Six new combinations with change of status are proposed to reflect the interrelationship as well as the singularity of the taxa: Dalbergia glabra var. chontalensis, D. glabra var. paucifoliolata, D. retusa var. cuscatlanica, D. retusa var. hypoleuca, D. retusa var. lineata, and D. retusa var. pacifica. One variety, D. calderonii var. molinae, is described as new. Most species of Mesoamerican Dalbergia were originally described from one or a few specimens. As more material has become available gradation of characters has become evident. Many of the differences between taxa are subtle, and there is considerable intergradation. In some cases reduction in rank appears to be warranted; in one, differences are deemed worthy of recognition as a new variety. Dalbergia glabra (Miller) Standley var. chontalensis (Standley & Williams) Rudd, comb. et stat. nov. Basionym: Dalbergia chontalensis Standley & Williams, Ceiba 1: 81. 1950. TYPE: Nicaragua. Chontales: vecindad de Juigalpa, en matorrales de una cuesta rocosa, alt. 160 m, 4-13 June 1947, Standley 9296 (holotype, F). Dalbergia glabra (Miller) Standley var. paucifoliolata (Lundell) Rudd, comb. et stat. nov. Basionym: Dalbergia paucifoliolata Lundell, Contr. Univ. Michigan Herb. 4: 8. 1940. TYPE: Mexico. Tabasco: Reforma on the Rio San Mgrtir above Balancan, on river bank, 22-26 May 1939, Matuda 3167 (holotype, MICH). Dalbergia retusa Hemsley var. cuseatlaniea (Standley) Rudd, comb. et stat. nov. Basionym: Amerimnon cuscatlanicum Standley, J. Wash. Acad. Sci. 13: 442. 1923. TYPE: El Salvador. San Salvador: 1923, Calderdn 1557 (holotype, US). Dalbergia retusa Hemsley var. hypoleuca (Pittier) Rudd, comb. et stat. nov. Basionym: Dalbergia hypoleuca Pittier, J. Wash. Acad. Sci. 12: 62. 1922. TYPE: Costa Rica. Alajuela: El Escobal, near Atenas, Golcher 1747 (holotype, US, originally in John Donnell Smith herbarium). Dalbergia retusa Hemsley var. lineata (Pittier) Rudd, comb. et stat. nov. Basionym: Dalbergia lineata Pittier, J. Wash. Acad. Sci. 12: 63. 1922. Amerimnon lineatum (Pittier) Standley, J. Wash. Acad. Sci. 13: 442. 1923. TYPE: Costa Rica. Guanacaste: Nicoya, Apr. 1900, Tonduz 13969 (holotype, US). Dalbergia retusa Hemsley var. pacifica (Standley & Steyermark) Rudd, comb. et stat. nov. Basionym: Dalbergia pacifica Standley & Steyermark, Field Mus. Nat. Hist., Bot. Ser. 22: 236. 1940. TYPE: Guatemala. Suchitep~quez: Cocales, roadside, 215 m, 5 Jan. 1939, Standley 62109 (holotype, F). Dalbergia calderonii Standley var. molinae Rudd, var. nov. TYPE: Honduras. Morazin: floresta de nubes area Rancho Quemado, suroeste de San Juancito, 2000 m, 19 June 1948, Molina 1040 (holotype, F). Arbores nubiculae a varietate typica foliis plerumque longis, foliolis parviis numerosisque differunt. Trees 4-8 m high. Leaves (11-)13-15-foliolate, the axis about 15-20 cm long. Leaflets 4-6 x 1.52.5 cm, elliptic, obtuse to acute. Flowers cream to orange-yellow, 4.5-5 mm long. Fruit brown-velutinous, 7-8 x 1.5 cm, the stipe about 8-10 mm long. Dalbergia calderonii var. calderonii occurs at lower elevations and different habitat than variety mrnolinae (350-850 m in low to medium deciduous forest vs. ca. 1300-2100 m at the edge of cloud forest); it bears leaves with fewer leaflets ((3-)59(-11)-foliolate, with an axis 6-10 cm long vs. (11-) 13-15-foliolate, with an axis ca. 15-20 cm long); and its fruits have a shorter stipe (ca. 5 mm long vs. ca. 8-10 mm long). Paratypes. HONDURAS. Morazinm: bosque de nubes, entre Santa Lucia y Valle de Angeles, 1800 m, Molina 3301 (F); Montafia La Tigre, suroeste de San Juancito, 2100 m, Molina 10661 (F); edge of cloud forest, mountains above San Juancito, 2000 m, Williams & Molina 13328 (F). NICARAGUA. Jinotega: bosque de la entrada a Aranguez, 1300-1400 m, Araquistain 3640 (MO). Matagalpa: road to Aranguez, pasture and patches of cloud forest, 1360-1380 m, Stevens et al. 17067 (MO); cloud NovoN 5: 368-369. 1995. This content downloaded from 157.55.39.35 on Mon, 29 Aug 2016 05:09:20 UTC All use subject to http://about.jstor.org/terms Volume 5, Number 4 Rudd 369 1995 Mesoamerican Dalbergia forest area, Sta. Marfa de Ostuma, between Matagalpa and Jinotega, 1300-1500 m, Williams et al. 23442 (NY). This variety is named in honor of Antonio Molina R., Honduran botanist, following a suggestion by P. H. Standley and L. O. Williams in an unpublished herbarium name. Acknowledgment. I am indebted to Joy Nishida for her help in preparing this manuscript for publication. This content downloaded from 157.55.39.35 on Mon, 29 Aug 2016 05:09:20 UTC All use subject to http://about.jstor.org/terms