Hesperaloe engelmannii Krauskopf ex Baker is the first species described in the genus after Hesperaloe funifera — named in honour of George Engelmann, the father of Chihuahuan Desert botany. Native to southern Texas and north-eastern Mexico, it is a hardy but infrequently cultivated species with greenish to reddish flowers that offer less ornamental impact than the vivid coral of Hesperaloe parviflora. For the collector, however, it represents an important piece of the genus’s diversity.
Taxonomy and nomenclature
Described by Krauskopf, validated by Baker. The epithet honours George Engelmann (1809–1884), the German-American botanist who described the genus Hesperaloe itself. Family Asparagaceae, subfamily Agavoideae.
Morphological description
Similar in size to Hesperaloe parviflora but with distinct flower colouring: greenish to reddish, less vivid than the coral-red of parviflora. Leaves are narrow with marginal fibres. The species forms clumping rosettes and is polycarpic. Detailed morphological data is limited in the horticultural literature.
Cultivation guide
| Hardiness | −12 to −15 °C / 5–10 °F (USDA zone 7+) |
| Light | Full sun |
| Soil | Well-drained; limestone-derived soils natural |
| Water | Very low |
| Availability | Infrequently cultivated; specialist nurseries |
Hardy, drought-tolerant and undemanding. Its cold tolerance places it alongside Hesperaloe funifera in the genus’s hardiness hierarchy. The muted flower colour explains its limited uptake in the ornamental trade compared to the flashier Hesperaloe parviflora. For collectors seeking to grow all available hesperaloes, it presents no particular difficulty.
References
POWO (2026). Hesperaloe engelmannii Krauskopf ex Baker. Plants of the World Online, Kew.