Rzedowski, Jerzy; De Rzedowski, Graciela Calderon
April 1988
Acta Botanica Mexicana;abr1988, Issue 1, p7
Academic Journal
The presence of Larrea tridentata is reported from two additional localities in Mexico: in centrai part of the state of Guanajuato and in east-central part of the state of Querétaro. The existence of these populations favors the hypothesis of contraction and fragmentation of a formerly continuous distribution area.


Related Articles

  • LARREA INTERSPECIFIC HYBRIDS REVISITED (ZYGOPHYLLACEAE). Hunziker, Juan H.; Comas, Cecilia // Darwiniana;2002, Vol. 40 Issue 1-4, p33 

    Evidence from recent molecular studies suggested a reappraisal of genome relationships between Larrea ameghinoi and the other South American species of the genus. As a consequence, new attempts to study the meiotic pairing of the L. ameghinoi x L. cuneifolia hybrids were undertaken (2n = 3x =...

  • Variation in seedling freezing response is associated with climate in Larrea. Medeiros, Juliana; Marshall, Diane; Maherali, Hafiz; Pockman, William // Oecologia;May2012, Vol. 169 Issue 1, p73 

    Variation in freezing severity is hypothesized to have influenced the distribution and evolution of the warm desert evergreen genus Larrea. If this hypothesis is correct, performance and survival of species and populations should vary predictably along gradients of freezing severity. If freezing...

  • PROPUESTA DE UBICACION TAXONOMICA PARA LOS CHAYOTES SILVESTRES (SECHIUM EDULE, CUCURBITACEAE) DE MEXICO. Lira, Rafael; Castrejon, Javier; Zamudio, Sergio; Rojas-Zenteno, Carlos // Acta Botanica Mexicana;1999, Issue 49, p47 

    In this paper a taxonomic classification for the chayote, Sechium edule (Jacq.) Swartz, that includes two subspecies: S. edule ssp. edule and S. edule ssp. sylvestre, is proposed. Additionally, wild populations of the species are documented for the first time for the states of Querétaro and...

  • The role of carbohydrates in seed germination and seedling establishment of Himatanthus sucuuba, an Amazonian tree with populations adapted to flooded and non-flooded conditions. Ferreira, Cristiane da Silva; Piedade, Maria Teresa Fernandez; Tiné, Marco Aurélio Silva; Rossatto, Davi Rodrigo; Parolin, Pia; Buckeridge, Marcos Silveira // Annals of Botany;Nov2009, Vol. 104 Issue 6, p1111 

    Background and Aims: In the Amazonian floodplains plants withstand annual periods of flooding which can last 7 months. Under these conditions seedlings remain submerged in the dark for long periods since light penetration in the water is limited. Himatanthus sucuuba is a tree species found in...

  • MISSISSIPPI. Majure, Lucas C. // Castanea;Jun2007, Vol. 72 Issue 2, p121 

    The article provides information on plant species found in Mississippi. The Anemone quinquefolia was known previously only from Tishomingo County in the extreme northeastern portion of Mississippi. The Sanguinaria canadensis Linnaues was not recorded for the state but only reported as occurring...

  • Ecology and genetic diversity of the dense-flowered orchid, Neotinea maculata, at the centre and edge of its range. Duffy, Karl J.; Scopece, Giovanni; Cozzolino, Salvatore; Fay, Michael F.; Smith, Rhian J.; Stout, Jane C. // Annals of Botany;Aug2009, Vol. 104 Issue 3, p507 

    Background and Aims: Species may occur over a wide geographical range within which populations can display large variation in reproductive success and genetic diversity. Neotinea maculata is a rare orchid of conservation concern at the edge of its range in Ireland, where it occurs in small...

  • Foliar Sesquiterpene Variations in Natural Populations of Cupressus dupreziana in Tassili N'Ajjer (Algeria). Ramdani, M.; Lograda, T. // Asian Journal of Plant Sciences;2009, Vol. 8 Issue 1, p59 

    Cupressus dupreziana A. Camos (Cupressaceae) is an endemic species in the Tassili n'Ajjer (Algerian Central Sahara). Terpenoid analysis were carried out on 160 trees of 12 natural populations with a view to determining the intra-specific variability. Eighteen sesquiterpenes were detected,...

  • EXPANDED DISTRIBUTION OF ISOËTES BUTLERI (ISOËTACEAE) IN TEXAS. Taylor, Kimberly Norton; O'Kennon, Robert J.; Rehman, Tiana Franklin // Journal of the Botanical Research Institute of Texas;2012, Vol. 6 Issue 2, p753 

    More than 125 Isoëtes butleri populations are reported from 11 additional counties in north central Texas. These collections bridge the 450 km disjunction between Oklahoma and central Texas records. SEM examination of megaspore ornamentation and size confirm the determination. Descriptions of...

  • Bamboozled. Entwise, Tim // Nature Australia;Summer2004, Vol. 28 Issue 3, p72 

    Deals with the bamboo population in Australia. Information on the three species of bamboo in the country labeled as native; Explanation on the flowering of bamboos; Observation on the endemicity of Bambusa arnhemica in Australia.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics