Sedum citrinum Zika (2014: 112)

Zika, Peter F., Wilson, Barbara L., Brainerd, Richard E., Otting, Nick, Darington, Steven, Knaus, Brian J. & Nelson, Julie Kierstead, 2018, A review of Sedum section Gormania (Crassulaceae) in western North America, Phytotaxa 368 (1), pp. 448-450 : 448-450

publication ID

https://doi.org/ 10.11646/phytotaxa.368.1.1

persistent identifier

https://treatment.plazi.org/id/03888A7D-5306-1F01-FF2D-DDEAFE22F985

treatment provided by

Felipe

scientific name

Sedum citrinum Zika (2014: 112)
status

 

2. Sedum citrinum Zika (2014: 112) View in CoL . Figs. 2A–B View FIGURE 2 , 5A View FIGURE 5 , 8B View FIGURE 8 , 9A View FIGURE 9 , 11A View FIGURE 11 , 23 View FIGURE 23 , 24A View FIGURE 24 .

Type: — UNITED STATES. California: Del Norte Co., ridge N of South Red Mountain , 1050 m, 9 June 2013, P. F . Zika 26185 (holotype, WTU; isotypes, BH, CAS, GH, MO, OSC, RSA, UC, US) .

Additional specimens examined:— UNITED STATES. CALIFORNIA. Del Norte County: near Red Mountain lookout, 1220 m, 26 June 1979, Overton & Butler 6664 ( HSC); N of South Red Mountain , 1050 m, 24 June 2012, Zika 25930 ( HSC, JEPS, SBBG, UCR); same site, 9 June 2014, Zika 26611 & Brainerd ( OSC, WTU); NNW of South Red

Mountain , 1210 m, 24 June 2012, Zika 25931 ( DAV, MO, NY, US); same site, 9 June 2013, Zika 26193 ( BH, CAS, WTU) ; NW of South Red Mountain, 1235 m, 9 June 2013, Zika 26201 ( BH, CAS, RSA, WTU); N of Red Mountain, 1190 m, 10 June 2014, Zika 26619 & Brainerd ( WTU) ; Turwar Creek drainage, NNW of Red Mountain Lookout, 1235 m, 10 June 2014, Zika 26615 & Brainerd ( HSC, RSA, US); same site, 940 m, 10 June 2014, Zika 26620 & Brainerd ( OSC, WTU) .

Distribution and ecology:— Sedum citrinum was endemic to gently sloping ultramafic outcrops and meadows at elevations of 940–1275 m in southern Del Norte County, California, where it was recorded from a few populations within an area of fifteen square km near South Red Mountain ( Fig. 22 View FIGURE 22 ), in the western Klamath Ranges ecoregion (Jepson eFlora 2017). Its ecology was summarized in Zika (2014).

Notes:— Sedum citrinum ( Fig. 23 View FIGURE 23 ) had thick obovate rosette leaves and thick oblong to elliptic or obovate stem leaves ( Fig. 5A View FIGURE 5 ). The sepals were relatively short ( Fig. 9A View FIGURE 9 ). The petals were deep yellow, narrow, and strongly spreading, often to 90° from the flower axis ( Figs. 8B View FIGURE 8 , 11A View FIGURE 11 ). Fresh anthers were yellow, aging to yellow, white, brown, or orange. The inflorescences were flat-topped or rounded, with elongate lower branches, not columnar or cylindrical as in the closely related species S. kiersteadiae and S. rubiginosum ( Fig. 24 View FIGURE 24 ). The three taxa were allopatric.

Sedum citrinum was similar to the recently described S. kiersteadiae , a more widespread species of the Cascade Range Highlands and Klamath Ranges ecoregions (Jepson eFlora 2017), from Siskiyou County, south to Trinity and Shasta counties ( Fig. 25 View FIGURE 25 , Wilson et al. 2014). Both had narrow, widely spreading, yellow petals and vegetative shoots with well-spaced leaves in open rosettes. Sedum citrinum differed from S. kiersteadiae in inflorescence shape and also in flower color, which was paler in S. kiersteadiae . Sedum citrinum was also similar to S. rubiginosum of Tehama County, California. The latter was restricted to the extreme southern tip of the Klamath Ranges ecoregion, 150 km southeast of S. citrinum ( Fig. 25 View FIGURE 25 ), and had dense rosettes with larger, columnar inflorescences with more numerous and more densely crowded flowers.

N

Nanjing University

P

Museum National d' Histoire Naturelle, Paris (MNHN) - Vascular Plants

F

Field Museum of Natural History, Botany Department

WTU

University of Washington

BH

L. H. Bailey Hortorium, Cornell University

CAS

California Academy of Sciences

GH

Harvard University - Gray Herbarium

MO

Missouri Botanical Garden

OSC

Oregon State University

UC

Upjohn Culture Collection

HSC

Humboldt State University Herbarium

JEPS

University of California

SBBG

Santa Barbara Botanic Garden

UCR

University of California

DAV

UC Davis Center for Plant Diversity

NY

William and Lynda Steere Herbarium of the New York Botanical Garden

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