f 



Vermischte neue Diagnosen. g^^ 



the latter being minutely and retrorsely or spreading tomentulose. The 

 leaves of JB. interior are almost invariably trifoliolate and the three 

 leaflets give the whole leaves a characteristic regular appearance wan- 

 ting in the eastern and middle western plants. — This seems to be the 

 native midland Box-elder and extends from the western slopes of the 

 Appalachian Mountain system to the foot-hills of the Rocky Mountains 

 and north of the Ohio River and Missouri. The tree seems to be 

 more hardy than the eastern one, and has been found more often in 

 cultivation, 



1026. Rulac interior (Britton) Nieuwl., 1. c, p. 139. — Acer interior 



Britton, 1908. — Rulac texana Small, 1903, Secundum descriptionem, vel 



saltem in parte. — Negundo Fraocinus Bourg., 1859, probabiliter, sed nomen 

 nudum. 



1027. Rulac Kingii (Britton) Nieuwl., 1. c, p. 139. — Acer Kingi Brit- 

 ton, 1908. 



1028. Rulac californica (Torrey et Gray) Nieuwl., 1. c, p. 139. 

 Acer cdlifornicum (Torrey and Gray) Dietrich. — Negundo californicum 

 Torrey and Gray, 1838, 1840. — Inclusive of Bidac californica var. texana 

 Pax Bvlac texana (Pax) Small. This plant is only a less densely pubes- 

 cent form of B. californica and can hardly be considered as a variety, 



califi 



Native of Cali- 



> 



" 1 



fornia along the coast of the Pacific Ocean, especially in the southern 

 part of the State extending into Mexico. 



1029. Rulac mexicana (DC.) Nieuwl., 1. c, p. 140. — Xegundo mexi- 

 canum DC., 1824. — Acer mexicnum (DC.) Pax, 1886, not Acer mexicanum 

 A. Gray, 1861. — This species differs rather notably from all the fore- 

 going by its regularly sharply serrulate oval or ovate leaflets. These 

 are always trifoliolate and densely silky tomentose beneath. — It is 

 native of Southern Mexico, and specimens found in Guatemala are 

 typical in every way except the larger size of the leaflets. 



1030. Crula Nieuwl., I. c, p. 140. — Arbores andro-monoicae cum 

 foliis pinnatis trifoliolatis: discus bene evolutus et crassus exirastaminalis; 

 gemmae perulae interiores elongatae: stamina 8 saepissime elongata 

 medio disco inserta vel cum disco extra staminibus; petala evoluta, se- 

 Pala libera; foliola minime lobata; inflorescentia in ramulis terminalibus 

 foliosis insita; styli usque ad basim distincti, prope ad alas bene divari- 

 cati: flores praecoces, fertiles spicati, vel racemosi, vel corymbosi vel 

 pauci umbellati — PerAsiamOrientalem dispersa, Chinam, Coream, 

 Japoniam et Mandschuriam. - The plants difl^er from Bulac in being 

 andro-monoecious and the flowers in terminal clusters. The leaves are 

 always pinnately trifoliolate, never deeply lobed, usually thm serrate or 

 entire. The stamens are 8-10. and the flowers complete with a thick 

 prominent extrastaminal disk. The stamens in Rulac are 4-6. the 

 flowers apetalous and always diclinous, in different plants. The name 

 is an anagram of Rtdac The following are known species, all oriental 



u-m. \ 



-' - ■ 



J V 



*i -■-- 



