Hesperaloe campanulata G.D.Starr is the bell-flowered hesperaloe — a compact, charming species from south-western Texas and north-eastern Mexico that bridges the gap between the delicacy of Hesperaloe parviflora and the structure of Hesperaloe funifera. Described by Greg Starr in 1997, it is named for its distinctly campanulate (bell-shaped) flowers — broader and more open than the narrowly tubular blooms of other species. The flowers range from pink to white, giving the plant a softer, more pastel appeal than the coral-red parviflora.
Taxonomy and nomenclature
Described by Greg D. Starr in Madroño 44: 293–296 (1997), alongside Hesperaloe tenuifolia, in a paper that expanded the genus from five to seven recognised species. The epithet campanulata (Latin: “bell-shaped”) refers to the broadly campanulate flowers. Family Asparagaceae, subfamily Agavoideae.
Morphological description
A compact, clump-forming rosette similar in size to Hesperaloe parviflora but with a habit more reminiscent of Hesperaloe funifera: stiffer, more erect leaves of a pale green colour, longitudinally rolled, bearing the characteristic marginal fibres. The flowers are bell-shaped, broader than in other species, pink to white, produced in summer on tall panicles. Polycarpic. The Dave’s Garden article on hesperaloes notes that this species “only flowers in summer” — a shorter bloom season than the months-long display of Hesperaloe parviflora.
The species has also been identified as a potential paper-pulp source alongside Hesperaloe funifera.
Distribution and natural habitat
South-western Texas and north-eastern Mexico. Limestone hills and canyon margins at moderate elevations in the Chihuahuan Desert. The habitat is broadly similar to that of Hesperaloe parviflora but with a tendency towards more specifically calcareous, well-drained rocky substrates.
Cultivation guide
| Hardiness | −10 to −12 °C / 10–14 °F (USDA zone 8a–8b) |
| Light | Full sun |
| Soil | Well-drained; limestone soils ideal |
| Water | Very low |
| Availability | Uncommon; specialist nurseries, botanical garden exchanges |
The Dave’s Garden article notes cold tolerance down to approximately 10 °F (−12 °C) — significantly less than Hesperaloe parviflora but still very respectable. Cultural requirements are similar to other hesperaloes: full sun, excellent drainage, minimal water. The compact size and softer flower colour make it an interesting alternative to Hesperaloe parviflora for gardeners seeking subtlety rather than spectacle.
References
Starr, G.D. (1997). Two new species of Hesperaloe (Agavaceae) from Mexico. Madroño, 44(3), 293–296.
POWO (2026). Hesperaloe campanulata G.D.Starr. Plants of the World Online, Kew.