Calendula suffruticosa subsp. suffruticosa

Gonçalves, Ana Carla, Ouhammoud, Ahmed, Amirouche, Rachid, Santos, Conceição, Figueiredo, Estrela & Silveira, Paulo, 2023, A taxonomic revision of Calendula (Asteraceae) in Morocco, including some taxa from Algeria and Tunisia, Phytotaxa 605 (1), pp. 1-83 : 53

publication ID	https://doi.org/ 10.11646/phytotaxa.605.1.1
persistent identifier	https://treatment.plazi.org/id/E82AFC0A-157A-CA5B-66ED-FD7C81D1FA6D
treatment provided by	Plazi
scientific name	Calendula suffruticosa subsp. suffruticosa
status

Treatment

11l. Calendula suffruticosa subsp. suffruticosa View in CoL .

Description:––Perennial herbs. Stems (10) 16.5–25 (27) cm long, ascending to erect, sparsely glandular and non-glandular pubescent, very slightly white-arachnoid towards the base. Basal leaves (3.2) 5.1–6.5 (7.1) × (0.8) 0.9– 1.2 (1.4) cm, 0.4–0.6 mm thick, broadly lanceolate, apex obtuse to slightly acute, margins sinuate-dentate, sparsely glandular and non-glandular pubescence, slightly white-arachnoid in the margins. Capitula solitary, (3.4) 3.6–4.6 (5.2) cm diameter, concolorous, yellow. Outer achenes rostrate (11) 16–23 (26) × (1.3) 1.7–2 (2.2) mm, straight or slightly curved, normally without dorsal spines or muricate, rarely with a ventral basal tooth; middle achenes bialate (12.5) 13–17.3 (18) × (5.8) 6.3–8.8 (9.2) mm, lateral wings sub-entire to sinuate-dentate, with a rostrum (3) 3.6–7.4 (7.5) mm; more frequently cymbiform (8.8) 10.3–11.5 (14.5) × (6.7) 7.7–10.8 (11.8) mm, muricated dorsally, ventral wing smaller to subequal to lateral wings; sub˗cymbiform (6.7) 8.5–11.7 (12.8) × (8.2) 8.7–10.3 (10.8) mm, lateral wings sub-entire to sinuate-dentate; inner achenes vermiculate-alate (4.5) 4.8–7.3 (8.5) × (3.2) 3.3–4.7 (5.8) mm, and vermiculate-exalate 4.3–4.9 (5.3) × (1.3) 1.5–1.8 (2) mm, both circular to hemicyclic. Figure 18 View FIGURE 18 .

Habitat and distribution:—Limestone rocks at elevations of 10–20 m, near the sea, in semi-arid Mediterranean bio-climate. Endemic to Tunisia where it appears to be restricted to the coast of the Gulf of Tunis, occurring in Porto Farina (Ghar el Melh), Hammam-Lif, Korbous near Cap Bon.

Conservation status:— Data Deficient (DD) . Only one population (Ghar el Melh) was assessed. In this population the numbers of mature individuals are estimated to be <250, but the available information is inadequate to assess the extinction risk based on distribution and/or population numbers.

Chromosome number:— 2n = 32.

Genome size:—3.28 ± 0.07 pg.

Additional collections:— TUNISIA. Ariana: Ghar el Melh [Porto Farina], 10 m [37°10’ N, 10°11’ E], 11 April 2009, P GoogleMaps . Silveira 3038 (AVE!).