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Boechera breweri subsp. shastaensis
SHASTA ROCKCRESS

Higher Taxonomy
Family: Brassicaceae (Cruciferae)View DescriptionDichotomous Key

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.
Genus: BoecheraView DescriptionDichotomous Key

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
Species: Boechera breweriView Description 

Habit: Caudex woody. Stem: generally 1 per caudex branch, from center of basal rosette at ground surface or elevated on woody base; 0.6--4.5 dm, proximally with simple and long-stalked, 2-rayed hairs (simple only) 0.4--1 mm. Leaf: basal 3--11 mm wide, entire (dentate), hairs long-stalked, 2--4-rayed, 0.4--0.8 mm; cauline 5--28, distal hairy, basal lobes generally < 3 mm. Inflorescence: 7--30-flowered, not 1-sided in fruit; fruit pedicel ascending to spreading-ascending, straight, 3--25 mm, glabrous or hairs spreading, simple and 2-rayed. Flower: sepals hairy; petals 7--12 mm, 2--4 mm wide, purple (lavender); pollen ellipsoid. Fruit: ascending to spreading-ascending, not appressed, 3.5--10 cm, 1.5--2.2 mm wide, glabrous (sparsely hairy); style < 0.3 mm; ovules 48--96. Seed: in 1 row, 1.2--1.7 mm; wing 0.1--0.2 mm wide.


Boechera breweri subsp. shastaensis Windham & Al-Shehbaz
NATIVE
Stem: 1.8--4.5 dm. Inflorescence: fruit pedicel generally > 9 mm, glabrous or hairs few, scattered. Chromosomes: 2n=14.
Ecology: Rocky areas in woodland; Elevation: 300--1200 m. Bioregional Distribution: e KR, NCoRI, CaRF, n SNF, ScV (Sutter Buttes); Distribution Outside California: southwestern Oregon. Flowering Time: Mar--Jun
Synonyms: Arabis breweri S. Watson var. austiniae (Greene) Rollins
eFlora Treatment Author: Michael D. Windham & Ihsan A. Al-Shehbaz
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Citation for this treatment: Michael D. Windham & Ihsan A. Al-Shehbaz 2016. Boechera breweri subsp. shastaensis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=90400, accessed on May 06, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 06, 2016.


Boechera breweri subsp. shastaensis
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© 2008 George W. Hartwell
Boechera breweri subsp. shastaensis
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© 1981 Robert E. Preston, Ph.D.
Boechera breweri subsp. shastaensis
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© 2013 Julie Kierstead Nelson
Boechera breweri subsp. shastaensis
click for enlargement
© 2008 George W. Hartwell
Boechera breweri subsp. shastaensis
click for enlargement
© 2009 George W. Hartwell
Boechera breweri subsp. shastaensis
click for enlargement
© 2009 George W. Hartwell

More photos of Boechera breweri subsp. shastaensis in CalPhotos


Geographic subdivisions for Boechera breweri subsp. shastaensis:
e KR, NCoRI, CaRF, n SNF, ScV (Sutter Buttes);
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.