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ILLICIUM GUAJAIBONENSE, ELEVATED TO SPECIES RANK AND COMPARED WITH THE SUBSPECIES OF ILLICIUM CUBENSE (ILLICIACEAE) Walter S.Judd J. Richard Abbott Department of Botany 214 Bartram Hall P.O. Box 1 18526 Go Florida 32611, U.S.A. wjudd@botany. ufl. edu >f Florida Herbarium 379 Dickinson Hall Florida Museum of Natural History Florida 3261 1, U.S.A. jrabbott@botany. ufl. edu Ash ley MorriS Department of Biological Sciences University of South Alabama Mobile, Alabama 36688, U.S.A. ABSTRACT ubsp.guajaibonense has been re- ■collected on the slopes of Pan d< t Guajaibon, Pinar del Rio, Cuba. The sm In the course of fieldwork in the province of Pinar del Rio in western Cuba the second author collected a distinctive species of lllicium sect. Cymbostemon (see Morris et al. 2007) on the slopes of Pan de Guajaibon, on the western edge of the Sierra del Rosario. Subsequent study of these specimens (along with herbarium material oilllicium cubense A.C. Smith occurring in both western and eastern Cuba, as well as I. ekmanii A.C. Smith, I.floridanumJ. Ellis, J. hottense Guerrero, Judd & A. B. Morris, and I. parviflorum Michx. ex Vent., all of which belong to sect. Cymbostemon) have led to the realization that these Pan de Guajaibon plants, which had been described as a subspecies of lllicium cubense (Imkhanitskaya 1993; i.e., I. cubense subsp. guajaibo- nense), are better understood as a distinct species. Thus, we propose here the new combination lllicium guajaibonense for this distinctive Pinar del Rio entity. lllicium cubense, a Cuban endemic, was considered by Imkhanitskaya (1993) to be widely distributed on the island, and she grouped its rather variable populations into five subspecies. Our observations (based on 29 collections, excluding duplicates) suggest that these four subspecies, in addition to I. cubense subsp. guajaibonense, have consistent morphological differences (among many other polymorphic features) that correlate with their geographical distributions, and they are thus easily diagnosed. As discussed in more detail below, we found the epidermal features of the petiole and young stem to be especially useful in diag- nosing these entities (although distinctive floral features also occur in subsp. guajaibonense). Of these sub- species, I. cubense subsp. rangelense Imkhanitskaya, like subsp. guajaibonense, is restricted to western Cuba,

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ILLICIUM GUAJAIBONENSE, ELEVATED TO SPECIES RANK AND COMPARED WITH THE SUBSPECIES OF ILLICIUM CUBENSE (ILLICIACEAE)

Walter S Judd, J Richard Abbott and Ashley Morris
Journal of The Botanical Research Institute of Texas 2(2): 799-806 (2008)

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