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Sedum obtusatum subsp. retusum

Higher Taxonomy
Family: CrassulaceaeView DescriptionDichotomous Key

Habit: Annual to shrub [(+- tree-like or climbing)], fleshy. Leaf: generally simple, alternate or opposite, in dense to open, basal (or terminal) rosettes or basal and cauline, not in rosettes, reduced distally or not, margin often +- red. Inflorescence: generally cyme, generally bracted. Flower: generally bisexual; sepals generally 3--5, generally +- free; petals generally 3--5, +- free or fused; stamens >> to = sepals, epipetalous or not; pistils generally 3--5, simple, fused at base or not, ovary 1-chambered, placenta 1, parietal, ovules 1--many, style 1. Fruit: follicles, generally 3--5. Seed: 1--many, small.
Genera In Family: +- 33 genera, +- 1400 species: +- worldwide, especially dry temperate; many cultivated for ornamental. Note: Water-stressed plants often +- brown or +- red. Consistent terminology regarding leaves, bracts difficult; in taxa with rosettes (e.g., Aeonium, Dudleya, some Sedum), structures in rosettes are leaves, those on peduncles are bracts, and those subtending flowers are flower bracts; in taxa where inflorescence is terminal, rosette leaves may "become" bracts as stem rapidly elongates to form inflorescence. Seed numbers given per follicle.
eFlora Treatment Author: Steve Boyd, except as noted
Scientific Editor: Thomas J. Rosatti, Bruce G. Baldwin.
Genus: SedumView DescriptionDichotomous Key

Common Name: STONECROP
Habit: Perennial herb (annual, biennial, subshrub), generally from rhizomes or stout, scaly caudex, generally glabrous; rosettes 0 or open to dense. Leaf: sessile, generally alternate, generally obovate to spoon-shaped. Inflorescence: terminal, generally raceme- to panicle-like. Flower: sepals, petals generally 5, free to fused at base, sepals < petals, obtuse to long-tapered; petals erect to spreading; stamens 8 or 10, in 2 whorls, epipetalous or not; pistils 4--5, free or fused below. Fruit: free or fused at base, erect or spreading. Seed: many, elliptic, often winged at both ends.
Species In Genus: +- 450 species: temps, tropical mountains, North America, Mexico, Central America, Europe, Asia, northern and eastern Africa, Atlantic islands, Indian Ocean islands; cultivated as ornamental, green roofs. Etymology: (Latin: to assuage, from healing properties of houseleek, to which Sedum was sometimes applied) Note: Sedum roseum moved to Rhodiola.
eFlora Treatment Author: Steve Boyd & Melinda F. Denton
Reference: Zika 2014 Phytotaxa 159: 111--121.
Unabridged Reference: Denton 1982 Brittonia 34:48--77.
Species: Sedum obtusatumView Description 

Habit: Plant 3--22 cm, glaucous; rosettes generally dense, 1--6 cm diam, internodes generally not visible, generally < 3 mm. Leaf: 6--33 mm, 1--4 mm thick, obovate to oblanceolate or spoon-shaped, widest 2--8 mm below tip, tip rounded or obtuse to +- notched. Inflorescence: 2--12 cm, often flat-topped; bracts 4--19 mm, obtuse or truncate. Flower: sepals acute to long-tapered; petals 3.5--11 mm, obovate, rounded to obtuse, generally mucronate; anthers +- yellow to dark red-brown. Fruit: free, 5--10 mm, erect.

Sedum obtusatum subsp. retusum (Rose) R.T. Clausen
Habit: Rosette open, internodes visible, some 3--5 mm. Inflorescence: 2--8 cm, 13--40(72)-flowered; bracts (5)8--17 mm. Flower: sepals 3 mm, obtuse; petals 6--9 mm, +- pale yellow or cream. Chromosomes: n=30.
Ecology: Outcrops; Elevation: 400--2300 m. Bioregional Distribution: NCoRH, KR; Distribution Outside California: southwestern Oregon. Flowering Time: Jun--Aug
Synonyms: Sedum laxum (Britton) A. Berger subsp. retusum (Rose) R.T. Clausen; Sedum sanhedrinum A. Berger; Sedum obtusatum var. retusum (Rose) H. Ohba;
eFlora Treatment Author: Steve Boyd & Melinda F. Denton
Reference: Zika 2014 Phytotaxa 159: 111--121.
Unabridged Reference: Denton 1982 Brittonia 34:48--77.
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botanical illustration including Sedum obtusatum subsp. retusum


Citation for this treatment: Steve Boyd & Melinda F. Denton 2017, Sedum obtusatum subsp. retusum, in Jepson Flora Project (eds.) Jepson eFlora, Revision 5,, accessed on October 15, 2018.

Citation for the whole project: Jepson Flora Project (eds.) 2018, Jepson eFlora,, accessed on October 15, 2018.

Geographic subdivisions for Sedum obtusatum subsp. retusum:
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.