83 



Robinia pseudacacia pyramidalis Petz. & Kirchn. Pyramid Locust.. 



Robinia pseudacacia pendula (Ortega) Loud. Weeping Locust. 



Robinia pseudacacia inermis (Jaeq., Sudw. Parasol Locust. 

 Robinia pseudacacia spectabilis (Du Mont Cour.) Koch. Thornless Locust. 



Robinia pseudacacia latisiliqua Loud. Broadpod Locust 



Robinia pseudacacia dissecta (Koch) Sarg. Cutleaf Locust. 



Robinia pseudacacia glaucescens Koch. Blue Locust. 



Robinia pseudacacia aurea (Koch) Dipp. Goldenleaf Locust. 



Robinia pseudacacia purpurea Dipp. Purpleleaf Locust, 



Robinia pseudacacia argenteo-variegata (Koch) Sudw. Spotted Locust. 



Robinia neo-mexicana Gray. New-Mexican Locust. 



Range. — Colorado (from Purgatory River) through northern New Mexico and 

 Arizona (to Santa Catalina and Santa Rita mountains) and to southern Utah (near 

 Kan ah and in Mount Zion Canyon, west fork of Rio Virgen River). 



Name in use. — Locust (Ariz., N. Mex.). 

 Robinia viscosa Vent. Clammy Locust. 



Range. — Mountains of North Carolina. Widely naturalized hy cultivation east of 

 the Mississippi River. 



Names in use— Clammy Locust (Mass., E. I., N. Y., N. J. 9 Pa., N.C. r 

 S. 0., La., Miss., 111.) ; Honey Locust (N. Y., N. J.) ; Bed-flowering Locust 

 (Ala.); Rose-nowering Locust (Tenn.); Rose Acacia (Vt., R. I., Pa.). 



VARIETIES DISTINGUISHED IN CULTIVATION. 



Robinia viscosa albiflora Dipp. White-flower Clammy Locust 



Robinia dubia Fouc. 

 Robinia bella-rosea Nichol. 



OLNEYA Gray. 

 Olneya tesota Gray. ■ Sonora Ironwood. 



Range. — Southern California (from Colorado River south of Mohave Mountains) 

 to southwestern Arizona and through adjacent Mexico (Sonora) and Lower California 

 (between Comundee and Calaunujuet). 



Names in use.— Iron Wood (Cal.); Arbol de Hierro (Call); Palo de 

 Hierro (Ariz.). 



ICHTHYOMETHIA Browne. 

 Ichthyomethia piscipula (Linn.) Kuntze. Jamaica Dog-wood, 



PlSCIDIA ERYTHRINA Linn. 



Range. — Southern Florida (Biseayne Bay on east coast, and on the west from 

 Pease Creek to Cape Sable) and southern keys; West Indies and southern Mexico. 



Name in use. — Jamaica Dogwood (Fla.). 



Family ZYGOPHYLLACEJ!. 



GUAJACUM Linn. 

 Guajacum sanctum Linn. Lignum- vitae. 



Range. — Florida keys from Key West eastward (upper and lower Metacombe 

 keys. Lignum vitae Keys, I "mbrella Keys) ; Bahamas, San Domingo, and Puerto Rico. 



Names in use.— Lignum-vitae (Fla.); Ironwood (Fla.). 



