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Estudios Sobre Rubiáceas Mexicanas, XL
Tres nuevas especies del género Bouvardia Salisb. y la revalidación de una especie omisa de Centroamérica
Three new species belonging to the Bouvardia genus are recognised and described by the authors of the paper. B. lancifolia Borhidi et Salas-Morales of Oaxaca from the relationship of B. rosea Schltdl. of Central Mexico, the B. sinaloae Borhidi et E. Martínez Salas of Sinaloa, related to the B. sancaroli Borhidi et M. Martínez-Díaz of Tamaulipas and the B. tenuis Borhidi et Salas-Morales of Oaxaca related to the B. rzedowskii Terrell et S. D. Koch of Guerrero and Oaxaca proved to be new for science. Detailed studies of floral characters led to confirm the correct circumscription of the Bouvardia bouvardioides (Seem.) Standl. and its separation from the B. pallida Standl., a definitely valid species for the Mesoamerican flora, living in Guatemala and San Salvador. Consequently, B. bouvardioides has to be considered as an endemic of Central Mexico.
Estudios Sobre Rubiáceas Mexicanas, XLI
Tres nuevas especies del género Randia L.
Three new species belonging to the genus of Randia are recognised and described by the authors of the paper. The R. colimensis is an endemic of the Volcano Colima and surroundings, vicarious of R. xalapensis Mart. et Gal. largely distributed in the Sierra Madre Oriental from Tamaulipas and San Luis Potosí to Tabasco and Chiapas. R. dionisi and R. similis are strict endemics of Oaxaca, related vicarious species of R. laevigatoides Borhidi and R. loniceroides Dwyer et Lorence, respectively.
Four new species of the genus Bouvardia have been collected in the last years in the southernmost states, Oaxaca and Chiapas of Mexico. Three of them have short little white flowers with hariy corolla lobes in the adaxial face. They belong to the section Bouvardiastrum closely related to the recently described B. macdougallii Lorence and B. viticella Lorea-Hernández et Lozada-Pérez. The fourth one is a member of the section Bouvardioides with big white flowers and coriaceous, white-tomentose leaves, related to B. langlassei.
The monographic treatment of the genus Deppea Schltdl. et Cham. published in 1988 by Lorence and Dwyer turned to be a broad sense approach with 23 species, including several alien elements and forming a polyphyletic unit. It was criticised by Borhidi et al . (2004) excluding 6 species belonging to 5 different genera. Since that time a number of real Deppea species of original sense has been discovered and described. Actually, the genus comprises 31 species without the excluded ones. In this volume 6 new species, in this paper 4 new ones: D. foliosa , D. nitida , D. rubrinervis , D. tubaeana and a new combination, D. arachnipoda are published, followed by a rectified generic description and a new analytic key.
Two new Bouvardia species are described in this paper belonging to the subgenus Bouvardioides W. H. Blackwell, a large-flowered one from the Federal State of México, with short sessile leaves names as B. amplexicaulis, the other is a xeromophic but unarmed one originated from the dry areas of Oaxaca, closely related to B. erecta, with 4-angled shiny white stems, named as B. candidissima.Anew analytic key of the Bouvardioides subgenus is also annexed for identifying the species belonging here.
Estudios Sobre Rubiáceas Méxicanas XXXVII
Dos especies nuevas del género Randia L. (Gardenieae) en Oaxaca y Veracruz
Two new Randia species are described from the aculeata-complex, characterised by small leaves, flowers and fruits, the later with soft exocarpium. This group apparently has its diversification centre in Mexico represented actually by 19 species and 3 varieties. Randia crucis is a deciduous tree up to 6mhigh in Oaxaca, characterised by terminal pairs of spines and many-flowered lateral inflorescences with very small naked flowers and white tomentose hypanthium. Randia manglaris is a very special shrub of Veracruz, living in the mangrove bush, completely glabrous, characterised by lateral pairs of spines, few-flowered inflorescences and flowers with corolla lobes twice longer than the tube.
Estudios sobre Rubiáceas Mexicanas, XLII
Una nueva especie del género Arachnothryx (Rubiaceae, Guettardeae) en Jalisco, México
A new endemic species of the genus Arachnothryx was collected in the State Jalisco, (Mexico Central) related to A. jurgensenii (Hemsl.) Borhidi. With the new taxon the genus is represented by 60 species, 44 of them endemic to the Flora of Mexico.
Estudios sobre Rubiáceas Mexicanas, XLIII
Borreria myrtilloides (Rubiaceae, Spermacoceae) una nueva especie en Oaxaca
A new species named as Borreria myrtilloides (Spermacoceae tribe) was collected in the State Oaxaca (South Mexico) in the framework of the collecting program of SERBO. It is related to B. nesiotica B. L. Rob. of Baja California and the Socorro Island, but differs from all similar species by having perennial to subfrutescent habit, very small shiny leaves without lateral veins. It grows in pine-oak forests at an altitude of 2,000 m above sea level, forming a dense subshrubby herb layer. The new taxon may be an endemic one to the Flora of Mexico.
Estudios sobre Rubiáceas Mexicanas XLV
Bouvardia juarezana (Rubiaceae, Spermacoceae) una nueva especie en Oaxaca
A new species named as Bouvardia juarezana (Spermacoceae tribe) was collected in the State Oaxaca (South Mexico) at the foothills of the Sierra de Juárez near Oaxaca city. It belongs to the relation of B. erecta, a xeromorphic shrubby plant of the dry areas of Central Mexico, spreading from Puebla y Tlaxcala to Oaxaca, where it is represented by several closely related taxa, like B. candidissima Borhidi, E. Martínez et Salas-Morales 2011 and B. mitlensis Borhidi et Salas-Morales 2010. The difference between these species is in the shape and indumentum of the small leaves, the inflorescences and mainly in the hairiness of the corolla tube inside, which is an important distinctive feature in several species groups of the genus.
Estudios sobre Rubiáceas Mexicanas XLVI
Psychotria zapotecana (Rubiaceae, Spermacoceae) una nueva especie en Oaxaca
A new species named as Psychotria zapotecana (Spermacoceae tribe) was collected in the State Oaxaca (South Mexico) in the framework of the collecting program of SERBO. It is related to P. mirandae C. W. Hamilt. of Chiapas Veracruz and Guatemala, but differs from it by having shorter chartaceous leaves, green when dry with abaxially domatiate and hirsute limb and nerves, obtuse and mucronulate apex and 4-merous flowers.
