ROSACEAE. — SORBUS 461 



Sorbus Sargentiana Koehne, n. sp. 



Arbor 6-10-metralis trunco 10-25 cm. diam., rami 5-8 mm. diam., 

 pallide olivaceo-cinerei; gemmae circiter 1.2 cm. longae, parcissime 

 villosae. Stipulae herbaceae, magnae, 10-17 mm. latae, dentatae, 

 saltem pro parte persistentes; folia cum petiolo (4-)5-7 cm. longo 

 (18-)22-28 cm. longa, (3-)4-5-juga; rhachis exalata, pubescenti- 

 tomentosa demum plus minus glabrata ac purpurascens, interstitiis 

 2.5-3.2 cm. longis; foliola pari infimo supremoque minore excepto 

 subaequalia v. aequalia, basi hinc rotundata illinc supra basin con- 

 tracta, oblongo-lanceolata, majora 8.5-13.5 cm. longa, 2.6-3.9 cm. lata, 

 longe sensim acuminata acutissima, tertia v. quarta parte Integra 

 superne argute serrata v. serrulata dentibus utrinsecus circiter 

 28-52, supra parce tenerrime villosa mox glabrata, subtus in costa 

 nervisque densius ceterum parce Janata demum glabrata, costa subtus 

 subochracea, nervis utrinsecus circiter 20-35 supra leviter demum 

 argute impressis subtus prominentibus, reticulo supra obscuro v. 

 parum impresso subtus demum pro parte prominente, chartacea v. 

 demum subcoriacea; epidermis supra laevis, subtus reticulato- 

 papillosa papillis brevibus v. brevissimis apice scaberrimis. In- 

 florescentia verisimiliter ramum longiorem terminans, 15 cm. lata, 

 8.5-10.5 cm. longa, convexa, confertiflora, lanato-tomentosa albi- 

 cans V. subochracea demum subglabra; flores mense Junio aperti; 

 cupula villoso-tomentosa, sepala glabra; petala circiter 3.5-4 mm. 

 longa, vix unguiculata, ovato-rotundata, medio supra pilis paucis 

 obsita, alba, staminibus subaequilonga v. parum breviora; carpidia 3 

 V. 4, raro 5, inde a placenta segregata, apice lanata. Fructus globosus, 

 circiter 5-6 mm. diam., scarlatinus v. rubro-aurantiacus, sepalis erectis. 



Western Szech'uan: Pan-lan-shan, west of Kuan Hsien, wood- 

 lands, alt. 2300-3200 m., June 1908 (No. 3011); Wa-wu-shan, 

 Hung-ya Hsien, alt. 2G00 m., September 14, 1908 (No. 887); Mupin, 

 woodlands, alt. 2000-2600 m., October 1910 (No. 4207). 



A remarkable species which hke S. insignis Hedlund {Pyrus insignis Hooker f.) is 

 apparently one of the most beautiful of the whole genus. 



Though Sorbus insignis, of which I have seen no si)ecimens, seems very similar 

 to S. Sargentiana, it is not probable that the two are identical, because it is rare 

 that China has a species in common with the Himalaya. A very large number of 

 Chinese plants have been referred indeed to Himalayan species, but mostly with- 

 out justification, for a closer study has shown almost always that the Chinese 

 species are well distinguished from the supposed Himalayan species. The number, 

 too, of species which are common to China and Japan is far smaller than has been 

 generally supposed. For example, of the 27 Chinese species of Sorbus not a single 

 one occurs in Japan. 



