Difference between revisions of "Borrichia ×cubana"
Mem. Torrey Bot. Club 16: 116. 1920.
FNA>Volume Importer |
FNA>Volume Importer |
(No difference)
|
Revision as of 19:48, 24 September 2019
Stems erect. Leaves (at least mid cauline) elliptic, 4–10 × 1–3 cm, margins dentate to serrate (at least mid portions, often undulate as well), faces sericeous to puberulent (hairs unequal) or glabrate. Heads borne singly. Involucres hemispheric, 7–11 mm. Phyllaries 16–25 in 3–4 series (obovate, apices cuspidate, indument similar to leaves). Paleae: apices cuspidate (not spine-tipped). Ray florets 14–25; laminae 5–7.5 × 2.5–3.5 mm. Disc florets 25–60; corollas 5–6 mm, lobes 1.5–2 mm. Cypselae 3–5 mm, 3–4-angled. 2n = 28.
Phenology: Flowering late spring–summer.
Habitat: Sandy and rocky coasts
Elevation: 0–10 m
Distribution
Fla., West Indies (Cuba).
Discussion
Borrichia ×cubana is a fertile F1 hybrid between B. frutescens and B. arborescens. It is found where the parental species are sympatric; backcrosses of the hybrid with either parent appear to be infertile.
Selected References
None.