and frequently doubly serrate with 

 the short teeth pointing forward, those on vigorous 

 shoots ovate or oblong-ovate and often slightly lobed : 

 fls. 3-6, in umbel-like racemes, white or rose, something 

 over 1 in. across, on slender glabrous pedicels 1 in. or 

 more long; calyx-tube obconic and on the outside gla- 

 brous, the lobes or sepals oblong-lanceolate and exceed- 

 ing the tube and villous-tomentose within but glabrous 

 without; petals oval, long-clawed; styles 5, densely 

 villous below the middle: fr. subglobose, about 1 in. 

 diam., on slender drooping pedicels, green and waxy. 

 Pa. and Va. to Mo. S.T.S. 2:158 (a sprig of which is 

 reduced in Fig. 3296). Distinguished from P. coronaria 

 (P. angustifolia) by the shape of the Ivs., which are 

 acuminate and less coriaceous, by the narrower and 

 longer calyx-lobes, styles villous to middle, and by the 

 different fr. 



EE. Lvs. distinctly lobed, particularly on the strong shoots 

 and sometimes on the flowering branchlets. 



41. giaucescens, Bailey (Mdlus giaucescens, Rehd.). 

 Fig. 3297-3299. Small tree or large shrub, with twiggy 

 spiny head, the branchlets glabrous or at first slightly 

 pubescent: Ivs. triangular-ovate or ovate, 2-3 J^ in. 

 long, at the apex acute or short-acuminate or even 

 rounded, at base truncate villous-tomentose when young 

 but becoming glabrous, glaucescent beneath, more or 

 less triangular-lobed, coarsely serrate with abruptly 

 acuminate teeth, the lowest pair of veins arising some 

 distance above the base of the blade; petioles slender, 

 soon becoming glabrous: fls. white or pink, 5-7 in 

 umbel-like racemes, appear when Ivs. are nearly full- 

 grown, on slender glabrous pedicels 1 in. or so long; 

 calyx-tube thinly villous outside, the lobes oblong- 



