In the pinyon pine forests of the southern Sierra Madre Oriental — where the Mexican states of Querétaro and Guanajuato meet at 2,250–2,300 m elevation, and the dry landscapes of the Bajío transition into the mountainous east — a tree yucca grows among the pines that was formally described only in 2020. Yucca pinicola, named for its habitat (pinicola = “pine-dweller”), was published by Sergio Zamudio — the botanist most closely associated with the Flora del Bajío y de Regiones Adyacentes, one of the most comprehensive regional floras in Mexico — alongside Gabriela Aguilar-Gutiérrez in Brittonia. It belongs to section Sarcocarpa (the fleshy-fruited yuccas) and is related to Yucca filifera, Yucca schidigera, Yucca schottii, and Yucca treculeana. For the genus Yucca, the discovery of a new species in 2020 — in a relatively well-botanized region of central Mexico — is a reminder that the diversity of this group is not yet fully catalogued.
Quick Facts
| Scientific name | Yucca pinicola Zamudio |
| Family | Asparagaceae (subfamily Agavoideae) |
| Origin | Mexico: Guanajuato and Querétaro (endemic) |
| Adult size | Tree-like (details from protologue) |
| Hardiness | Unknown (estimated −5 to −10 °C based on elevation) |
| IUCN | Not assessed |
| Cultivation difficulty | Unknown (not in cultivation) |
Taxonomy and Nomenclature
Yucca pinicola was described by Sergio Zamudio and Gabriela Aguilar-Gutiérrez in 2020 (Brittonia 72(2): 158). The type specimen was collected by S. Zamudio and E. Zamudio (no. 11,000) on 26 March 1999 at the Municipio de Peñamiller, 2 km north of Cuesta Colorada, on the road to Pinal de Amoles, Querétaro, at 2,250–2,300 m elevation. The holotype is deposited at UAMIZ, with isotypes at CIIDIR, EBUM, ENCB, IBUG, MEXU, and QMEX.
Zamudio is the principal author of the Flora del Bajío y de Regiones Adyacentes — initiated by Jerzy Rzedowski (who described Yucca potosina) and continued by Zamudio as the most comprehensive regional flora covering central Mexico. The description of both Yucca pinicola and the spectacular Agave muxii in the same publication underscores the continued botanical richness of the region.
The specific epithet pinicola (from Latin pinus + -cola, “inhabitant”) means “pine-dweller” — referring to the species’ growth within pinyon pine forest (bosque de pinos piñoneros).
Classification. Zamudio places Yucca pinicola in section Sarcocarpa — the fleshy-fruited yuccas — and notes affinity with Yucca filifera, Yucca schidigera, Yucca schottii, and Yucca treculeana.
Nomenclatural status. POWO lists the species. WFO marks it as “unchecked” — reflecting the very recent publication date and the usual lag in global database validation for newly described taxa.
Family and subfamily. Asparagaceae, subfamily Agavoideae (APG IV, 2016).
Common Names
None established. The epithet “pinicola” could serve as the basis for “pinyon yucca” or “pine-forest yucca” in English.
Distribution and Natural Habitat
Yucca pinicola is known from the states of Guanajuato and Querétaro, in the southern portion of the Sierra Madre Oriental. The type locality — near Cuesta Colorada, Municipio de Peñamiller — is in the mountainous eastern part of Querétaro, where the Sierra Madre Oriental forms the backbone of the landscape and creates a rain shadow to the west.
The habitat is pinyon pine forest (bosque de pinos piñoneros) at 2,250–2,300 m. This is a distinctive montane woodland of the semi-arid Mexican highlands, dominated by small pines (Pinus cembroides and allies) growing on limestone substrate at the upper limit of the arid zone. Pinyon forest is a transitional ecosystem between the Chihuahuan Desert scrub below and the oak-pine forests above — a narrow elevational band where arid-adapted and montane species coexist.
This habitat is notable because most yuccas grow in open, sun-drenched environments — desert scrub, grassland, coastal sand. A yucca growing within forest, under a canopy of pines, is unusual and ecologically interesting.
Conservation
Not yet assessed by the IUCN. The restricted distribution (two states, pinyon forest habitat at a specific elevational band) suggests potential vulnerability. Pinyon forests in central Mexico face pressure from logging, overgrazing by goats, and land-use change. The species’ very recent description (2020) means it has received no conservation attention to date.
Relationship to Other Species
Zamudio’s placement in section Sarcocarpa with affinity to Yucca filifera, Yucca schidigera, Yucca schottii, and Yucca treculeana is significant: these are all substantial, caulescent, fleshy-fruited yuccas. The closest geographic analog may be Yucca queretaroensis — also endemic to Querétaro and adjacent states, also an IUCN-threatened species — though Yucca queretaroensis belongs to a different section. The two species share the same general region of the Sierra Madre Oriental but may occupy different elevational and habitat niches.
Frequently Asked Questions
Is it available in cultivation?
No. Yucca pinicola was described only in 2020 and is not known to be in cultivation anywhere outside its native habitat. Seeds and plants have not entered the horticultural trade.
Why was it only described in 2020?
The type specimen was collected in 1999 — it took over two decades between collection and formal description. This lag is common in Mexican botany, where the flora is so rich that new species descriptions often wait for comprehensive comparative work. The region around Peñamiller and Pinal de Amoles in Querétaro is an area of active botanical exploration, and new species continue to be discovered.
Reference Databases
Bibliography
Espejo Serna, A. & López-Ferrari, A.R. (1993). Las Monocotiledóneas Mexicanas: una Sinopsis Florística 1(1): 1–76. Consejo Nacional de la Flora de México.
Zamudio, S. & Aguilar-Gutiérrez, G. (2020). Dos especies nuevas de Asparagaceae (Agavoideae) de los estados de Guanajuato y Querétaro, México. Brittonia 72(2): 154–163. DOI: 10.1007/s12228-020-09613-0.