The Morton Arboretum
The Field Museum
Chicago Botanic Garden
Additional Partners
Log In
New Account
Sitemap
Home
Search Collections
Map Search
Browse Images
Inventories
Aquatic Invasive Plant Guide
Naturalized flora of The Morton Arboretum
vPlants Checklist
Chicago Region Checklists and Inventories
Interactive Tools
vPlants Dynamic Key
Dynamic Checklist
Dynamic Key
Physaria alpestris
Suksd.
Family:
Brassicaceae
Washington Bladderpod
FNA
Resources
Steve L. O´Kane Jr. in Flora of North America (vol. 7)
Perennials;
caudex usually simple, rarely branched, (ces-pitose); (silvery) pubescent throughout, trichomes several- rayed, rays (1- or) 2-bifurcate, (low-umbonate, tubercles rel-atively few, small).
Stems
several from base, decumbent to ascending, (unbranched), 0.5-1.5 dm.
Basal leaves:
(petiole slender); blade obovate, 3-5 cm (width 10-20 mm, base tapering abruptly to petiole), margins entire, (apex rarely slightly acute).
Cauline leaves:
blade oblanceolate, 0.5-1.5 cm (width 3-5 mm), margins entire.
Racemes
subcorymbose.
Fruiting pedicels
(divaricate, straight), 5-10 mm.
Flowers:
sepals oblong, 8-10 mm; petals spatulate, 12-14 mm.
Fruits
didymous, mostly highly inflated (strongly flattened at least in 1/2 toward replum), 14-18 × 14-18 mm, (papery, basal sinus slightly notched, apical open, shallow); valves (retaining seeds after dehiscence), evenly pubescent; replum lanceolate, 7-10 mm, width 1.5-2.5 mm, as wide as or wider than fruit, apex acute to acuminate); ovules 8-10 per ovary; style 5-7 mm.
Seeds
flattened, (2-3 mm).
2
n
= 48-52, 52, 64, 67-70.
Flowering May-Jun. Alpine scree, rocky ridges, talus slopes, volcanic sands and gravel, serpentine gravel, granitic slopes, mountain shrub, subalpine fir, and whitebark pine communities; (700-)1300-2400 m; Wash.
Open Interactive Map
Click to Display
49 Total Images