476 WILSON EXPEDITION TO CHINA 



shan, woodlands, alt. 2300-9000 m., October 1908 (No. 864^); 

 without locality, 1890, A. Henry (No. 8975). 



The smallest leaved of all the species of Sorbus. The greatest contrast to it is 

 found in S. Sargentiana Koehne which has the leaves up to 28 cm. and the leaflets 

 up to 13.5 cm. long. 



SORBORUM CHINENSIUM CONSPECTUS ANALYTICUS. 



Though I have studied almost all the Asiatic species of Sorbus in order to under- 

 stand the Chinese species, and though I know also the European and North 

 American species, I find it impossible to divide the genus into well characterized 

 sections. There are, however, groups of allied species which stand out more or 

 less clearly, but I have not succeeded in characterizing these groups distinctly or 

 in making them include other than Chinese species, because the characters are too 

 variously distributed, and of many species important characters are still unknown 

 owing to the want of sufficient material. To arrange, however, at least for the 

 present paper, the Chinese species in a way to indicate their affinities, I have dis- 

 tinguished certain groups without naming them. To give them now definite names 

 would be unwise, as this would seem to indicate that species other than Chinese 

 could be included in the arrangement without changing the characterization of 

 the groups. This, however, is not possible. 



Stipulae saltem supremae intra inflorescentiae basin insigniter dilatatae, herbaceae. 

 Inflorescentiae magnae, 9-20 cm. latae (in S. discolore diametro ignoto), 

 floribus numerosissimis, in S. discolore tantum paucis. Fructus intense* rubro- 

 aurantiaci v. miniati, in S. pekinensi pallidi (in S. discolore, Wilsoniana, 

 Giraldiana, pluripinnata colore ignoto) ; carpidia apice villosa v. lanata. 



Folia ad summum 8-juga; petioli 2.5-6.5 cm. longi; rhachis exalata, interstitiis 

 1.3-4 cm., nonnisi in S. expansa 0.8-1.4 cm. longis; foliola media majuscula 

 V. maxima (3.5-13.5 cm. longa, 0.8-3.9 cm. lata), acutissima simul apice 

 angustata v. subacuminata; epidermis subtus papillosa v. raro nonnisi 

 reticulato-striata. Inflorescentiae pleraeque ut videtur e rami longioris apice 

 ortae. Carpidia 3 v. 4, inde a placenta segregata, nonnisi in S. Giraldiana 

 semiconnata 1. Group. 



Folia 10-13-juga; petioU 1.5-2.2 cm. longi; rhachis superne angustissime v. vix 

 alata, interstitiis 0.5-1 cm. longis; foliola media majuscula v. parvula (1.5- 

 4 cm. longa, 0.5-0.8 cm. lata), obtusa v. acuta, marginibus insigniter parallelis; 

 epidermis subtus vahde reticulato-papillosa. Inflorescentiae saepius ut videtur 

 6 ramulorum lateralium abbreviatorum apice ortae. Carpidia 3, 4, 5, inde a 



placenta segregata v. tota fere connata, apice lanata 2. Group. 



Stipulae parvae, herbaceae paucidentatae v. siccae lanceolatae linearesve. In- 

 florescentiae plerumque laxiusculae v. laxissimae, interdum vero densiflorae 

 v. e glomerulis densifloris compositae. Fructus verisimiliter semper albi v. 

 rosei v. pallide purpurascentes (sed colore adhuc ignoto in <S. tapashana, 

 Helenae, laxiflora, Prattii, aestivali, glomerulata, pogonopetala) . 



Ramii crassi, 5-8 mm. diam. Stipulae siccae, angustae; folia 3-11-juga; rhachis 

 plerumque manifeste alata, interstitiis 1-2.5 cm. longis; foliola media 2.5- 

 9.5 cm. longa 0.8-3.5 cm. lata, acutissima v. breviter cuspidata; epidermis 



1 Meaning such branches as are found on herbarium specimens either with 

 flowers or fruits. 



