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Vascular Plants of California
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Tragia ramosa

Higher Taxonomy
Family: EuphorbiaceaeView DescriptionDichotomous Key
Habit: Annual to shrub, tree [vine, cactus-like succulent]; monoecious or dioecious; sap clear or milky. Stem: generally branched [fleshy or spiny]. Leaf: generally simple, alternate to whorled, generally stipuled, sessile or petioled; blade entire, toothed, or lobed. Inflorescence: flowers solitary or in terminal or axillary cymes, racemes, spikes, or panicles, or (in Euphorbia) 1° inflorescence a compact, flower-like cyathium with much-reduced flowers enclosed within an involucre of fused bracts, cyathia terminal or axillary, 1 or in cyme-like arrays. Flower: unisexual, +- radial; sepals 0 or 2--6, free or fused; petals generally 0(5); stamens 1--many, free or filaments fused; ovary superior, chambers (1)3(4), styles free or fused, undivided, forked, or variously lobed. Fruit: generally capsule that splits into mericarps that then dehisce, releasing seeds. Seed: 1 per chamber; knob-like appendage sometimes present at attachment scar.
Genera In Family: 217 genera, 6000+ species: +- worldwide especially tropics; some cultivated (Aleurites, tung oil; Euphorbia species; Hevea, rubber; Ricinus). Toxicity: Many species +- highly TOXIC, due primarily to latex, especially if eaten or in contact with skin, eyes. Note: Eremocarpus moved to Croton, Tetracoccus moved to Picrodendraceae for TJM2; Chamaesyce moved to Euphorbia here (key to genera revised by Thomas J. Rosatti).
eFlora Treatment Author: Mark H. Mayfield & Grady L. Webster, except as noted
Scientific Editor: Bruce G. Baldwin.
Genus: TragiaView Description 

Common Name: NOSEBURN
Habit: Perennial herb < 0.5 m; hairs stinging, nettle-like; monoecious. Stem: spreading to erect, branched, sometimes twining. Leaf: cauline, alternate; stipules persistent. Inflorescence: raceme, terminal or opposite leaf; staminate flowers distal to pistillate flowers. Staminate Flower: sepals [3]4--5; stamens 3--6[50]; nectary 0. Pistillate Flower: sepals 5[4--8]; ovary 3-chambered, styles simple, +- fused at base. Fruit: +- spheric. Seed: smooth or +- rough; scar not appendaged.
Etymology: (Tragus, name for Hieronymus Bock, German herbalist, 1498--1554)
eFlora Treatment Author: Mark H. Mayfield & Grady L. Webster
Reference: Miller & Webster 1967 Rhodora 69:241--305
Tragia ramosa Torr.
Habit: Plant rough-hairy. Stem: 1--3 dm. Leaf: stipules 1--4.5 mm, lanceolate to ovate; petiole 2--20 mm; blade 1--2 cm, lanceolate to ovate, base truncate to +- lobed, margin coarsely, sharply toothed. Inflorescence: 0.5--1 cm, +- spreading; pedicels 1--2 mm; staminate flowers 2--4; pistillate flower 1. Staminate Flower: sepals 4--5, +- 1 mm, recurved; stamens 3--6, filaments +- flattened. Pistillate Flower: sepals 5, 1.5--2 mm; ovary < 2 mm diam, puberulent to finely bristly, styles fused in proximal 1/3. Fruit: 3--4 mm, 6--8 mm wide, depressed-spheric, sparsely and finely bristly. Seed: 2.5--3.5 mm, +- spheric.
Ecology: Dry, rocky slopes, scrub, pinyon/juniper woodland; Elevation: 900--1900 m. Bioregional Distribution: DMtns; Distribution Outside California: to central United States, Texas, Mexico. Flowering Time: Apr--May
Synonyms: Tragia stylaris Müll. Arg.
Jepson eFlora Author: Mark H. Mayfield & Grady L. Webster
Reference: Miller & Webster 1967 Rhodora 69:241--305
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)
Listed on CNPS Rare Plant Inventory

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Botanical illustration including Tragia ramosa

botanical illustration including Tragia ramosa

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Citation for this treatment: Mark H. Mayfield & Grady L. Webster 2012, Tragia ramosa, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on June 15, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora,, accessed on June 15, 2024.

Tragia ramosa
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©2015 Keir Morse
Tragia ramosa
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©2012 Keir Morse
Tragia ramosa
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©2009 James M. Andre
Tragia ramosa
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©2012 Keir Morse
Tragia ramosa
click for enlargement
©2012 Keir Morse

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Geographic subdivisions for Tragia ramosa:
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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).


Data provided by the participants of the  Consortium of California Herbaria.
View all CCH records
All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).