''Dudleya anthonyi'', known by the common name San Quintín liveforever, is a

succulent plant In botany, succulent plants, also known as succulents, are plants with parts that are thickened, fleshy, and engorged, usually to retain water in arid climates or soil conditions. The word ''succulent'' comes from the Latin word ''sucus'', meani ...

endemic to the

San Quintín volcanic field The San Quintín Volcanic Field is a collection of ten or eleven volcanic cinder cones situated along the Pacific coast of the Baja California peninsula in Mexico. The field formed by repeated eruptions beginning in the Pleistocene and ending ab ...

, located on

Isla San Martín Isla San Martín is an island in the Pacific Ocean west of the Baja California Peninsula. The island is uninhabited and is part of the Ensenada Municipality. Biology Isla San Martín has six species of reptiles: ''Anniella geronimensis'' (Baja ...

and the adjacent mainland bay of Bahia San Quintín, within

Baja California Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ...

Description

''Dudleya anthonyi'' is very similar in appearance to ''

Dudleya pulverulenta ''Dudleya pulverulenta'' is a species of perennial succulent plant known by the common names chalk lettuce, chalk dudleya, and chalk liveforever. It is one of the largest ''Dudleya'', with a silvery, waxy rosette that may greatly contrast with i ...

''. Its stem leaves are narrower, its petals are narrower and united only below the middle, its sepals are narrow above but broadened at the base, and its petals are sharply acute. ''Dudleya anthonyi'' may usually be distinguished from ''D. puverulenta'' by its narrower and more rigid leaves, which taper from the base. The form of the plants varies persistent with location. Plants found on San Martin tend to be larger and with wider leaves than their counterparts on the coast of San Quintin Bay. Further south along the coast, another form exists in Socorro Canyon, with tall, erect stems, giving a resemblance of miniature trees. The plant is unusual among ''Dudleya'' in that after seed is set, the flowers and their pedicels will become almost vertical. Flowering is from early June to July.

Taxonomy

The plant is named in honor of the ornithologist Alfred Anthony, who visited the area in 1897. The species is known to hybridize with ''

Dudleya cultrata ''Dudleya cultrata'' is a species of perennial succulent in the family Crassulaceae commonly known as the knife-leaved liveforever or the maritime succulent liveforever. This species is characterized by oblong, narrow green leaves and flowers wi ...

'' on Isla San Martín. Their range overlaps on both the mainland and San Martín, but the hybrid is only obvious on the island. The chromosome number is n = 17.

Distribution and habitat

''Dudleya anthonyi'' occurs is restricted to the

, the scope of which includes the Island of San Martin and the adjacent coast and peninsulas in the San Quintin Bay. The plant has a tendency to occur, like other ''Dudleya'', on cliffs and canyons.

References

External links

crassulaceae.com - Dudleya anthonyi

Plants of the World Online - Dudleya anthonyi

The genus Dudleya Britton & Rose (Crassulaceae): its systematics and biology.
anthonyi Flora of Baja California Endemic flora of Mexico Flora of the California desert regions Natural history of the Peninsular Ranges Taxa named by Joseph Nelson Rose Flora without expected TNC conservation status {{Crassulaceae-stub