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A REVISION OF ARIOCARPUS (CACTACEAE). II. THE STATUS OF THE PROPOSED GENUS NEOGOMESIA
Author(s) -
Anderson Edward F.
Publication year - 1962
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1962.tb14989.x
Subject(s) - biology , pollen , genus , botany , interspecific competition , zoology
A nderson , E dward F. (Pomona Coll., Claremont, California.) A revision of Ariocarpus (Cactaceae). II. The status of the proposed genus Neogomesia. Amer. Jour. Bot. 49(6): 615–622. Illus. 1962.—The proposed monotypic genus Neogomesia is found to be similar to Ariocarpus in seed structure, seedling development, habitat, certain significant internal characters, chemistry, flowers, pollen, and chromosomes. The reported differences in a reole structure and fruits are unfounded, if the developmental stages of each are considered. The presence of extensive mucilage‐containing structures in Neogomesia is significant, because these structures have been reported previously only in Ariocarpus. Interspecific compatibility shows close genetic similarities between Neogomesia agavoides and the several species of Ariocarpus. The difference in structure of mature tubercles between Neogomesia and Ariocarpus is believed to be a variation in the location of growth and elongation with respect to the floriferous and spiniferous areolar areas. The author concludes that Neogomesia agavoides Castañeda should be placed in the genus Ariocarpus.