236 PROCEEDINGS OF THE AMERICAN ACADEMY. 



glaberrima, supra saturate luteo-viridia, subtus pallidiora, nervis 

 utrinsecus 7-10 areuatis, in sicco utrinque leviter reticulata; petioli 

 initio albido-lanati, rarius fere glabri, mox omnino glabri, graciles, 

 2-6 cm. longi. Inflorescentia umbellato-racemosa, 5-7-flora, albido- 

 lanata, raro fere glabra; pedicelli 2-2.5 cm. longi, ut receptaculum 

 initio plus minusve lanati, rarius fere glabri, mox omnino glabri; 

 sepala triangulari-lanceolata, acuminata, glandulosa-serrata, recepta- 

 culo paullo longiora, 4-5 mm. longa, extus sparse, intus densius 

 lanata; petala ovalia, breviter unguiculata, 1-1.5 cm. longa et 0.8- 

 1.2 cm. lata, glabra, alba; stamina circiter 20, dimidia petala subae- 

 quantia; styli glabri, 3-4, rarissime 2. Pomum pyriforme, 2-2.5 cm. 

 longum et 1.5-2 cm. diam., graciliter pedicellatum pedicello 2-3 cm. 

 longo, fuscum, pallide lenticellatum, 3-4-loculare, rarissime 2-loculare; 

 semina obovoidea, compressa, circiter 7 mm. longa, fusco-castanea. 



Arnold Arboretum, cultivated, May 12, 1909, and October 1908 

 (type, raised from seed sent by Dr. E. Bretschneider from Peking in 

 1882). 



This species is most closely related to P. bctulaefolia Bunge which is 

 easily distinguished by its much smaller 2-celled fruit, the smaller 

 flowers, the smaller and more coarsely serrate leaves and the denser 

 grayish tomentum persisting on the branchlets, on the inflorescence 

 and often on the under side of the leaves particularly on the midrib 

 until autumn. In the shape of its leaves it has some resemblance to 

 P. Bretschncideri Rehder, but that species has setosely serrate, gen- 

 erally larger and broader leaves and larger yellow subglobose fruit. 



Pyrus phaeocarpa was apparently first introduced in its pear-shaped 

 form to the Horticultural School at Potsdam, Germany, about 1870. 

 At the Arnold Arboretum both the pear-shaped and the apple-shaped 

 forms were raised from seed sent by Dr. Bretschneider from Peking 

 in 1882. 



Pyrus phaeocarpa f. globosa Rehder, forma n. 

 A typo recedit fructu globoso, 1.5-2. cm. diam. et foliis paullo latiori- 

 bus, saepius ovatis et basi rotundatis. 



8. Pyrus betulaefolia Bunge in Mem. Sav. Etr. Acad. Sci. St. 

 Petersb. II. 101 (Enum. PL Chin. Bor. 27) (1833).— Walpers, Rep. 

 II. 53 (1843).— Decaisne, Jard. Fruit. I. t. 20 (1872).— Maximowicz 

 in Bull Acad. Sci. St. Petersb. XIX. 172 (1873); in Mel, Biol. IX. 

 169 (1873).— Debeaux in Act. Soc. Linn. Cherbourg, XXXI. 156 (Fl. 

 Tchefou, 61) (1876).— Carriere in Rev. Hort. 1879, 318, fig. 68, 69 — 

 Hemsley in Jour. Linn, Soc. XXIII. 256 (1887).— Sargent in Card. & 



