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LOASACEAE LOASA FAMILY

Larry Hufford & Barry Prigge, except as noted

Annual to subshrub; hairs needle-like, barbed, occasionally stinging. Leaf: alternate [opposite], generally ± pinnate-lobed; stipules 0. Inflorescence: cyme, raceme. Flower: bisexual, radial; sepals generally 5, generally persistent; petals generally 5, free or fused to each other or filament tube; stamens 5–many, filaments thread-like to flat, occasionally fused at base or in clusters; petal-like staminodes occasionally present; pistil 1, ovary inferior, chamber generally 1, placentas generally 3, parietal, style 1. Fruit: capsule or achene. Seed: 1–many.
18+ genera, 250 species: especially America (Africa, Pacific). [Ernst & Thompson 1963 J Arnold Arbor 44:138–142] —Scientific Editors: Douglas H. Goldman, Bruce G. Baldwin.

Key to Loasaceae

EUCNIDE ROCK-NETTLE
Annual or subshrub; hairs needle-like, stinging, barbed. Leaf: widely ovate to ± round, toothed to ± lobed; base widely tapered to cordate. Inflorescence: cyme, bracted. Flower: petals fused at least at base; stamens epipetalous or fused at base into a short tube; ovary funnel-shaped to hemispheric, placentas 5, stigma lobes 5, generally appressed. Fruit: obovoid to spheric, nodding or reflexed, dehiscent at top by 5 valves. Seed: many, < 1 mm, ± oblong, grooved or ribbed.
14 species: southwestern United States, northern Mexico. (Greek: strongly nettle-like)

Key to Eucnide

E. rupestris (Baill.) H.J. Thomps. & W.R. Ernst ANNUAL ROCK-NETTLE
NATIVE
Plant < 30 cm. Leaf: petiole < 6 cm; blade 1–8 cm, generally round, widely tapered to cordate, toothed to weakly lobed, shiny-green above. Flower: sepals 3.5–7 mm, 2–3 mm wide, tip obtuse; corolla tube narrow-cylindric with ring of hairs at base, lobes erect; stigma below most anthers. Fruit: 7–15 mm, cylindric; pedicel < 2 cm, reflexed.
Crevices, cliffs; 500–600 m. s Sonoran Desert (Painted Gorge, Imperial Co.); Arizona, northern Mexico (including islands). Dec–Apr [Online Interchange] {CNPS list}
Unabridged synonyms: [Sympetaleia rupestris (Baill.) A. Gray ex S. Watson]

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Next taxon: Eucnide urens

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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 22 2014
Citation for this treatment: [Author of taxon treatment] 2013. Eucnide, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=25302, accessed on Oct 22 2014

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click for enlargement Eucnide rupestris
See CalPhotos for additional images
2005 Dieter Wilken

Geographic subdivisions indicated for the distribution of Eucnide rupestris 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.