ROSACEAE. — SORBUS 457 
white, occasionally tinged pink); Changlo Hsien, cliffs, alt. 1300 m., 
May 1907 (No. 397, in part; bush, 3.25 m., flowers white). 
This variety is larger in every part and more vigorous than the type; the flowers 
are open in the centre on account of the longer and narrower claws of the petals. 
Here may be added a variety from Shensi: 
Exochorda r , var. Giraldii Rehder, n. var. 
Exochorda Giraldii Hesse in Mitteil. Deutsch. Dendr. Ges. XVII. 191, 219 
(1908), XVIII. 295, fig. (1909); in Fedde Rep. Spec. Nov. VIII. 347 (1910). 
A typo recedit foliis omnibus integris, rarissime indistincte crenato-serratis 
graciliter petiolatis petiolis ad 2.5 longis plerumque purpureis, ramulis pallide 
brunneis v. purpureis, fructibus turbinatis 13 mm. longis. 
The slender red petioles give to this variety a very distinct appearance; even at the 
end of the branchlets where the petioles of the type and of var. Wilsonii are hardly 
l em. long, they are in this variety about 2 cm. long. The leaves are of firmer 
texture only very rarely slightly serrate and smaller than those of the preceding 
variety which it resembles in flower and fruit. In the original description the 
flowers were described as “ rubro-maculata," but this is apparently an error, and 
the petals are normally white. 
Shensi: * Lao-y-san," 1897, G. Giraldi; '* Kin-qua-san," July 10, 1897, G. Giraldi; 
Tai-pei-shan, 1910, W. Purdom (No. 1); Moutan-shan, north-west of Han-cheng 
Hsien, 1910, W. Purdom (No. 361); * Hu-kia-scien," 1897, Hugh Scallan. 
SORBUS L. 
Subgen. AUCUPARIA. 
Determined by E. KOEHNE. 
Sorbus expansa Koehne, n. sp. 
Arbor 8-metralis; truncus 20 cm. diam; rami suppetentes crassi, 
9-8 mm. diam., sordide cinerei; gemmae 1.5-1.8 cm. longae, apice 
parce rufo-villosae. Stipulae herbaceae, magnae, 10-14 mm. latae, 
dentatae, dentibus seta decidua terminatis, autumno deciduae; folia 
cum petiolo 2.5-5 em. longo 9.5-18.5 em. longa, (6-)7-juga; rhachis ex- 
alata, densissime tomentoso-albicans v. -subochracea, interstitiis circi- 
ter 0.8-1.4 (-2) em. longis; foliola infima 2 minora, cetera aequilonga 
V. Suprema tantum subdecrescentia, basi primo aspectu acuta 
Sed revera hine anguste cordata (lobulo rhachin tegente), late 
lanceolata v. lanceolato-elliptica, majora 3.5-6 cm. longa, 0.9-1.3 
cm. lata, sensim angustata v. subacuminata acutissima mucronata, 
tertia V. dimidia parte integra, superne argute serrulata dentibus 
angustissimis v, fere subulatis porrectis utrinsecus circiter 6-18, 
Supra in costa nervisque densius ceterum parcissime v. haud albido- 
