1924] REHDER, NEW SPECIES, VARIETIES AND COMBINATIONS 235 



Forrest collected specimens of this tree in Yunnan where it would appear 

 to be more common than farther north. The tree I saw had rough firm 

 gray bark, rather slender, spreading branches which formed a flattened 

 round crown. Fortunately it bore ripe fruit and I was able to send a good 

 supply of seeds to the Arnold Arboretum. These were widely distributed 

 and germinated freely. A plant raised from these seeds flowered for the 

 first time in cultivation in the nursery of P. J. Berckmans Company, 

 Augusta, Georgia, early in May, 1917; in August of this year it flowered 

 for the first time in England in the garden of Mr. J. C. Williams at 

 Caerhays. With its terminal heads of white, fragrant flowers with protrud- 

 ing genitalia it is a singularly handsome tree. It has not proved hardy 

 in the Arnold Arboretum and requires a mild genial climate in which to 

 thrive. 



NEW SPECIES, VARIETIES AND COMBINATIONS FROM THE 



HERBARIUM AND THE COLLECTIONS OF THE 



i 



ARNOLD ARBORETUM 



Alfred Rehder 



Juglans notha (J. regia X Sieboldiana) , hybr. no v. 



Arbor ramis patentibus comam rotundatum formantibus; ramuli auranti- 

 aco-flavidi vel cinereo-brunnei, puberuli et sparse crispo-pilosuli, secundo 

 anno glabrescentes. Folia petiolo glanduloso-puberulo et crispo-pilosulo 

 8-10 cm. longo incluso 30-50 cm. longa, 7-9-foliolata; foliola elliptica vel 

 oblongo-elliptica, 8-14 cm. longa et 4.5-7.5 cm. lata, terminate late ellip- 

 ticum, 12-15 cm. longum et 8-11 cm. latum, apice subito breviter acu- 

 minata, basi obliqua truncata, remote et minute denticulata, supra glabra, 

 subtus ad costam, venas et sparse ad venulas glanduloso-pubescentia, 

 utrinque venis 10-15 instructa. Amenta mascula 4-5 cm. longa; flores 

 bractea pubescente et perigonii lobis minute puberulis, filamentis brevis- 

 simis, antheris oblongis apice crista truncata instructis. Fructus sub- 

 globosus glanduloso-puberulus et pilosulus; mix globoso-ovoidea, circiter 

 3.5 cm longa, basi truncata, apice subito acuminulata, sutura elevata 

 subalata, facie rugosa areolis vix elevatis, vel in altero specimine gibboso- 

 rugosa et interdum in utraque parte leviter 3-costata; paries ossea lacunis 

 4 majoribus et 4 vel 5 minoribus instructa; dissipimentum osseum, circiter 

 1 mm. crassum, lacunosum, mediam nucem aequans vel paullulo superans. 



Specimens examined: Arnold Arboretum, cultivated under no. 14777 

 A. Rehder, October 9, 1921 and May 20, 1924; Hort. R. Bates, Jackson, 

 South Carolina, W. G. Bixby, October 19, 1919 (as "Siebosian Walnut"). 



This hybrid was raised in this Arboretum in 1878 from seed sent by 

 A. Lavallee from Segrez, France. Of the seedlings raised two trees have 

 been growing here ; one of them, which is now dead, was typical J. Siebol- 



i Continued from p. 59. 





