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PORTULACACEAE PURSLANE FAMILY

Gilberto Ocampo

Annual to perennial herb, generally fleshy. Stem: [1]several to many, spreading [to erect], generally glabrous. Leaf: simple, alternate or opposite, linear, obovate, spoon-shaped, [elliptic, ± round], flat or cylindric, hairs in axils, inconspicuous or not [0], upper 2–5 forming involucre. Inflorescence: flowers 1 or clustered at stem tips. Flower: bisexual, radial; sepals 2, fused at base, lower part fused to ovary and generally persistent in fruit; petals [4]5[7], fused at base, forming ring, yellow [magenta, rose, orange, white]; stamens 4–20[> 20], epipetalous or not, anthers yellow; ovary 1/2-inferior, chamber 1, ovules several to many, placenta free-central; style branches [2]3–6[12]. Fruit: capsule, circumscissile. Seed: many, reniform, ± tubercled, black, gray, [brown, ± blue].
1 genus, ± 100 species: ± worldwide, especially tropics, subtropics some cultivated (Portulaca grandiflora Hook.; Portulaca umbraticola Kunth). [Nyffeler & Eggli 2010 Taxon 59:227–240] All other California genera previously in this family now in Montiaceae. —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Applequist et al. 2006 Syst Bot 31:310–319]

PORTULACA
(Probably Latin: small gate or door, from capsule lid) [Matthews 2004 FNANM 4:496–501]
Unabridged references: [Danin et al. 1978 Israel J Bot 27:177–211; Legrand 1962 Anales Mus Hist Nat (Montevideo) 2a ser 7(3):1–147]

Key to Portulaca

P. oleracea L. PURSLANE
NATURALIZED
Annual, ± perennial herb. Stem: spreading, 3–40 cm. Leaf: 3–30 mm. Inflorescence: flowers 1–8. Flower: sepals 2.5–5 mm, green or ± red; petals 3–5 mm, yellow; stamens 5–12[20]; style branches 3–6. Fruit: 2–4.5 mm wide. Seed: 0.6–1 mm wide, dark brown to black.
2n=18,36,54. Disturbed soil; < 2100 m. California; probably native to eastern hemisphere, widely naturalized elsewhere. Apr–Oct [Online Interchange]
Unabridged note: Evidence indicates that Portulaca oleracea is not monophyletic. Some specimens found in Mojave Desert seem to belong to either Portulaca oleracea subsp. impolita Danin & H.G. Baker or to a lineage more close related to Portulaca johnstonii Henrickson; study needed.

Previous taxon: Portulaca halimoides
Next taxon: Primulaceae

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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 23 2014
Citation for this treatment: [Author of taxon treatment] 2013. Portulaca, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=39530, accessed on Oct 23 2014

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Geographic subdivisions indicated for the distribution of Portulaca oleracea 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.