238 JOURNAL OF THE ARNOLD ARBORETUM [vol. iv 



through the winter in a sheltered situation but never flowers. The 

 H. Hortensia e. ramis atropurpureis K. Koch (Hort. Dendr. 106 [1853]) 

 probably belongs here. 



A form with double flowers is: 



Hydrangea macrophylla f. Domotoi Wilson, n. comb. 



Hydrangea Domotoi K. in American Florist, 1923, 861. 

 Hydrangea Otaksa Domotoi Hort. Dreer & Sons. 



The flowers of this form are all sterile and double, lavender to blue in 

 color. It is said to have originated as a sport from /. Otaksa and is recog- 

 nized here as the type of a race with double flowers. 



The phylogenetic type may be named: 



Hydrangea macrophylla var. normalis Wilson, n. var. 



Japan: Hondo, Oshima Island, E. H. Wilson, No. 8197, March 29, 1917; same 

 locality, //. Suzuki, No. 8197a, July, 1917; Boshu peninsula, between Hojo and 

 Kanaya, E. II. Wilson, No. 8207, April 11, 1917; Hachijo Island, E. II. Wilson, 

 No. 8383, May 6, 1917. 



This is the wild type and is distinguished by its flat corymb of hermaph- 

 rodite flowers with a few outer sterile pink ray-flowers each from 3 to 5 cm. 

 in diameter. The fruit is stout, yellow-brown and erect, narrow-ovoid, 

 (i S nun. long, 3-4 mm. wide, ribbed, crowned by 3 diverging woody styles 

 from 1-3 mm, long; pedicels rigid 7-10 mm. long. The habit, the char- 

 acter of the shoots and the shape and texture of the leaves are all similar 

 to those of the sterile form. The number of ray flowers with petaloid 

 sepals is variable and so, too, is their size, and their color is of varying 

 shades of pink to rosy-red, occasionally bluish or white. 



This is a littoral plant abundant on the coasts of Oshima or De Vries' 

 Island and the Boshu peninsula on the east coast of central Hondo and 

 not far from the port of Yokohama. It is also plentiful on Hachijo 

 Island, a volcanic island south of Oshima, and on Aogashima, another 

 island just south of Hachijo. My friend, Dr. T. Nakai, informs me that 

 he has found it wild on North Sulphur Island which is south of the Bonin 

 Islands; also that it grows on the seacoast of Idzu and Sagami in central 

 Hondo. I found the plant first in fruit and young foliage in March 1917 on 

 Oshima and in the July following, my friend, II. Suzuki, collected for me 

 flowering material. In the autumn of the same year I obtained ^vaU 

 from which plants were raised and are now growing in this Arboretum. 

 On Boshu and Hachijo I saw this plant growing in great quantity and 

 that it is truly indigenous in these places there can be no doubt. Should 

 anyone be disposed to question this as to Boshu and Oshima owing to 

 their proximity to such a centre of culture as Tokyo I do not see how they 

 an question Hachijo which is an out-of-the-way, sparsely inhabited island 

 strewn with blocks of lava Under the old regime when the Emperor 

 lived in Kyoto and the Shogun in Tokyo, Hachijo was used as a penal 

 settlement. Nevertheless, it is extraordinary that the identity of this 

 plant as the wild parent of the familiar garden Hydrangea with globose 



