Umbilicus schmidtii

Cape Verdean navelwort
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Core eudicots
Order: Saxifragales
Family: Crassulaceae
Genus: Umbilicus
Species: U. schmidtii
Binomial name
Umbilicus schmidtii
Bolle, 1859

Umbilicus schmidtii, Cape Verdean navelwort, is a flowering plant in the family Crassulaceae, native to the Cape Verde Islands, it is an endemic plant and is listed as endangered by the IUCN.

Description

Umbilicus schmidtii is an unbranched erect perennial herb up to 25 cm high, glabrous in all parts. Basal leaves orbicular, peltate, up to 6 cm in diameter, somewhat succulent, margin slightly crenate to almost entire, petioles long. Cauline leaves smaller, shortly petiolated to almost sessile. Inflorescence long many flowered terminal raceme. Calyx much shorter than the corolla. Corolla brownish yellow, tubular; lobes short, lanceolate, acuminate.

The species is fairy similar to the Mediterranean Umbilicus horizontalis and also resembles the African U. botryoides. The taxonomic significance of U. schmidtii is uncertain.

Distribution and ecology

Umbilicus scmidtii is a western hygrophyte occurring on Santo Antão, São Nicolau,[2] Santiago and Fogo of the Cape Verde Islands. It is confined to small areas in the subhumid and humid zones, mainly between 800 m and 1600 m. The lower most records are 550 m on Fogo (Monte Palha, leg. Killian & Leyens) and at 600 m on Santo Antao (Sunding 1981) and the uppermost one at 2000 m on Fogo (Ormonde 1977). The plants grow on north to northeast facing, moist cliffs.Umbilicus schmidtii is infrequent even in suitable habitats and it is generally considered to be rare (R).

The genus

Umbilicus comprises 18 species of annual and perennial herbs with a characteristic foliage. The genus is distributed from the mid-Atlantic archipelagos, W Europe, the Mediterranean to Iran. It also occurs in some African mountains. In the Cape Verde Islands, the genus is represented by a single species described as endemic to the archipelago.

References

  1. ↑ "Umbilicus schmidtii". The IUCN Red List of Threatened Species. IUCN. 3.1. 2017. Retrieved February 24, 2018.
  2. ↑ Endemic plants of São Nicolau Archived 2009-05-20 at the Portuguese Web Archive
  • The endemic vascular plants of the Cape Verde Islands, W Africa, Sommerfeltia 24, 1997, C. Brochmann, Ø. H. Rustan, W. Lobin & N. Kilian, ISSN 0800-6865, ISBN 82-7420-033-0
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