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Vascular Plants of California
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Thysanocarpus laciniatus

Higher Taxonomy
Family: Brassicaceae (Cruciferae)View DescriptionDichotomous Key
Habit: Annual to shrub; sap pungent, watery. Leaf: generally simple, alternate; generally both basal, cauline; stipules 0. Inflorescence: generally raceme, generally not bracted. Flower: bisexual, generally radial; sepals 4, generally free; petals (0)4, forming a cross, generally white or yellow to purple; stamens generally 6 (2 or 4), 4 long, 2 short (3 pairs of unequal length); ovary 1, superior, generally 2-chambered with septum connecting 2 parietal placentas; style 1, stigma entire or 2-lobed. Fruit: capsule, generally 2-valved, "silique" (length >= 3 × width) or "silicle" (length < 3 × width), dehiscent by 2 valves or indehiscent, cylindric or flat parallel or perpendicular to septum, segmented or not. Seed: 1--many, in 1 or 2 rows per chamber, winged or wingless; embryo strongly curved.
Genera In Family: +- 330 genera, 3780 species: worldwide, especially temperate. Note: Highest diversity in Mediterranean area, mountains of southwestern Asia, adjacent central Asia, western North America; some Brassica species are oil or vegetable crops; Arabidopsis thaliana used in experimental molecular biology; many species are ornamentals, weeds. Aurinia saxatilis (L.) Desvaux in cultivation only. Aubrieta occasional waif in central NCoR, Carrichtera annua (L.) DC. in SCo, Iberis sempervirens L., Iberis umbellata L. in PR, Teesdalia coronopifolia (Bergeret) Thell., Teesdalia nudicaulis (L.) W.T. Aiton in southern NCoRO, CCo. Cardaria, Coronopus moved to Lepidium; Caulostramina to Hesperidanthus; Guillenia to Caulanthus; Heterodraba to Athysanus; California taxa of Lesquerella to Physaria; Malcolmia africana to Strigosella.
eFlora Treatment Author: Ihsan A. Al-Shehbaz, except as noted
Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.
Genus: ThysanocarpusView DescriptionDichotomous Key

Habit: Annual; hairs 0 or simple. Leaf: simple, sessile, entire, dentate, or pinnately lobed; middle, distal cauline clasping, lobed or not. Inflorescence: open (dense). Flower: sepals ascending, base not sac-like; petals +- >= sepals, white or +- purple-tinged, not clawed; fertile anthers yellow or generally purple (flowers occasionally with whitish or yellowish infertile anthers). Fruit: indehiscent, pendent, elliptic to ovate or round, unsegmented, over-seed (i.e., excluding wing) generally plano-convex; septum 0; wing generally not incurved toward over-seed flat side, entire, wavy-margined, crenate, perforated, or divided into spoon-shaped lobes, rays (radiating veins) present or not, generally +- indistinct; stigma entire. Seed: 1, elliptic to round, wingless.
Species In Genus: 6 species: western North America. Etymology: (Greek: fringe fruit)
eFlora Treatment Author: Ihsan A. Al-Shehbaz & Thomas J. Rosatti
Reference: Revised taxonomy based on Alexander et al. (2010 Syst Bot 35:559--577).
Thysanocarpus laciniatus Nutt.
Habit: Plant generally not branched from base, generally glaucous, glabrous (with sparse, rough, stiff hairs near base). Stem: 1--6 dm. Leaf: generally greenish or basal occasionally purplish; basal 2--6(9) cm, oblanceolate to elliptic, subentire, wavy-dentate, or pinnately lobed; cauline linear to narrowly elliptic, bases wedge-shaped, +- lobed or not, +- not clasping. Inflorescence: raceme open. Flower: fertile anthers purple, rarely some flowers with whitish or yellowish infertile anthers. Fruit: 3--5 mm wide, obovate to +- round, greenish, hairs 0.05--0.4 mm, club-shaped, or generally 0; wing flat or +- incurved toward over-seed convex side, entire to deeply crenate, rays 0 or 0.2--0.5 mm wide, +- indistinct; proximal pedicels recurved in a continuous arc, 2.5--6(8) mm.
Ecology: Oak woodland, rocky ridges, slopes, chaparral, washes; Elevation: 100--1800 m. Bioregional Distribution: NCoRI, s SNF, Teh, ScV (Sutter Buttes), SnFrB, SCoR, SW, SNE, D; Distribution Outside California: western Arizona, Baja California. Flowering Time: Mar--May Note: Highly variable, probably hybridizes with Thysanocarpus curvipes, resembles the latter when cauline leaf bases lobed.
Synonyms: Thysanocarpus laciniatus var. laciniatus
Jepson eFlora Author: Ihsan A. Al-Shehbaz & Thomas J. Rosatti
Reference: Revised taxonomy based on Alexander et al. (2010 Syst Bot 35:559--577).
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

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Citation for this treatment: Ihsan A. Al-Shehbaz & Thomas J. Rosatti 2013, Thysanocarpus laciniatus, in Jepson Flora Project (eds.) Jepson eFlora, Revision 1,, accessed on May 11, 2021.

Citation for the whole project: Jepson Flora Project (eds.) 2021, Jepson eFlora,, accessed on May 11, 2021.

Thysanocarpus laciniatus
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© 2009 Gary A. Monroe
Thysanocarpus laciniatus
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© 2010 Thomas Stoughton
Thysanocarpus laciniatus
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© 2008 Keir Morse
Thysanocarpus laciniatus
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© 2010 Thomas Stoughton
Thysanocarpus laciniatus
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© 2018 Barry Breckling
Thysanocarpus laciniatus
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© 2010 Thomas Stoughton

More photos of Thysanocarpus laciniatus in CalPhotos

Geographic subdivisions for Thysanocarpus laciniatus:
NCoRI, s SNF, Teh, ScV (Sutter Buttes), SnFrB, SCoR, SW, SNE, D
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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.
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).