ROSACEAE. — SORBUS 469 
Sehneider referred Pratt's specimens to the very different Sorbus 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 em. longis; foliola inde a pari tertio v. quarto deorsum, a pari 
septimo, octavo v. nono sursum subdecrescentia, basi obtusissima v. 
hine subaeuta, anguste oblonga, media 1.3-2 em. longa, 0.4-0.7 em. 
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. haud reticulato-striata. Inflorescen- 
tiae pleraeque ramulos brevissimos laterales, paucae ramum elongatum 
terminantes, 3.5-7 em. 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-)11-13-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 
