230 JOURNAL OF THE ARNOLD ARBORETUM [vol. iv 



B. vulgaris commutata Regel, 1. c. 413. — A form with a very mixed 

 synonymy comprising partly forms of vulgaris from North America, partly 

 probably of true canadensis, partly very uncertain forms. 



B. vulgaris var. virgata Hort. ex Zabel in Verz. Miind. 6 (1878), nom. 



nud. 



B. vulgaris u. B. antinocarpus Hort. ex Mouillefert, Traite Arb. Arbriss. 

 i. 147 (1891). — "Ne differe pas sensiblement du type." 



During the last ten years some extremely interesting and valuable 

 hybrids have been raised by the late Dr. van Fleet in his garden at Bell 

 Station, Maryland. Dr. van Fleet who was one of the most skillful of 

 American plant breeders was kind enough to send me some material in 

 1916. On April 26, 1919, I had the opportunity to pay a visit to Bell 

 where I saw a good many more hybrids, and received information and 

 material from Dr. van Fleet himself. I intended to make a thorough 

 study of all these forms, but owing to my departure for Europe in Sep- 

 tember, 1919, I have not been able to collect more material at Bell, and 

 complete my observations. At present I cannot do more than mention 

 the crosses of which I have seen the plants and of which I possess at 

 least some sterile or flowering material in my herbarium. I can only hope 

 that after the death of Dr. van Fleet these plants were not lost. Somebody 

 else may be able to look them over, and to give full descriptions of them 

 based on copious flowering and fruiting material. There are among 

 these hybrids some plants of high value. The best, so far as I have seen, 

 is the following, which I want to name in honor of its raiser. 



X B. Vanfleetii, hybr. nov. (Z?. Veitchii X vulgaris). 



Frutex compactus ad 1.5 m. altus ramis squarrosis paullo dependentibus; 

 raniuli annotini obscure brunnescentes subangulati, biennes palhde 

 flavescentes minutissime pustulati, fere cylindrici, vetustiores cinerascentes; 

 internodia 1.5-2 cm. longa; spinae satis evolutae, 3-fidae, flavescentes, 

 subtus sulcatae, mediae ad 2.5 cm. longae, lateralibus paullo longiores. 

 Folia subsempervirentia, 3-4-fasciculata, matura crasse chartacea vel 

 subcoriacea, elliptica vel obovato-elliptica apice acuta, basi in petiolum 

 subnullum vel ad 5 mm. longum contracta, margine subsinuato-spinoso- 

 serrata dentibus gracilibus utrinque circiter 8-12 ad 1.5 mm. longis 

 minimis exceptis ad 3.5-1.4 cm. magna, superne saturate viridia, subtus 

 pallida, pruinosa, utraque facie laxe elevato-reticulata. Inflorescentiae 

 breviter umbellato-racemosae fioribus singulis additis, 4-9-florae, ad 2.5 

 cm. longae; pedicelli graciles, superiores circ. 5 mm. infimi ad 10 mm. 

 longi, bracteis parvis triangularibus acutis acuminatisve 1-1.5 mm. longis; 

 flores lutei, aperti ad 6-7 mm. diametientes. Fructus elliptici, circiter 

 8-10 : 6 mm. magni, esty lares, ccrasini, leviter pruinosi; semina 4, atro- 

 purpurea, circiter 7 mm. longa, lacvia. 



