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1917] SCHNEIDER— NEW CHINESE PLANTS 399 



Yunnan occidentalis : inter Talifu et Tengyiieh, probabiliter in regionc 

 inter flumina Mekong et Salween, Octobri 1914, C. Schneider (no. 2613; typus 

 in Herb. Arb. Arn. et in Hb. Schneider). 



This is a very distinct looking plant, with its small, broadly ovate, almost 



subsessile leaves, and its few-flowered inflorescences which are borne on short 



lateral branchlets. It seems to be most closely related to D. subsessilis Rehd., 



t which may easily be distinguished by its much longer (up to 6 cm.), more 



oblong leaves whose stellate hairs of the under surface have only 4-6 rays, by 

 its larger and richer inflorescences, and bv its larger flowers. 



It is with great pleasure that I connect with this distinct species the name 

 of Mr. Alfred Rehder, the well known dendrologist of the Arnold Arboretum, 

 who (Sargent, PI. Wils. 1:1913) has given an excellent contribution to the 

 I knowledge of the genus Deutzia. 



i y^ Spiraea (Sect. Chamaedryon Ser.) teretiuscula, sp.n. — Frutex 



latus, ad 2 m. altus, laxe ramosus, ramis subnutantibus ; ramuli 



I hornotini flavescentes vel violascentes, vix sulcato-striati, puberuli, 



annotini rubro-brunnei vel fusci, teretiusculi, vetustiores cineras- 

 centes; gemmae ut videtur parvae, ovatae, perulis imbricatis pilosis 

 obtectae. Folia decidua, ovalia, obovalia vel ovato-elliptica, apice 

 rotundata, interdum fere subemarginata, minutissime apiculata, 

 basi plus minusve late cuneata, 6-1 1 mm. longa, 3-7 mm. lata, 

 margine integerrima, superne laete viridia, tantum novella minutis- 

 sime puberula, cito glaberrima, subtus discoloria, cinerascentia, 

 initio paullo distinctius pilosa, dein etiam glabra, sub microscopio 

 ut in S. canescenti papillosa, nervis utrinsecus 3-4 vix visibilibus; 

 petioli flavescentes, vix 1.5 mm. longi, puberuli. Corymbus circ. 

 25-florus, convexus, tomentosulus, ramulos normaliter plurifoliatos 

 1-3 cm. longos terminans, 1.5-2.5 cm. diametiens; flores albi, 

 circ. 5 mm. diametientes ; pedicelli graciles, floribus breviores, 

 tomentosuli; receptacula late turbinata. extus tomentosula, intus 

 pilosula; sepala late triangularia, receptaculis aequilonga, extus 

 glabra, intus ad apicem et ad marginem fulvo-villosula; petala 

 suborbicularia, circ. 1 . 5 mm. lata, sepala duplo superantia; stamina 

 20, petalis subaequilonga ; discus distinctus 10-lobatus, lobis apice 

 dorsoque leviter sulcatis; carpidia extus versus basim intus ad 

 ventrem sparse villosa, stylis apicalibus quam stamina subduplo 

 brevioribus. Fructus maturi ignoti. 



Szechuan australis: in regione Yen-yuan Hsien, inter viculos Ka-la-pa et 

 Liu-ku, in dumetis montanis, alt. circ. 3000 m., 17 Maji 19M, C. Schneider 



