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CRASSULACEAE STONECROP FAMILY

Steve Boyd, except as noted

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.
± 33 genera, ± 1400 species: ± worldwide, especially dry temperate; many cultivated for ornamental. [Eggli (ed.) 2003 Illus Handbook Succulent Plants 6 (Crassulaceae). Springer] 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. —Scientific Editor: Thomas J. Rosatti.

Key to Crassulaceae

SEDUM STONECROP

Steve Boyd & Melinda F. Denton

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.
± 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. (Latin: to assuage, from healing properties of houseleek, to which Sedum was sometimes applied) Sedum roseum moved to Rhodiola.
Unabridged references: [Denton 1982 Brittonia 34:48–77]

Key to Sedum

S. niveum Davidson DAVIDSON'S STONECROP
NATIVE
Plant 3–9 cm, matted; rosettes dense, 0.6–1.7 cm diam, internodes generally not visible, generally < 1 mm. Leaf: 5–9 mm, 1–3 mm thick, oblong to spoon-shaped, tip rounded to wide-acute. Inflorescence: 1–2 cm, 1–9-flowered. Flower: petals spreading to reflexed, 5–8 mm, lanceolate, acute, white, pink-streaked; anthers red to black. Fruit: fused at base, 5–7 mm, erect. Seed: ± 0.5 mm.
n=16. Rocky ledges, crevices; 2100–3000 m. San Bernardino Mountains, e Peninsular Ranges (Santa Rosa Mtns), Desert Mountains (New York Mtns); Baja California. Sedum pinetorum Brandegee, Congdonia pinetorum (Brandegee) Jeps. are possible synonyms of Sedum niveum. Jun–Aug [Online Interchange] {CNPS list}
Unabridged note: Sedum pinetorum Brandegee and Congdonia pinetorum (Brandegee) Jeps. are treated here, at least for the time being, as synonyms of Sedum niveum Davidson. Clausen (1975: 186) stated, "Many details of the description of Sedum pinetorum T.S. Brandegee suggest a small specimen of S. niveum. These include tuberous roots, basal cohesion of petals, yellow nectaries, and erect follicles. Discrepancies include arrangement of leaves — 'opposite' in Sedum pinetorum and alternate in Sedum niveum; length of petals — '3.5 mm.' in Sedum pinetorum versus 5–10 mm. in Sedum niveum; and color of seeds — 'red' in Sedum pinetorum versus dark brown or red-brown in Sedum niveum. The validity of these differences may be questionable. The type collection of Sedum pinetorum is so fragmentary that accurate interpretation is difficult. Evidence is conflicting. Accurate identification of Sedum pinetorum awaits rediscovery of similar plants. If Sedum niveum someday is found along the eastern slope of the Sierra Nevada and plants represented by the two names are determined to belong to the same sp., then Sedum pinetorum would be the correct name for the sp. because it predates Sedum niveum by five years." In Eggli (2003) a description is given for Sedum pinetorum (pp 307–307), even though it is also said of this taxon, "Status uncertain; probably identical with S. niveum".

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Oct 20 2014
Citation for this treatment: [Author of taxon treatment] 2013. Sedum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=43991, accessed on Oct 20 2014

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Geographic subdivisions indicated for the distribution of Sedum niveum Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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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.
Blue line denotes eFlora flowering time.