SAXIFEAGACEAE. — HYDRANGEA 29 



Hydrangea Sargentiana Rehder, n. sp. 



Frutex roliustus bimetralis; ramuli juniores dense villosi et excre- 

 scentiis crebris e trichomatibus basi confluentibus purpurcis formatis 

 praediti. Folia ovato-oblonga, acuminata, basi rotundata v, interdum 

 subcordata v. late cuneata, inaequaliter et fere dupliciter ciliato- 

 dentata dentibus setaceo-acuminatis, 15-30 cm. longa et 6.5-16 cm. 

 lata, supra obscure viridia, scabro-strigosa, subtus dense villoso-hirta, 

 ad nervos hirto-pilosa excrescentiis purpureis intermixes; petioli 

 dense pilosi et excrescentiis purpureis instructi, 3-9 cm. longi. Cyma 

 fere plana, 12-16 cm. diam., densa, dense pubescens, e radiis oppo- 

 sitis congestis 7-13 composita; flores radiantes graciliter pedicellati 

 2.5-3.5 cm. diam. albi, sepalis 4, orbiculato-obovatis integris; sepala 

 florum fertilium late triangularia, tubo dimidio breviora; petala ovata, 

 mox caduca, apice interdum calyptratim coherentia, 2 mm. longa; 

 stamina breviora petalis aequilonga, longiora circa 4 mm. longa; 

 styli plerumque 3 v. interdum 2. Capsula hemispherica, leviter 10- 

 12-costata, apice truncata, 3 mm. diam.; semina elliptica, utrinque in 

 alam brevem contracta, striata, flavo-brunnea, circa 0.7 mm. longa. 



Western Hupeh: Hsing-shan Hsien, thickets, alt. 1500-1800 m., 

 August and December 1907 (No. 772). 



Adistinct species with large and handsome foliage similar to H. robusta Hooker 

 f. & Thomson, which is easily distinguished by its strigose pubescence, ovate 

 leaves, by the serrate sepals of the sterile flowers and the larger capsule. The allied 

 H. Rosthornii Diels also differs in its strigose pubescence and ovate leaves. 



Hydrangea villosa Rehder, n. sp. 



Frutex 1-3 m. altus ramulis junioribus albido- v. fulvo-villosis 

 angulatis. Folia elliptico- v. oblongo-lanceolata, acuminata, basi 

 cuneata, fimbriato-denticulata dentibus setaceo-acuminatis, 10-20 

 cm. longa et 3.5-6.5 cm. lata, supra obscure flavo-viridia, scabro- 

 strigosa pilis basi bulbosis, ad costam mediam pilis longioribus al- 

 bidis instructa, subtus pilis patentibus hirto-villosis incano-tomentosa, 

 ad nervos pilis ad 3 mm. longis et saepe, praesertim ad costam mediam, 

 fulvescentibus v. fulvis praedita; petioli villosi saepe pilis fulvis longis 

 patentibus interspersis, 1-4 cm. longi. Cyma convexa, interdum 

 plana, albido- v. fulvo-villosa, radiis oppositis 7-9 satis remotis 

 composita; flores radiantes graciliter pedicellati, 3-4 cm. diam., coeru- 

 lescentes, sepalis 4 orbiculato-obovatis plerumque crenulatis; pedi- 

 celli florum fertilium strigosi, tubum calycis glabri v. basi tantum 

 strigosi subaequantcs, dentibus triangularibus vix dimidium tubum 

 aequantibus; petala oblongo-ovata, acutiuscula, concava, patentia, 



