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Stauracanthus spectabilis Webb

S. genistoides subsp. spectabilis (Webb) Rothm.

Eng.: Gorse.   Spa.: Tojo.   Fre.: Ajonc.   Ara.: Chebroq.

Shrub up to 0.5-1.3 m in height, very ramose and spiny hermaphrodite. Branches opposite, subopposite and alternate, with 8 closely spaced T-shaped ribs, marking out very narrow valleys; when young usually opposite and sericeous, then rounded, not angular. Phyllodes 0.8-1.5 × 0.7-0.8 mm, opposite, subopposite or alternate, triangular, muticous, sericeous, with 3 ribs. Inflorescences racemiform, with 6-7 flowers, pedicellate, pedicel 2-3 mm, puberulous; bracts 2-2.5 × 1-2 mm, villous and bracteoles 3.5-4(6) × (1)2.5-4.5 mm, suborbicular, ovate or triangular-ovate, villous. Calyx 11-14 mm, bilabiate, densely sericeous, often with yellowish hairs; tube 3-3.5 mm; the upper lip 7-8 × 3.2-3.5 mm, split up to halfway of the calyx; the lower lip trifid with straight teeth 3.5-4 mm long. Corolla 12-15 mm, papilionoid, yellow; standard elliptic, emarginate at the apex, attenuated at the base, only just slightly sericeous on the upper half of the dorsal side; wings shorter than the standard and the keel; keel sericeous only along the lower margin and the upper portion of the dorsal side, the same length or slightly shorter than the standard. Androecium monadelphous. Ovary hairy. Pod 15-25 mm, ellipsoid, compressed, villous, with seeds that stand out, dehiscent, with 4-6 seeds. Seeds 2.3-2.4 × 2.3-2.4 mm, ovoid, brownish, with yellowish-white strophiole.

Flowering:

Almost throughout the year, but mainly from March to May.

 

Fruiting:

April to June.

Habitat:

Coastal forests and thickets on stabilised dunes with fine grain, in humid and subhumid bioclimate, sometimes in areas somewhat drier but with a coastal fog. On thermomediterranean floor with very dry summers.

Distribution:

It grows in the humid forests of Quercus suber, along Atlantic littoral and sublittoral areas of SW Portugal and NW Morocco (forests of Mamora, Temara and surrounding areas).

Conservation status:

A species with a small distribution area but in principle it is not considered threatened. Currently, it has not been assessed at a global level in the IUCN Red List of Threatened Species. In the Livre Rouge de la flore vasculaire du Maroc (Fennane, 2021) it has been considered as Vulnerable (VU).

Stauracanthus spectabilis. 1. José Quiles
Stauracanthus spectabilis. Twig with flowers. José Quiles.
Stauracanthus spectabilis. 2. Jesús Charco
Stauracanthus spectabilis. Back flower detail. Jesús Charco.
Stauracanthus spectabilis. 3. José Quiles
Stauracanthus spectabilis. Detail of apical twigs and flower. José Quiles.
Stauracanthus spectabilis. 4. Jesús Charco
Stauracanthus spectabilis. Twig with fruits (pods -legumes-). Jesús Charco.
Stauracanthus spectabilis. 5. José Quiles
Stauracanthus spectabilis. Detail of fruit (pod -legume-). José Quiles.
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