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Daniel Potter & Barbara Ertter, family description, key to genera; treatment of genera by Daniel Potter, except as noted

Annual to tree, glandular or not. Leaf: simple to palmately or pinnately compound, generally alternate; stipules free to fused (0), persistent to deciduous. Inflorescence: cyme, raceme, panicle, cluster, or flowers 1; bractlets on pedicel ("pedicel bractlets") generally 0–3(many), subtended by bract or generally not. Flower: generally bisexual, radial; hypanthium free or fused to ovary, saucer- to funnel-shaped, subtending bractlets ("hypanthium bractlets") 0–5, alternate sepals; sepals generally 5; petals generally 5, free; stamens (0,1)5–many, anther pollen sacs generally 2; pistils (0)1–many, simple or compound, ovary superior to inferior, styles 1–5. Fruit: 1–many per flower, achene (fleshy-coated or not), follicle, drupe, or pome with generally papery core, occasionally drupe-like with 1–5 stones. Seed: generally 1–5 (per fruit, not per flower).
110 genera, ± 3000 species: worldwide, especially temperate; many cultivated for ornamental, fruit, especially Cotoneaster, Fragaria, Malus, Prunus, Pyracantha, Rosa, Rubus. [Potter et al. 2007 Plant Syst Evol 266:5–43] Number of teeth is per leaf or leaflet, not per side of leaf or leaflet, except in Drymocallis. —Scientific Editors: Daniel Potter, Thomas J. Rosatti.
Unabridged references: [Robertson 1974 J Arnold Arbor 55:303–332, 344–401, 611–662]

Key to Rosaceae


Bruce D. Parfitt & Margriet Wetherwax

1 sp. (Abbot V. Fallugi, Italian botanist, ± 1627–1707)

F. paradoxa (D. Don) Torr.
Shrub < 2 m, ± erect. Stem: much-branched; bark gray-white-tomentose, peeling. Leaf: alternate to clustered, 7–15 mm, ovate to wedge-shaped, deeply 3–7-pinnately lobed, lobes linear, obtuse, densely hairy adaxially, rusty-scaly abaxially, margins rolled under; stipules lanceolate, deciduous. Inflorescence: flowers 1–3, terminal; pedicel bractlets 0. Flower: hypanthium hemispheric, silky-hairy, bractlets 5, linear; sepals 5–8 mm, ovate, acute to long-acuminate, tomentose; petals 10–25 mm, ± round, white; stamens many; pistils many, ovary superior, chamber 1, style 1, persistent. Fruit: achene, 3–5 mm, silky-hairy, style 30–50 mm, plumose, ± purple.
2n=28. Dry, ± rocky slopes in pinyon/juniper woodland; 1000–2200 m. e Desert Mountains; to Colorado, western Oklahoma, western Texas, northern Mexico. May–Jun [Online Interchange]
Unabridged note: Expanded author citation: Fallugia paradoxa (D. Don) Endl. ex Torr.

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora,, accessed on Nov 28 2015
Citation for this treatment: [Author of taxon treatment] 2013. Fallugia, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on Nov 28 2015

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click for enlargement Fallugia paradoxa
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2005 Robert Sivinski

Geographic subdivisions indicated for the distribution of Fallugia paradoxa 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.
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.