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| Agave garciaruizii A. Vázquez, Hernández-Vera & Padilla-Lepe
in Hernández-Vera, Vázquez-García, Padilla-Lepe & Nieves-Hernández, 2019.
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Abstract
A new species named Agave garciaruizii is described and illustrated here. A. garciaruizii is endemic to tropical dry forest in the Itzícuaro and Apupátaro river canyons in the Chorros del Varal State Reserve, at the southern border of the states of Jalisco and Michoacán, México. It belongs to the subgenus Littaea and to the Marginatae species group and is morphologically related to A. angustiarum and A. impressa, but differs from these species in some features of leaves, inflorescences and infructescences. Its conservation status was assessed as Endangered (EN). Additionally, morphological evidence was provided in support of A. arcedianoensis as a species distinct from A. angustiarum. A key to morphologically and geographically closely related species in the Marginatae group is presented.
Keywords: Agavoideae, Agavaceae, Nueva Galicia, Los Reyes de Salgado, Santa María del Oro, Monocots
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| FIGURE 2. Agave garciaruizii. A. Habit. B. Flower buds. C. Developing flower. D. Fully grown flower. E. Withered flower. F. Developing gynoecium. G. Capsules. H. Portion of flowering stem. I. Nearly mature capsules. J. Dehisced capsules. K. Leaves. L. Leaf with marginal teeth. M. Basal peduncular bracts.
A–F, H, K and L–M from the type material. J from Vázquez-García 10140b.
Drawing by Esau Vázquez Verdejo.
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| FIGURE 3. Agave garciaruizii in the Itzícuaro River canyon, Manuel M. Diéguez, near the southern border between Jalisco and Michoacán. A–B, Rosette, C–D Leaves. E. Spine, F. Gerardo Hernández near a small rosette. G–H. Leaf margin and teeth variability.
A, C & H from Hernández-Vera 72 (field labeled: p29-3); B, D–E & G from Hernández-Vera 69 (field labeled; p28-1).
Photographs A–E and G–H by Gerardo Hernández-Vera, Sep. 2002; and F by M. Cházaro, September 2002.
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| FIGURE 4. Agave garciaruizii in the Río Apupátaro (also known as Palo Verde) canyon. A. Flowers. B. Flower buds. C. Flower bud, D. Opening flower. E. Flower fully extended. F. Habit in flower, hold by Ignacio García-Ruiz, with a waterfall of the Río Apupátaro in the background and Bursera in the front. G. Jesús Padilla-Lepe holding the flowering segment of the inflorescence.
All pictures from the type material. Photographs: A–E, G. by J. A. Vázquez-García, March 2017; F by J. Padilla-Lepe, March 2017.
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| FIGURE 5. Agave garciaruizii A. Developing fruits, B. Dehisced fruits, C. Flower after anthesis, D. Initial development of fruits, E. Opened capsules. F. Rosettes in their habitat. G. Past flowering, coexisting with Senecio sp.
B–E from Vázquez-García 10140b. C–D from the type material. Photograph A & G. by Ignacio García-Ruiz, March 2017; B–F by J. A. Vázquez-García, March 2017.
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Agave garciaruizii A. Vázquez, Hernández-Vera & Padilla-Lepe sp. nov.
Eponymy:— The species is named after Ignacio García-Ruiz, distinguished botanist who advocated the study of
the flora of Michoacán and senior author of the flora of the Chorros del Varal State Reserve, where this species was
discovered.
Gerardo Hernández-Vera, J. Antonio Vázquez-García, Jesús Padilla-Lepe and Gregorio Nieves-Hernández. 2019. Agave garciaruizii (Asparagaceae) A New Species from the Chorros del Varal State Reserve in western Mexico. Phytotaxa. 422(3); 273–288. DOI: 10.11646/phytotaxa.422.3.7
Resumen: Se describe e ilustra una especie nueva llamada Agave garciaruizii. A. garciaruizii es endémica del bosque seco tropical
en los cañones de los ríos Itzícuaro y Apupátaro en la Reserva Estatal Chorros del Varal, en el límite sur de los estados de
Jalisco y Michoacán, México. Pertenece al subgénero Littaea y al grupo de especies Marginatae. La especie propuesta está
relacionada morfológicamente con A. angustiarum y A. impressa, pero difiere de estas especies en algunas características
de las hojas, inflorescencias e infructescencias. Su estado de conservación fue evaluado como En Peligro (EN). Además, se
proporcionó evidencia morfológica en apoyo de A. arcedianoensis como una especie distinta de A. angustiarum. Se presenta
una clave para las especies relacionadas morfológicamente y geográficamente en el grupo Marginatae.
