Espeletia argentea 1, × 1,; KB. 0 references. taxon name. Espeletia argentea. taxon author · Aimé Bonpland · year of taxon name publication. Espeletia argentea is a species of plants with 41 observations. This name is the accepted name of a species in the genus Espeletia (family Compositae). The record Espeletia argentea f. phaneractis () Cuatrec .
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BoxSmithsonian Institution, Washington D. This is a very distinctive species, markedly different from most of the Espeletiopsis present in Colombia. The new species is closely related to Espeletiopsis caldasii and Espeletiopsis santanderensisbut differs in having 1— 4—6 —7 capitula, with very short peduncles, and capitula arranged in a compact or densely glomerate cyme.
With a total distribution area of less than 75 km 2this species is probably critically endangered or imperiled. With an estimated age of 2—4 million years Van der Hammen et al. The subtribe Espeletiinae Cuatrec. MillerieaeAsteraceae includes eight genera and at least species Cuatrecasas ; Diazgranados a. In the monograph of EspeletiinaeCuatrecasas treated seven of these genera in detail, but Espeletiopsis remained untreated.
This genus is diagnosed by axillary, monochasial, corymbiform-paniculate capitulescences, with branches, leaves and bracts spirally alternate, and involucres with gradual transition from sterile outer phyllaries to fertile inner phyllaries Cuatrecasas Currently the genus contains 22 species, two varieties, three forms and three described hybrids Diazgranados a.
The genus Espeletiopsis is distributed from the central Andes of Venezuela to the Cordillera Oriental Eastern Cordillera in Colombia, approximately from Only five species are found in Venezuela four of them endemic to the countrywhereas Colombia has 18 species. According to CuatrecasasEspeletiopsis represents a derived line of evolution within Espeletiinaebeing mainly adapted to lower elevations. Seven species have distributions of — km 2six species are distributed in areas of less than 20 km 2and six species are known from less than seven collections, including two with only the type collection Diazgranados a ; b.
Species of Espeletiopsis have not been studied thoroughly. In addition to general morphology and reports in inventories and floras, six species have studies on anatomy Carlquist ; Ortega ; Rock ; Torres de Ricardisix on chemistry Bohlmann et al.
The most studied species are Espeletiopsis corymbosa Humb. Still now, the area is floristically poorly known. Additional duplicates will be distributed to other herbaria, including US and MO.
Distribution map showing collections for Espeletiopsis diazii red circlesEspeletiopsis santanderensis blue zrgentea and Espeletiopsis caldasii green triangles. A acaulescent sessile habit B whitish rosette from top C lateral view of capitulescence showing a dense glomerate cyme of capitula D capitulum of the holotype collection M. Illustrations of Espeletiopsis diazii. A Ray corolla B disk flower C disc flower style D ray flower palea Argfntea disk flower palea F outer phyllary G inner sterile phyllary H transversal view of cypsela I dorsal view of cypsela.
Photomicrographs of Espeletiopsis diazii. A Fragment of anther with pollen grains B pollen grain C disc flower style with pollen grains D papillae of espelstia side of stigmatic branches, showing pollen grains. Sessile rosette of whitish appearance, related to Espeletiopsis santanderensisbut with smaller leaves, capitulescence compact with a dense glomerate cyme of 1— 4—6 —7 capitula and short peduncles, and disc flowers with corolla lobes glabrescent.
Excluding reproductive fspeletia, rosette 20—30 —50 cm tall. Adaxial face with indumentum whitish or silvery-sericeous, hairs aregntea mm long, very abundant in young leaves, becoming less dense and argenfea tomentose-velutinous in old leaves, giving them a greener appearance; costa prominent but secondary nerves invisible. Abaxial face with loose indumentum, silvery or whitish, with hairs up to 2 mm long; costa more prominent than from adaxial face, secondary nerves invisible.
Leaf sheaths narrowly-oblong, 2. Capitulescences 2—5, corymbiform, more or less coetaneous, axillary, emerging from the upper nodes, twice longer than the leaves, 15— 25—45 —60 cm long; indumentum abundant, lanose-sericeous white towards the base, becoming lanose whitish-yellowish towards the distal portion.
Espeletia argentea Humb. & Bonpl.
Capitula 1— 4—6 —7arranged in a compact or dense arggentea cyme in the distal 3—4 cm of the capitulescence; peduncles terete, short, 1 —3 cm long or less; with indumentum lanose whitish-yellowish, and portions of epidermis reddish. Fertile bracts linear or narrowly triangular, 2—2. Capitula radiate, subglobose, 2.
Ray flowers 30— 44—46 in 2 —3 series, yellow, Cypselae oblong, triangular, 2.
Pollen yellow when fresh, tricolporate, The area of distribution is less than 75 km 2. Other Espeletiinae found in the area are: Espeletiopsis diazii is a very distinctive species.
The laminae lack pseudopetioles and the sheaths are oblong, rectangular, not broadening toward the base, the features being rare in Espeletiopsis but characteristic of Espeletia sect. However, monochasial capitulescences with several alternate bracts along the scape place this species within Espeletiopsis.
Two of these Espeletiopsis angustifolia Cuatrec. The remaining eight species, all from Colombia, have yellow ligulae: However, only two of them i.
Espeletiopsis caldasii has capitulescences monocephalous, and Espeletiopsis santanderensis has capitulescences spreading Fig. A acaulescent sessile habit B lateral view of a section of the capitulescence, showing the long peduncles of the capitula C rosette from the top D capitulescence spreading and rosette M.
Espeletia argentea ·
We thank Lizeth Mantilla and Jessica Sarmiento, at that time students of the co-author, for their assistance and collaboration during the collecting expedition; Jan Barber, Vicki Funk and Mick Richardson for their constant support in the description of the new species of Espeletiinaeand Lauren Merchant for the illustrations.
We also thank the editor and reviewers for their comments. Collections were made under the permit No. Dspeletia Center for Biotechnology InformationU.
Published online Dec Mauricio Diazgranados 1 Dept. Author information Article notes Copyright and License information Disclaimer. Received Oct 4; Accepted Dec This article has been espeletix by other articles in PMC.
Open in a separate window. Taxonomy Espeletiopsis diazii M. Discussion Espeletiopsis diazii is a very distinctive species. Disc flowers with corolla lobes glabrescent or with a few hairs. Click here to view. Acknowledgements We thank Lizeth Mantilla and Jessica Sarmiento, at that time students of the co-author, for their assistance arentea collaboration during the collecting expedition; Jan Barber, Vicki Funk and Mick Richardson for their constant support in the description of the new species of Espeletiinaeand Lauren Merchant for the illustrations.
WoRMS – World Register of Marine Species – Espeletia argentea Humb. & Bonpl.
American Journal of Botany Revista Acad Colomb Ci Exact Frontiers in genetics 4: Universidad de los Andes.
Rache L, Pacheco J. University of Maryland, College Park. Studies on Neotropical Fauna and Environment Ann Naturhist Mus Wien Vuilleumier F, Monasterio M. High altitude tropical biogeography.
Articles from PhytoKeys are provided here courtesy of Pensoft Publishers. Support Center Support Center. Please review our sepeletia policy. Capitulescence spreading, of 15—20 cm in diameter, with 20—40 capitula, peduncles 3—7 cm long. Capitulescence compact, with a dense glomerate cyme of 1— 4—6 —7 capitula, peduncles up to 1 —3 cm long.