ROSACEAE. — SORBUS 273 



flavescentes v. nibescentes, omnino glabrae. Folia decidua, oblonga v. obovato- 

 oblonga, acuminata, basi rotundata v. late cuneata, margine dupliciter dcnticulato- 

 serrata dentibus parvis glanduliferis margine revolutis, 8-13 cm. longa et 3.5-5.5, 

 rarius ad 6 cm. lata, supra luteo-viridia, glabra, subtus dense tomento albido 

 arete adpresso lanuginoso costa et nervis flavidis glabris exceptis obtecta, nervis 

 utrinsecus rectis in dentes exeuntibus 12-14; petioli glabri, flavidi, 8-15 mm. longi. 

 Inflorescentia fructifera parva, fructibus inclusis circiter 2 cm. alta, sparse lanugi- 

 nosa V. fere glabra, fructibus 1-3 ; pedicelli breves, 2-4 mm. longi; fructus subglobo- 

 sus, circiter 8 mm. diam., ut videtur ruber, sparse lenticellis pallidis notatus, calyce 

 persistente sepalis recurvis anguste triangularibus acutis intus basi excepta lanu- 

 ginosis partim deciduis coronatus, basi et apice sparsissime lanuginosus, trilocu- 

 laris, loculis in fructibus dissectis sterilibus; styli 3, fere ad basin divisi, basi ut 

 videtur, lanuginosi. 



Hupeh: without precise locality, A. Henry (No. 6830). 



This species is very closely related to S. pallescens Rehder, but is easily distin- 

 guished by its larger lenticellate fruit and by the glabrous petioles and the glabrous 

 underside of the midrib and lateral veins. It is apparently still closer related to 

 S. cuspidata Schneider, on account of its larger lenticellate 3-celled fruit. 



2. Sorbus pallescens Rehder. See p. 266. 



3. Sorbus Dunnii Rehder, n. sp. 



Arbor, verisimihter; ramuli hornotini initio fulvo-lanuginosi, mox glabri, demum 

 fusco-purpurei, vetustiores fusci v. fusco-cinerei ; gemmae non visae. Folia decidua, 

 elliptico-oblonga v. oblonga, acuta v. breviter acuminata, basi late cuneata, inae- 

 qualiter serrulata dentibus minutis glanduliferis margine revolutis, 6-8 cm. longa 

 et 2.5-4 cm. lata, supra glabra, subtus dense tomento lanuginoso albido in costa 

 venisque fulvescente et detergibili vestita, nervis utrinsecus circiter 10 angulo 

 valde acuto divergentibus rectis in dentes excurrentibus; petioli 1-1.5 cm. longi, 

 tomento fulvo detergibili obtecti. Inflorescentia multiflora, circiter 5 cm. diam. et 

 4-5 cm. alta, tomento fulvescente lanuginoso obtecta, rachi glabrescente lenticel- 

 lata; pedicelli 2-5 mm. longi ut receptaculum turbinatum dense tomentosi; sepala 

 triangulari-ovata, acutiuscula, 1.5 mm. longa, extus tomentosa, intus glabra; 

 petalalate ovalia, 4 mm. longa, basi truncata, brevissime unguiculata, alba, glabra; 

 stamina 20, longiora circiter 4 mm. longa, stylos superantia; discus cupularis, 

 glaber ; styli duo, fere ad apicem connati, glabri; carpella duo tota connata, infera. 

 Fructus desideratur. 



Fokien: without precise locality, Dunn's Exped., April to June 1905 (Herb. 

 Bot. Gard. Hongkong, No. 2597). 



This species seems to be most closely allied to Sorbus Hedlundii Schneider and S. 

 Aria Crantz; the former is easily distinguished by the larger leaves with 12-17 

 pairs of veins, by the 3-5 styles connate only for half their length and woolly at the 

 base and by the lanceolate sepals pubescent on both sides. S. Aria differs chiefly 

 in the more lobulate leaves more or less rounded at the apex and white-pubescent 

 on the midrib and the petiole, in the partly superior ovary, in the pubescence at 

 the base of the style and in the longer and narrower sepals. 



The plant described by Pampanini (in Nuov. Giorn. Bot. Hal. n. ser. XVII. 72 

 [1910]) as Pyrus Aria, var. Silvcstrii of which I have seen no specimen may rcj)re- 

 sent a distinct new species; it seems near S. Dunnii, but differs in the styles which 

 are densely tomentose at the base and connate to above the middle. 



The plant described by Ldveille (in Fedde, Rep. Spec. Nov. XIII. 341 [1914]) 

 as Sorbus Aria, var. Mairci with subscssile leaves green below is certainly no S. 

 Aria. 



