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John W. Thieret & Elizabeth McClintock, final revision by Thomas J. Rosatti & Bruce G. Baldwin, except as noted

Annual to shrub, aromatic, of sunny areas, often sandy or chalky substrates; hairs nonglandular, in stellate clumps or not, peltate or not, and/or glandular. Leaf: simple, alternate or opposite [whorled], often ± reduced, entire or not, petioled or not, stipuled or not. Inflorescence: raceme- or panicle-like cymes or flowers 1. Flower: generally bisexual, ± radial; sepals 3 or 5 (outer 2 often narrower), free or fused at very base, often persistent in fruit, 3 twisted in direction opposite that of petals; petals [0(3)]4–5, generally ephemeral; stamens (3–10) many, free, often sensitive to touch, ± persistent in fruit or not; ovary superior, chambers 1 (or ± 3–12 from intruded parietal placentas), style 0–1, stigma 1(3), lobes 0 or 3–12. Fruit: loculicidal capsule, valves 3–12. Seed: [1–]3–many.
8 genera, ± 175 species: temperate, especially southeastern United States, Mediterranean; some cultivated (Cistus; Crocanthemum; Tuberaria). [Arrington 2004 Ph.D. Dissertation Duke Univ] Flowers open in sunshine for < 1 day. Taxa of Helianthemum in TJM2 treated here in Crocanthemum. —Scientific Editors: Thomas J. Rosatti, Bruce G. Baldwin.
Unabridged references: [Strother FNANM, in press]

Key to Cistaceae

Annual [perennial herb]; hairs nonglandular, spreading, long, white, red below or not, or some hairs short, red. Stem: erect. Leaf: basal in rosette, often withering early; proximal cauline generally opposite, distal 0–few, alternate; petioled or not; stipuled or not. Inflorescence: raceme-like. Flower: sepals 5, persistent, outer 2 generally narrower; petals 5, yellow; stamens 10–many; style 0, stigma large, hemispheric. Fruit: valves 3.
8–12 species: Europe, northern Africa. (Latin: from tuber-like swellings on roots) [Sales & Hedge 1995 Taxon 44:437–438]

T. guttata (L.) Fourr.
Stem: 5–40 cm. Leaf: 1–6 cm, ± linear, wider below; margin ± rolled under or not. Flower: pedicel 7–15 mm, slender; petals 7–10 mm, generally with red to purple near base.
2n=36. Uncommon. Disturbed places; 80–150 m. n&c Sierra Nevada Foothills, e edge Sacramento Valley; native to Europe, northern Africa. [Helianthemum guttatum (L.) Mill.] Cleistogamous flowers, possibly without petals, sometimes form, set fruit. Apr–May [Online Interchange]
Unabridged note: According to Ellen Dean (Curator, UC Davis Center for Plant Diversity), specimen documenting occurrence in Sacramento Valley is correctly identified, although collected from a habitat more foothill than valley.

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora,, accessed on Nov 25 2015
Citation for this treatment: [Author of taxon treatment] 2013. Tuberaria, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on Nov 25 2015

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click for enlargement Tuberaria guttata
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2000 George W. Hartwell

Geographic subdivisions indicated for the distribution of Tuberaria guttata 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.