Common Name: MUSTARD FAMILY 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.
Common Name: ROCKCRESS Habit: Perennial herb (biennial); caudex simple or branched, persistent leaf bases generally absent; rosetted or not; rosette at ground surface or elevated on woody base; hairs simple or 2--14-rayed, stalked or sessile. Stem: simple or branched, leafy. Leaf: basal petioled, simple, generally entire or dentate, generally hairy; cauline sessile, base generally lobed, entire or dentate. Inflorescence: generally elongated. Flower: sepals bases generally not sac-like; petals generally white, lavender, or purple, claw present or 0; pollen ellipsoid in sexual pls, spheric in plants with asexual seeds. Fruit: silique, dehiscent, generally linear, edges generally parallel, unsegmented, flat parallel to septum; stigma entire or 2-lobed. Seed: in 1 or 2 rows, winged or not. Species In Genus: 110+ species: temperate North America, Russian Far East. Etymology: (T.W. Boecher, Danish cytogeneticist, 1909--1983) Note: Some species with both fertile & sterile stems. Previously included in Arabis, but the 2 genera in different tribes. Boechera horizontalis (Greene) Windham & Al-Shehbaz [Arabis suffrutescens S. Watson var. horizontalis (Greene) Rollins] not in California. Unabridged Note: Hybrids with spheric pollen and morphological intermediacy generally more common than sexual diploids (with ellipsoid pollen). eFlora Treatment Author: Michael D. Windham & Ihsan A. Al-Shehbaz Reference: Windham & Al-Shehbaz 2006--2007 Harvard Pap Bot 11:61--88, 11:257--274, 12:235--257 Unabridged Reference: Al-Shehbaz 2003 Novon 13:381--391
Boechera rigidissima (Rollins) Al-Shehbaz
NATIVE Habit: Caudex woody. Stem: generally 1 per caudex branch, from center of basal rosette at +- ground surface or on +- elevated woody base; 2--6 dm, proximally with +- sessile, 2--3-rayed (some simple) hairs 0.25--0.4 mm. Leaf: basal 2--6 mm wide, entire; hairs +- sessile, 2--5-rayed, 0.1--0.4 mm; cauline 5--10, distal glabrous, basal lobes 0.5--2 mm. Inflorescence: 5--16-flowered, not 1-sided in fruit; fruit pedicel spreading-ascending, straight, 4--10 mm, glabrous. Flower: sepals glabrous; petals 6--8 mm, 1.5--2 mm wide, purple; pollen spheric. Fruit: spreading-ascending, not appressed, 4--7.6 cm, 2.5--3.5 mm wide, glabrous, edges +- wavy; style 0.2--0.8 mm; ovules 24--54. Seed: in 1 row, 2.5--3.2 mm; wing 0.3--1 mm wide. Ecology: Rocky areas in open conifer forest; Elevation: 1800--2100 m. Bioregional Distribution: KR; Distribution Outside California: Nevada. Flowering Time: Jul--Aug Synonyms: Arabis rigidissima Rollins; Arabis rigidissima var. demota Rollins; Arabis rigidissima var. rigidissima Jepson eFlora Author: Michael D. Windham & Ihsan A. Al-Shehbaz Reference: Windham & Al-Shehbaz 2006--2007 Harvard Pap Bot 11:61--88, 11:257--274, 12:235--257 Unabridged Reference: Al-Shehbaz 2003 Novon 13:381--391 Jepson Online Interchange Listed on CNPS Rare Plant Inventory Previous taxon: Boechera retrofracta Next taxon: Boechera rollei
Citation for this treatment: Michael D. Windham & Ihsan A. Al-Shehbaz 2012, Boechera rigidissima, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=85457, accessed on May 24, 2019.
Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on May 24, 2019.
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(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
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MAP LEGEND 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.
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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.
