Borrichia ×cubana

Britton & S. F. Blake

Mem. Torrey Bot. Club 16: 116. 1920.

Treatment appears in FNA Volume 21. Treatment on page 131. Mentioned on page 130.

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

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.

Lower Taxa

None.

"broader" is not a number.

... more about "Borrichia ×cubana"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
John C. Semple +
Britton & S. F. Blake +
bristlelike +
coroniform +
cuneate +
compound +  and simple +
ovate;obovate;ovate;obovate;oblanceolate;linear +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
hairy +  and glabrous +
3-4-angled +
fertile +  and bisexual +
fertile +  and bisexual +
Fla. +  and West Indies (Cuba) +
0–10 m +
sericeous +  and puberulent or glabrate +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Sandy and rocky coasts +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.8 cm8 mm <br />0.008 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
hemispheric +
0.7 cm7 mm <br />0.007 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
5mm;7.5mm +
2.5mm;3.5mm +
sessile +  and petiolate +
4cm;10cm +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
lance-triangular +
dentate +  and serrate +
toothed +  and entire +
2-carpellate +
persistent +
cupular +  and coroniform +
Flowering late spring–summer. +
16 +  and 25 +
unequal +  and subequal +
Mem. Torrey Bot. Club +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined (tribe Undefined) subtribe Enceliinae +, Undefined (tribe Undefined) subtribe Engelmanniinae +, Undefined (tribe Undefined) subtribe Spilanthinae +, Undefined (tribe Undefined) subtribe Verbesininae +  and Undefined (tribe Undefined) subtribe Zinniinae +
Borrichia ×cubana +
Borrichia +
species +
cylindric +
shorter to longer than campanulate +
toothed +  and entire +
shrub +  and subshrub +