162 



JOURNAL OF THE ARNOLD ARBORETUM 



[VOL. Ill 



Vaccinium Buergeri; V. ciliatum; *V. fragile; *V. hirsutum; V. hir- 

 tum var. Smallii; V. japonicum; V. membranaceum ; *V. moupinense; 

 *V. praestans; V. scoparium; *V. urceolatum. 



Viburnum betulifolium; V. bitchuense; *V. bracteatum; V. buddlei- 

 folium; *V. Canbyi; *V. cinnamomifolium; V. cylindricum; *V. dasyan- 

 thum; V. Davidii; V. erosum; *V. erubescens var. Prattii; V. foetidum 

 var. rectangulum ; *V. furcatum; V. Henry i; V. hupehense; V. ichangense; 

 *V. kansuense; V. lobophyllum; *V. lobophyllum var. flocculosum; *V. 

 molle; V. mongolicum; V. phlebotrichum; V. propinquum; V. rhytido- 

 phyllum; V. Sargentii; *V. Sargentii f. flavura; V. shensianum; V. thei- 

 ferum; *V. urceolatum; V. utile; V. Veitchii; *V. Wilsonii; V. Wrightii. 



Vitis amurensis; XV. Baileyana; V. betulifolia; V. Coignetiae; V. 

 Davidii; V. Davidii var. cyanocarpa; V. flexuosa; V. flexuosa var. 

 parvifolia; V. pentagona; *V. pentagona var. bellula; V. Piasezkii; V. 

 pulchra; V. reticulata; *V. Thunbergii var. sinuata; V. vinifera (form 

 cultivated at Peking). 



Whipplea modesta. 



*Xylosma racemosum var. pubescens. 



Zanthoxylum alatum var. planispinum ; Z. Bungei; Z. dissitum; *Z. 

 Piasezkii; Z. piperitum; Z. setosum. 



The following hybrid trees and shrubs have been made at the Arbore- 

 tum or have appeared in it spontaneously: 



Roses 



Arnoldiana 



Dawson 



Farquhar 



Ida 



Lady Duncan 



Minnie Dawson 



Pauline Dawson 



Jacksonii 



Sargent 



Seashell 

 W. C. Egan 



Aesculus Harbisonii 

 Cornus arnoldiana 

 Berberis notabilis 

 Betula Jackii 



Malus arnoldiana 

 Malus Dawsoniana 

 Prunus arnoldiana 

 Pterocarya Rehderiana 



Forsythia intermedia var. primulina Pyrus congesta 

 Hypericum arnoldianum 



Hyj)ericum Dawsonianum 

 Hypericum nothum 



Loniceraamoena var. arnoldiana 



Rhododendron Anneliesae 

 Rhod. obtusum v. arnoldianum 

 Sorbus arnoldiana 

 Viburnum Jackii 



HAWTHORNS. 



During the last twenty-three years special attention has been given at 

 the Arboretum to the study and cultivation of North American Hawthorns. 

 Previous to 1899 some twenty species and varieties only had been recog- 



nuin 



