Jepson eFlora: Taxon page
Key to families | Table of families and genera
Previous taxon Index to accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Next taxon
Boechera pygmaea
TULARE COUNTY 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

Boechera pygmaea (Rollins) Al-Shehbaz
NATIVE
Habit: Caudex woody; generally with crowded, persistent leaf bases. Stem: generally 2--5 per caudex branch, from margin of basal rosettes, at +- ground surface; 0.2--0.8 dm, proximally with simple and short-stalked, 2--3-rayed hairs < 0.4 mm. Leaf: basal 0.8--1.5 mm wide, entire; hairs short-stalked, 2--4-rayed, 0.05--0.4 mm; cauline 2--4, distal hairy, basal lobes 0. Inflorescence: 2--5-flowered, not 1-sided in fruit; fruit pedicel erect to ascending, straight, 2--7 mm, hairs +- appressed, branched, or glabrous. Flower: sepals hairy; petals 3--5 mm, 0.7--1 mm wide, white; pollen ellipsoid. Fruit: erect to ascending, generally appressed, 1.3--3.3 cm, 4--5 mm wide, glabrous; style 0.05--0.4 mm; ovules 8--12. Seed: in 1 row, 3--5 mm; wing 0.8--2 mm wide.
Ecology: Barren gravel flats; Elevation: 2100--3400 m. Bioregional Distribution: s SNH (Tulare Co.). Flowering Time: May--Jul
Synonyms: Arabis pygmaea Rollins
eFlora Treatment Author: Michael D. Windham & Ihsan A. Al-Shehbaz
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory

Previous taxon: Boechera pulchra
Next taxon: Boechera rectissima

Name Search
botanical illustration including Boechera pygmaea

Contact/Feedback

Citation for this treatment: Michael D. Windham & Ihsan A. Al-Shehbaz 2016. Boechera pygmaea, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=91731, accessed on February 12, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 12, 2016.


Geographic subdivisions for Boechera pygmaea:
s SNH (Tulare Co.).
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.
READ ABOUT YELLOW FLAGS
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).

View elevation by latitude chart
Data provided by the participants of the Consortium of California Herbaria.
View all CCH records

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.