ROSACEAE. — SORBUS 469 



Schneider referred Pratt's specimens to the very different Sorhus microphylla 

 (Wallich) Decaisne. 



Sorbus munda Koehne, n. sp. 



Frutex 3.3 m., v. arbor frutescens 3.3-6.6 m. alta; rami 2-2.5 mm. 

 diam., nigricanti-fusci, nitiduli; gemmae 0.6-1 cm. longae, ovatae, 

 supra medium parce rufopilosae. Stipulae herbaceae sed parvae 

 circiter 5 mm. longae, ovatae v. rotundatae, paucidentatae, pleraeque 

 persistentes ; folia cum petiolo 1.3-2 cm. longo 7.5-13.5 cm. longa, 

 10-13-juga; rhachis superne anguste alata, glabra, interstitiis 0.5- 

 0.8 cm. longis; foliola inde a pari tertio v. quarto deorsum, a pari 

 septimo, octavo v. nono sursum subdecrescentia, basi obtusissima v. 

 hinc subacuta, anguste oblonga, media 1.3-2 cm. longa, 0.4-0.7 cm. 

 lata, obtusa v. acutiuscula saepe mucronata, basi v. tertia parte Integra 

 ceterum argutissime serrulata dentibus utrinsecus circiter 4-12, supre- 

 mis conniventibus, glabra v. subtus in costa pilosiuscula v. tota 

 facie laxe subrufo-arachnoidea, subtus pallide subcano-viridia, nervis 

 utrinsecus circiter 4-7 saepe obsoletis reticuloque teneris subtus 

 saturatius coloratis; epidermis supra laevis, subtus sat valide scabro- 

 papillosa, inter papillas parce v. baud reticulato-striata. Inflorescen- 

 tiae pleraeque ramulos brevissimos laterales, paucae ramum elongatum 

 terminantes, 3.5-7 cm. latae, 4.5-7 cm. longae, laxae pauciflorae, ut 

 videtur subconvexae, glabrae. Flores ignoti; carpidia 5, tota connata, 

 glabra; styli liberi, an ima basi pubescentes? Fructus globosus, ad 7 

 mm. diam., albus, sepalis subconniventibus. 



Distinguendae forsan formae duae: 



Sorbus munda, f. a. tatsienensis Koehne, n. f. 

 Foliola 10-12-juga, subtus glabra v. in costa tantum pilosiuscula. 

 Western Szech'uan: Tachien-lu, woodlands, alt. 2300-3300 m., 

 September 1908 (No. 991). 



Sorbus munda, f. b. subarachnoidea Koehne, n. f. 

 Foliola (10-)ll-13-juga, subtus laxe subrufo-arachnoidea. 

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

 2600-3000 m., October 1910 (No. 4323). 



Sorbus aestivalis Koehne, n. sp. 



Arbor tenuis ("thin tree ") 6.6 m. alta; rami 3 mm. diam., nigri- 

 cantes; gemmae ignotae. Stipulae herbaceae sed parvae, circiter 

 6 mm. longae, paucidentatae; folia cum petiolo 1.2-1.6 cm. longo 



