22 WILSON EXPEDITION TO CHINA 



Mongolia: Tatarinoff (ex Maximowicz). Chili: near Kalgan, Ladyshinski 

 (ex Maximowicz). 



Of this variety I have seen no specimen; it differs according to Maximowicz in 

 its smaller leaves and flowers and shorter styles. 



Deutzia grandiflora, var. y glabrata Maximowicz in M6m. Acad. Sci. St.Peters- 

 bourg, s6r. 7, X. No. XVI. 31 (1867) 

 Chili: near Pekin, Tatarinoff. 



24. Deutzia prunifolia Rehder, n. sp. 



Frutex erectus ramuUs junioribus glabris pallide fusco-brimneis, vetustioribus 

 griseo-brunncis. Gemmae perulis circa 10 exterioribus, ovato-lanceolatis acutis, 

 extus sp^se stellato-pilosis, castaneis. Folia ovata, v. rhombico- v. elUptico- 

 ovata, acuminata, basi late cuneata, inaequaliter v. fere dupliciter fimbriato-den- 

 ticulata, dentibus minutis acuminatis, 3.5-5 cm. longa et 1.5-3 cm. lata, flavo- 

 viridia, concoloria, supra pilis 4-5-radiatis laxe conspersa, subtus glabra pilis 

 simpUcibus ad costam mediam et paucis ad basin costarum lateraUum exceptis, 

 interdum facie pilis rarissimis 5-radiatis instructa, utrinsecus costis 5-7 supra im- 

 pressis subtus elevatis; petioli glabri, 3-5 mm. longi. Flores desunt. Capsulae 

 1-3 in apice ramulorum, solitariae pedicellis glabris gracilibus circa 1 cm. longis, 

 binae v. ternae pedunculo 1-1.5 cm. longo insidentes pedicellis circa 5 mm. longis; 

 capsula (immatura) depresso-globosa, circa 5 mm. diam., extus glabra, semisupera, 

 apice ovarii et basi stylorum 3-4 sparse stellato-pilosa, dentibus calycis lanceolatis 

 reflexis tubum saltern aequilongis partim persistentibus. 



Korea: Ping Yang, September 18, 1905, J. G. Jack (Herb. Arnold Arboretum). 



Closely related to D. grandiflora Bunge, and particularly to its glabescent variety 

 7 glabrata which, however, differs in the shorter petioles, the shorter scarcely acum- 

 inate teeth of the leaves, and their less prominent venation, in the hairs of the upper 

 surface having usually 5-6 rays and those of the lower surface 6-8 rays and also in 

 the shorter peduncles and pedicels. Deutzia hamata Koehne, which is similar in 

 foliage, differs in the peculiar development of the pubescent calyx. 



25. Deutzia hamata Koehne in Bot. Jahrb. XXXIV. No. LXXV. 37 (1905). 

 Shantung: Laushan Mts., Zimmermann (Nos. 335, 348 ex Koehne). 



This species is well marked by the peculiar development of the calyx which hag 

 the margin incurved forming a hollow ring open toward the apex of the ovary and 

 partly covering it; the spreading lanceolate calyx-lobes are borne on the outside of 

 the ring. 



Subsect. 5. COREANAE Rehder, n. subsect. 



Distinguished from all the other Deutzias by the solitary or rarely two flowers 

 appearing from leafless buds and borne on short stalks hidden by the bud-scales; 

 calyx-tube ovoid, truncate at the apex with short triangular lobes; styles slender, 

 3; leaves on both sides sparingly covered with hairs with 4-5 rays. 



26. Deutzia coreana L6veill(5 in Fedde, Rep. Sp. Nov. VIII. 283 (1910). 

 Korea: Diamant Mts., June 1908, U. Faurie (No. 364); Pouck Han, Seoul, 



September 25, 1905, J. G. Jack. 



The leaves are sparingly furnished on both sides with stellate hairs, those of the 

 upper side having generally 4, those of the under side generally 5 rays; the capsule 

 is about 4 mm. long, distinctly longer than broad and thinly covered with stellate 

 Lairs having 6-7 rays; styles 3.10 mm. long. 



Sect. II. MESODEUTZIA Schneider in Mitt. Deutsch. Dendr. Ges. XIII (1905). 



27. Deutzia mollis Duthie. See p. 13. 



28. Deutzia corymbosa R. Brown apud Royle, III. Bot. Himal. 216, t. 46, fig. 2 



