Dudleya rigidiflora

Dudleya rigidiflora
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Order:	Saxifragales
Family:	Crassulaceae
Genus:	Dudleya
Species:	D. rigidiflora
Binomial name
	Dudleya rigidiflora; Britton & Rose 1903
Synonyms[1][2]
	Cotyledon rigidiflora (Rose) Fedde ; Echeveria rigidiflora (Rose) A.Berger ;

Dudleya rigidiflora is a very rare species of succulent perennial plant known by the common name Playa Maria liveforever, endemic to the coast of southwestern Baja California.[3]

Description

Morphology

It is a solitary or few-branched plant, but it may form clumps up to 1 meter in diameter. The caudex is 2 decimetres (20 cm) long, and 1.5 to 4 cm wide. Each individual rosette is 0.5 dm (5.0 cm) to 1.5 dm (15 cm) wide, with 20 to 60 erect to ascending leaves. The leaves are light green and glaucous.[4]

The floral stems are 15 to 40 cm tall, green or reddish, 4 to 9 mm in diameter, with 15 to 30 bracts.[4] The inflorescence is of numerous long, slender, and secund racemes. The pedicels are ascending, 4 to 5 mm long. The calyx is deeply 5-cleft, with equal lobes, fleshy, and 6 to 7 mm long, acuminate, and somewhat glaucous. The corolla is 12 mm long, with a tube 5 mm long, the lobes of the petals slender, acute and erect.[5] The color of the corolla is variable, ranging from white with no yellow to red or reddish.[4] There are 10 stamens, much shorter than the corolla, all attached towards the top of the corolla-tube. 5 carpels, slender and erect, free to the base. Type specimen collected in July to October of 1896 by an A. W. Anthony.[5]

Specimens collected by Reid Moran show that the chromosome number is n=34.[4]

Distribution

Occurs on the coast of southwestern Baja California, around the Playa Maria Bay (Bahía María), near San José de las Palomas.[3] It occurs on barren hillsides and arroyos near the sea.[4]

References

"Dudleya rigidiflora". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 7 October 2021.
Just's Botanischer Jahresbericht 31, pt. 1: 826, 1904
Rebman, J. P.; Gibson, J.; Rich, K. (2016). "Annotated checklist of the vascular plants of Baja California, Mexico" (PDF). San Diego Society of Natural History. 45: 131.
Moran, Reid (April 1960). "Dudleya rigidiflora Rose Topotype (8194)". Reid Moran's Field Book: 6092 – via San Diego Natural History Museum.
Rose, Joseph Nelson (1903). "Dudleya rigidiflora". Bulletin of the New York Botanical Garden. 3 (9): 18.

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[1] "Dudleya rigidiflora". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 7 October 2021.

[2] Just's Botanischer Jahresbericht 31, pt. 1: 826, 1904

[:2-3] Rebman, J. P.; Gibson, J.; Rich, K. (2016). "Annotated checklist of the vascular plants of Baja California, Mexico" (PDF). San Diego Society of Natural History. 45: 131.

[:0-4] Moran, Reid (April 1960). "Dudleya rigidiflora Rose Topotype (8194)". Reid Moran's Field Book: 6092 – via San Diego Natural History Museum.

[:1-5] Rose, Joseph Nelson (1903). "Dudleya rigidiflora". Bulletin of the New York Botanical Garden. 3 (9): 18.