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GERANIACEAE GERANIUM FAMILY

Carlos Aedo, except as noted

Annual, perennial herb, or ± woody, generally glandular-hairy. Leaf: simple to compound, basal and cauline; cauline alternate or opposite, stipules 2, ± on stem. Inflorescence: cyme or pseudo-umbel or 1–2-flowered. Flower: bisexual [unisexual], radial or ± bilateral; sepals 5, free, overlapping in bud; petals generally 5, free, generally with nectar glands at base; stamens generally 5,10[15]; staminodes scale-like or 0; ovary generally 5-lobed, upper part elongating into beak in fruit, chambers 5, placentas axile, style 1, stigmas 5, free, persistent in fruit. Fruit: septicidal [loculicidal], mericarps 5, dry, generally 1-seeded, each persistent on 1 of 5 linear segments of beak that separate from central column by curving or coiling upward.
6 genera, ± 750 species: temperate, ± tropics. Some cultivated for ornamental, perfume oils. [Bakker et al. 2006 Taxon 55:887–896] —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Bakker, F. T., Breman, F., & Merckx, V. 2006. DNA sequence evolution in fast-evolving mitochondrial DNA nad1 exons in Geraniaceae and Plantaginaceae. Taxon 55: 887–896; Price & Palmer 1993 Ann Missouri Bot Gard 80:661–671]

Key to Geraniaceae

PELARGONIUM GARDEN GERANIUM

Piet Vorster

Annual, generally perennial herb, shrub, aromatic or strong-smelling. Stem: generally erect. Leaf: alternate to ± opposite above; blade lobed to dissected, lobes generally crenate or serrate. Inflorescence: umbel, dense to open; flowers 3–many. Flower: ± bilateral [(radial)], nectary 1, deeply embedded into receptacle to form spur fused with pedicel; petals ± equal to strongly unequal, generally striped or marked, upper 2 generally > lower 3, different in shape, position, generally with marks of different and/or more intense color; fertile stamens 1–7, united at base. Fruit: body dehiscent, generally oblong, base acute, 1-seeded; beak segments stiff-hairy adaxially.
± 300 species: southern Africa, St. Helena, Asia Minor, Madagascar, Australia. (Greek: stork, from beaked fruit) [Bakker et al. 2005 in Bakker et al. (eds.) Plant Species-Level Syst:75–100. A.R.G. Gantner] Pelargonium ×domesticum, cultivated but evidently not escaped in California; Pelargonium quercifolium (L.) L'Hér., urban weed.
Unabridged references: [Bakker, F. T., Culham, A., Hettiarachi, P., Touloumenidou, T., & Gibby, M. 2004. Phylogeny of Pelargonium (Geraniaceae) based on DNA sequences from three genomes. Taxon 53: 17–28; Bakker, F. T., Culham, A., Marais, E. M., & Gibby, M. 2005. Nested radiation in Cape Pelargonium. Pp. 75–100, in Bakker, F. T., Chatrou, L. W., Gravendeel, B., & Pelser, P. B. (eds), Plant Species-Level Systematics: New Perspectives on Pattern and Process. A.R.G. Gantner, Ruggel, Liechtenstein. [Regnum Vegetabile vol. 143.]; Van der Walt 1985 Bothalia 15:345–385, 1977 Pelargoniums of Southern Africa vol. 1; Van der Walt & Vorster 1981 Pelargoniums of Southern Africa vol. 2; Van der Walt & Vorster 1988 Pelargoniums of Southern Africa vol. 3]

Key to Pelargonium

P. zonale (L.) L'Hér. HORSESHOE GERANIUM
WAIF
Subshrub. Stem: spreading or erect, generally > 1 m; branches soft-woody. Leaf: blade 5–8 cm wide, as long as wide, round to cordate, often with a dark horseshoe-shaped band adaxially, membranous, 3–5-lobed, lobes irregularly dentate; hairs 0 or sparse. Inflorescence: open; flowers 5–70. Flower: sepals < 10 mm; petals < 20 mm, narrowly obovate, pink-purple.
Disturbed sites; < 300 m. Central Coast, San Francisco Bay Area, South Coast; native to southern Africa. All year [Online Interchange]

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Aug 29 2014
Citation for this treatment: [Author of taxon treatment] 2013. Pelargonium, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=36674, accessed on Aug 29 2014

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Geographic subdivisions indicated for the distribution of Pelargonium zonale 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.