SAXIFRAGACEAE . — DEUTZIA 1 1 



morpha praeditum superantes; petala 10-14 mm. longa, extusplerum- 

 que purpurascentia; stamina dimidiis petalis vix longiora, exteriora 

 filamentorum dentibus antheram fere aequantibus v. superantibus, 

 interiora filamentis lanceolatis antheram longe superantibus; styli 

 stamina subaequantes. 



Western Szech'uan: Tachien-lu, alt. 1200-1800 m., May 1908 

 (No. 2893); Wa-ssu country, Wen-chuan Hsien, alt. 1200-1800 m., 

 July 1908 (No. 2890) ; Nin-tou-shan, west of Kuan Hsien, alt. 1200-1800 

 m., June 20, 1908 (No. 2900). 



Wilson's No. 2993, from which the description given above is drawn, is in its 

 characters clearly intermediate between D. glomeruliflora Franchet and D. longi- 

 folia Franchet, and I have no doubt that it is a hybrid between these two species, 

 both of which have been collected in the neighborhood of Tachien-lu. The other two 

 numbers seem closer to D. longifolia and may possibly represent a white-flowered 

 variety of that species, though they differ in the pubescence. The intermediate 

 character of the hybrid is most clearly shown in the hairs of the under side of the 

 leaves, which have 4-6 rays in D. glomeruliflora and 12-14 in D. longifolia, while in 

 No. 2993 they have 5-8 rays and in the other two numbers 8-10 rays. The flowers 

 are white in the first species, purplish outside in the second species, and slightly 

 purplish in No. 2993, while in the two other numbers they are white as in 

 D. glomeruliflora. In habit the hybrid resembles most the last named species. 



The species of Deutzia are known to hybridize easily in cultivation, and they 

 seem to do the same in a wild state if they have the opportunity, for besides the 

 hybrid described here, another hybrid, between D. discolor and D. mollis, described 

 below, has been collected in a wild state. 



Deutzia subsessilis Rehder, n. sp. 



Frutex 1.5 m. altus ramulis gracilibus, junioribus parcissime stellato- 

 pilosis, annotinis cortice detersili fusco praeditis. Gemmae perulis 

 ovatis aeutis stellato-pilosis. Folia membranacea, oblongo-ovata, 

 acuminata acumine obtuso mucronulato, basi rotundata, argute ser- 

 rulata, 3-6 cm. longa et 1.5-2.5 cm. lata, supra obscure viridia v. 

 flavo-viridia, pilis sparsis plerumque 4-radiatis conspersa, subtus 

 pallidiora, pilis 4-5-radiatis laxe conspersa et sub lente minute punctu- 

 lata, utrinsecus 4-5-costata; petioli in ramulis floriferis subnuUis, in 

 innovationibus circa 1 mm. longi, parce stellato-pilosi. Cyma pluriflora, 

 convexa, plerumque sessilis, parce stellato-pilosa; pedicelli graciles; 

 caljrx stellato-tomentosus, dentibus triangularibus tubo aequilongis v. 

 paullo longioribus trinerviis; petala oblonga, 10 mm. longa et 6-7 mm. 

 lata, alba, extus stellato-pilosa; stamina petala dimidia aequantia, fila- 

 menta exteriorum apice manifeste bidentata dentibus triangularibus 

 antheram breviter stipitatam subaequantibus, interiorum anguste 

 oblonga, antheram faciei interiori circa medium affixam gerentia; 

 styli 3, stamina subaequantes. Capsulae maturae desunt. 



