ROSACEAE 



549 



ers white, about 3 cm. across, tlie pedicels rather stout, 2-2.5 purple, densely woolly, pubescent only while young. May. 



cm. long, densely pubescent; calyx-lobes deltoid-ovate; fruit Honshu; rare, 

 globose, 2-3 cm. across, yellowish green, slightly reddish 



27. PYRUS L. Nashi Zoku 



Large often spiny shrubs or trees; leaves alternate, stipulate, toothed or entire, undivided or lobed, folded in bud, petiolate, 

 often with pale brown woolly hairs while young; inflorescence an umbellate corymb usually with a short axis; flowers white, 

 rarely pink, opening before or with the leaves; caly.x-lobes spreading or reflexed; petals short-clawed, ovate-orbicular; stamens 



20-30; styles 2-5, free; ovules 2 in each locule; fruit a pome, with cartilaginous walls; seeds nearly black. About 20 species, 



in temperate regions of Eurasia and N. Africa. 



lA. Calyx-lobes persistent after anthesis. 



2A. Leaves aristately acute-toothed I, P. ussiiricnsis 



2B. Leaves obtusely serrulate 2. P. communis 



IB. Calyx-lobes deciduous after anthesis. 



3A. Styles 2, rarely 3; leaves obtusely to subacutely crenate-toothed ; ovary 2- or 3-locular 3. P. calleryana var. dimorphophylla 



3B. Styles, rarely 4; leaves aristately toothed; ovary 5-locular 4. P. pyrijoUa 



1. Pyrus ussuriensis Maxim, var. aromatica (Nakai & pubescent, soon glabrate; leaves dimorphic, pubescent only 



Kikuchi) Rehd. P. aromatica Nakai & Kikuchi Iwate- while young, ovate to ovate-orbicular, sometimes narrowly 



YAM.\-NASHi. Tree; leaves ovate to broadly so, 6-11 cm. ovate, 2-9 cm. long, 1.5-5.5 cm. wide, often 3-lobed in those 

 long, 4-6 cm. wide, the pedicels stout, 1.5-4.5 cm. long; fruit on young vigorous shoots, with incurved teeth, the pedicels 

 globose to ovoid-globose, 2-3.3 cm. across, 5-locular, obtuse at soft-pubescent, 2-3.5 cm. long; calyx-lobes deltoid to ovate- 

 base or with depressed ends, green, the lenticels brown, lanceolate, deciduous; styles 2, rarely 3; fruit 7-14 mm. 



minute, very numerous, the persistent cal>'x-lobes linear-lanceo- across, rounded at base, pale brownish yellow, lendcellate. 



late to lanceolate. Apr. Honshu (n. distr.). Apr. Honshu (centr. distr.) ; rare. The typical phase occurs 



Var. hondoensis (Nakai & Kikuchi) Rehd. P. hondoensis in Korea and China. 



Nakai & Kikuchi Ao-nashi. Leaves ovate, 5-7.5 cm. 4. Pyrus pyrifolia (Burm. f.) Nakai. Ficus pyrijoUa 



long, 3-4 cm. wide, caudately acuminate, serrulate; pedicels Burm. f.; P. /ero/;Ma Rehd.; P. nzontona Nakai; P. ^/f/«/;o/;anfl 



0.8-1.5(-2) cm. long; fruit globose, slighdy depressed at base, Koidz. Yama-nashi. Small tree, the branches often 



green, 2.5-3 cm. across, with minute brown lenticels, the woolly-pubescent while young; leaves chartaceous, ovate or 



calyx-lobes lanceolate, spreading. Honshu (centr. distr.). narrowly so, 7-12 cm. long, 4-6 cm. wide, acuminate, rounded 



The typical phase occurs in Korea, Manchuria, and Us- at base, glabrate on both sides, the pedicels 3-5 cm. long; calyx- 



suri. lobes lanceolate; ovary (4-) 5-locular; styles 5, rarely 4; fruit 



2. Pyrus communis L. Seiyo-nashi. Tree; leaves globose, 2-3 cm. across, lenticellate, brown. Apr. Nat- 

 ovate-orbicular to elliptic, 4-10 cm. long, undulately toothed, uralized (?) in low mountains and around villages in moun- 

 glabrous or woolly-pubescent while young; pedicels 1.5-3 cm. tains; Honshu, Shikoku, Kyushu. China. 



long; fruit pyriform to subglobose. Apr. European tree Var. culta (Makino) Nakai. P. sinensis var. culta Makino; 



cultivated for the fruit. P. serotina var. culta (Makino) Rehd. Nashi. An assem- 



3. Pyrus calleryana Decne. var. dimorphophylla (Ma- blage of numerous improved cultivars yielding edible fruit, 5-10 



kino) Koidz. P. dimorphophylla Makino Mame-nashi, cm. across, the leaves broadly ovate to ovate-orbicular. 



Inu-nashi. Small tree, the young branches densely woolly- 



28. AMELANCfflER Medic. 



Zai-furi-boku Zoku 



Deciduous trees or shrubs; leaves alternate, petioled, simple, toothed, conduplicate in bud, the sripules small, deciduous; in- 

 florescence a terminal raceme; flowers white; calyx-tube campanulate, the teedi small, persistent; petals 5, obovate to lanceolate; 

 stamens 10-20; ovary inferior, the ovules 2 in each locule; styles 2-5, free or connate at base, each separated by a false wall from 

 the back of the locule; pome berrylike, bluish black. About 25 species, mainly in N. America, a few in Europe and Asia. 



1. Amelanchier asiatica (Sieb. & Zucc.) Endl. Aronia 

 asiatica Sieb. & Zucc; Amelanchier canadensis var. japonica 



Miq.; Pyrus taquetii Lev.; P. vaniotii Lev. Zai-furi-boku. 



Tree, the branches white-pubescent while young, glabrate, 

 slender; leaves obovate or broadly so, 4-7 cm. long, 2.5—4 cm. 

 wide, abruptly acuminate, obtuse to rounded at base, with 

 minute low teeth, thinly appressed-pubescent on upper side 

 while young, more densely so beneath, becoming glabrous on 



both sides, the petioles 1-1.5 cm. long, white-pubescent to 

 nearly glabrous; inflorescence a corymbose raceme, white- 

 woolly, about 10-flowered, the bracts linear; petals 15-18 mm. 

 long, 4-5 mm. wide, obtuse; ovary densely hairy at tip; styles 

 5, connate on lower half; fruit globose, 4-6 mm. across, termi- 

 nated by the recurved calyx-lobes. Apr.-May. Hills and 



mountains; Honshu, Shikoku, Kyushu; common. Korea. 



29. POURTHIAEA Decne. Kama-tsuka Zoku 



Deciduous shrubs or trees; leaves alternate, stipulate, simple, short-petioled, toothed, the stipules deciduous; inflorescence a 

 terminal, many-flowered corymb or cyme; flowers small, white, bisexual; calyx persistent; petals 5, stamens rather many; styles 



2-4, connate at base; pome globose to ovoid, small, the seeds 2 in each locule. Few species, in temperate to warmer regions 



of e. Asia. 



