Braya purpurascens var. longii

• Interesting Facts
• Description
• Taxonomy
• Similar Species
• More Info
• Further Reading
• Notes

Interesting Facts

Description

Genus Braya

Herbs perennial with simple or many-branched caudices, sometimes forming cushions . Trichomes simple or forked . Basal leaves petiolate , rosulate, simple, entire or dentate , rarely pinnately lobed , petiolar base persistent . Cauline leaves absent, rarely few, sessile or nearly so, not auriculate , entire or rarely dentate. Racemes ebracteate or only lowermost flowers bracteate , elongated or not in fruit. Fruiting pedicels erect or divaricate . Sepals ovate or oblong , caducous or persistent, erect, base of lateral pair not saccate , margin membranous. Petals white, pink, or purple, rarely yellow, longer than sepals; blade obovate or oblanceolate , apex obtuse or rounded ; claw shorter than sepals. Stamens 6, tetradynamous ; filaments dilated at base; anthers ovate or oblong, obtuse at apex. Nectar glands 4, 1 on each side of lateral stamen; median glands absent. Ovules 4-26 per ovary. Fruit dehiscent siliques or silicles , linear , oblong, ovoid , or lanceolate, terete or slightly latiseptate , sessile; valves with a distinct midvein , glabrous or pubescent , smooth or torulose ; replum rounded; septum complete , membranous, translucent ; style obsolete or to 1 mm; stigma capitate, entire or slightly 2-lobed. Seeds uniseriate or rarely biseriate , wingless, oblong or ovoid, plump; seed coat minutely reticulate , not mucilaginous when wetted; cotyledons incumbent .

Six polymorphic species: alpine , subarctic , or temperate regions of Asia, Europe, and North America; three species in China.

Braya siliquosa Bunge (from Kazakhstan, Mongolia, and Russia) was recorded from Qinghai and Yunnan in FRPS, Fl. Qinghai. (1: 501. 1997), and Fl. Yunnan. (6: 117. 1995), but these records are based on misidentified plants of Neotorularia humilis.[1]

Taxonomy

Similar Species

Members of the genus Braya

ZipcodeZoo has pages for 11 species, subspecies, varieties, forms, and cultivars in this genus:

B. fernaldii (Fernald's Northern Rockcress) · B. glabella (Smooth Northern-Rockcress) · B. glabella purpurascens (Smooth Northern-Rockcress) · B. glabella subsp. purpurascens (Smooth Northern-Rockcress) · B. humilis (Low Braya) · B. linearis (Narrowfruit Braya) · B. longii (Long's Braya) · B. pilosa (Hairy Braya) · B. purpurascens; (Smooth Northern-Rockcress) · B. purpurascens purpurascens (Smooth Northern-Rockcress) · B. thorild-wulffii (Greenland Northern Rockcress)

More Info

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Further Reading

Notes

Contributors

• Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 10, 2012.

Identifiers

• International Plant Names Index (IPNI) ID: 36274-2
• Zipcode Zoo Species Identifier: 3824163

Footnotes

1. Tai-yien Cheo, Lianli Lu, Guang Yang, Ihsan Al-Shehbaz & Vladimir Dorofeev "Braya". in Flora of China Vol. 8 Page 186. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]

©2004-2012 David Stang. All rights reserved.