Vascular Plants - Caryophyllaceae - Minuartia:
Minuartia obtusiloba
Page Author: David Giblin
twinflower sandwort, alpine sandwort 
Blooms: June-September
Habit: herb
Duration: perennial
Origin: Native
Conservation Status: Abundant; of no concern.

Distribution: In mountains throughout much of Washington; Alaska south to Oregon, south in the Rocky Mountains to New Mexico.
Habitat: Subalpine to alpine ridges and talus slopes.
Species Description:

General: Tufted perennial, forming mats up to 4 dm. broad, the stems trailing, the flowering stems 1-6 cm. tall, glandular-pubescent.
Leaves: Leaves opposite, numerous, over-lapping, 1-nerved, linear, 5-8 mm. long and less than 0.5 mm. broad.
Flowers: Flowers erect, usually solitary, with 1-2 pairs of bracts along the stem; sepals 5, 4-5 mm. long, 3-nerved, oblong, obtuse, the tip hood-shaped; petals 5, white, up to twice as long as the sepals; stamens 10; styles 3.
Fruits: Capsule ovoid-cylindric, up to twice as long as the sepals, opening by 3 valves.
Accepted Name:
Minuartia obtusiloba (Rydb.) House
Synonyms:
Arenaria obtusiloba (Rydb.) Fern.
Cherleria obtusiloba (Rydb.) A.J. Moore

Treated in Flora of the PNW as:
Arenaria obtusiloba
Additional Resources:

PNW Herbaria Specimens: View list of all Minuartia obtusiloba specimens in the Consortium of Pacific Northwest Herbaria database.

WTU Herbarium Specimens: View list of Minuartia obtusiloba specimens in the WTU Herbarium database.

Washington Flora Checklist: Minuartia obtusiloba treatment.

E-Flora BC: Minuartia obtusiloba atlas page.

CalPhotos: Minuartia obtusiloba images.

USDA Plants Database: Minuartia obtusiloba.
Additional photographs of Minuartia obtusiloba:
(click on a thumbnail to view larger photo)

Ben Legler, 2004

Ben Legler, 2004

Jim Riley

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Tim Hagan, 2005

G. D. Carr, 2010

G. D. Carr, 2010

G. D. Carr, 2010

G. D. Carr, 2010

G. D. Carr, 2010

G. D. Carr, 2010

G. D. Carr, 2010

G. D. Carr, 2010

Ray Izumi, 2009

Ray Izumi, 2009

Ray Izumi, 2011

Ray Izumi, 2011

Gary Brill, 2013

Gary Brill, 2013

Gary Brill, 2013

Gary Brill, 2013

Susan McDougall, 2014

Susan McDougall, 2014

Don Jacobson, 2016

Don Jacobson, 2016

Craig Althen, 2012

Craig Althen, 2012

Craig Althen, 2012
(password required)

Burke Museum


©2018 Burke Museum of Natural History and Culture.
All Rights Reserved. Box 353010, University of Washington,
Seattle, WA 98195-3010, Phone: 206-543-5590.
On the UW campus at 17th Avenue NE and NE 45th Street.
Washington Native Plant Society
WA Native Plant Society