246 JOURNAL OF THE ARNOLD ARBORETUM [vol. iv 



round Kyoto. It is in fact a common plant in Japanese gardens where 

 according to Matsumura it is known as Shichidankwa. There are a 

 number of garden forms cultivated of which "fimbriata" and "rubro- 

 plena" are examples. There seems no good reason for keeping Kegel's f. 

 prolifera distinct from the type. 



In Thunberg's Herbarium the specimen named Viburnum serratum a. 

 represents the var. stellata but I do not think that this specimen should be 

 considered the type since Thunberg does not cite under his description 

 any particular specimen and since the majority of them belong to the 

 form here considered the typical //. serrata DC. 



NEW SPECIES, VARIETIES AND COMBINATIONS FROM THE 



HERBARIUM AND THE COLLECTIONS OF THE 



ARNOLD ARBORETUM 1 



Alfred Rehder 



Sinowilsonia Henryi Hemsley in Hooker's Icon. xxix. t. 2817 

 (1906).— Rehder & Wilson in Sargent, PL Wilson. I. 429 (1913). 



Descriptioni adde: Elores monoeci, proterandri, racemosi; racemi ter- 

 minates, masculi et feminei plerique in ramis distinctis; racemi masculi 

 praecoces, e gemmis aphyllis tcrminalibus orti, pedunculo brevi 5-8 mm. 

 longo incluso 4-6 cm. longi, penduli, multiflori, densi; rhachis sparse 

 fusco-stellato-pilosa; flores apetali et sine ullo vestigio ovarii, bracteati 

 bracteis lineari-subulatis pedieellum panllo superantibus sparse fusco- 

 stellato pilosis a basi pedicelli plerisque plus minusve remotis; pedicelli 

 sparsissime stellato-pilosi, 1.5-3 mm. longi, bracteolis 2 lateralibus 

 bracteis simillimis sed brevioribus plerisque circa medium insertis instructi; 

 sepala 5, lineari-spathulata, 3-4 mm. longa, antheras vix vel paullo super- 

 antia, dorso apicem versus dense fusco-stellato-pilosa, post anthesin 

 recurva, plus minusve irregulariter inserta et non stricte verticillata; 

 stamina 5, episepala, filamentis brevissimis basi sepalorum adnatis, an- 

 theris anguste ovalibus 2.5 mm. longis apiculatis rimis lateralibus dehis- 

 centibus: racemi feminei densi, sub anthesi in plante nostra 1.5-2.5 cm. 

 longi, demum multo elongati; flores cum stigmatibus inclusis 5 mm. longi; 

 calycis tubus sub anthesi 1.5 longus et ovarium paullo tantum superans; 

 sepala 2 mm. longa; stigmata violacea. 



The flowering for the first time in this Arboretum of Sinowilsonia Henryi 

 offered an opportunity to study the hitherto unknown staminate flowers, 

 which, as the description shows, are greatly simplified in their structure. 

 The flowers are arranged in catkin-like racemes very similar in appearance 

 to those of some Amentaceae, particularly to certain Poplars. The whole 

 floral structure appears more or less irregular; the bracts are inserted, 



1 Continued from p. 116. 



