Malacothamnus clementinus

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Malacothamnus clementinus, San Clemente Island endemic

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Malacothamnus clementinus , San Clemente Island endemic. Malacothamnus clementinus is a rare species of flowering plant in the mallow family known by the common name San Clemente Island bushmallow. It is known from fewer than ten occurrences in the steep, rocky seaside canyons. The plant became a federally listed endangered species in 1977 when it was limited to a single population nearing extinction due to herbivory by the feral goats which once infested the small island. The goats have since been removed and the plant is recovering well, but many threats still remain, including competition with introduced species of plants, wildfire, erosion, and damage to the landscape by United States Navy bombing exercises. Since the Navy removed goats from the island in the 1990s and started an intensive management program this species has recovered significantly. There are now over 80 known populations on the island consisting of over 1,500 individuals. In the last review of this species, the United States Fish and Wildlife Service recommended down listing this species due to its recovery and the ongoing management that the Navy has committed to. This is a bushy shrub with a thin, multi-branched stem coated in long, fine hairs. It reaches heights between 40 centimeters and one meter. It bears rounded dark green leaves several centimeters long which are divided into sharp lobes. The inflorescence is a spikelike cluster of a few pale pink, lavender, or nearly white flowers with somewhat lance-shaped, hairy petals several millimeters long. It rarely produces fertile seed and it is believed to propagate itself mainly via rhizomes.




Island Collections~
ISLAND COLLECTOR INSTITUTION DATE NUMBER SPECIMEN
San Clemente Island F. W. Peirson Jeps April 9, 1923 JEPS-26403 Malacothamnus clementinus Plants
San Clemente Island F. W. Peirson RSA April 9, 1923 RSA-77203 Malacothamnus clementinus Plants
San Clemente Island Nell Murbarger UC May 1936 UC-557734 Malacothamnus clementinus Plants